Apple IMac (24 Inch Mid 2007)

© 2007 Apple Inc. All rights reserved.  Service Source iMac (24-inch Mid 2007) August 2007 ii iMac (24-inch Mid 2007) Contents Take Apart General Information 6 Product View 6 Opening the Computer 6 Note About Images in This Manual 6 Serial Number Location 7 General Tools 8 Required Special Tools 8 Removing the Glass Panel 9 View of the Main Modules 9 View of the Rear Housing and Cables 10 Cleaning and Handling the Glass Panel 11 Handling a Broken Glass Panel 12 Safety 13 EMI Shielding 14 Access Door 15 Memory 17 Glass Panel 20 Cleaning and Handling of the Glass Panel 21 Removing the Glass Panel 23 Replacing the Glass Panel 26 Installing a Replacement Glass Panel 31 Front Bezel 36 Camera Board 42 Battery 45 IR (Infrared) Board 48 AirPort Extreme Card 51 Bluetooth Card 58 LCD Display Panel 61 iii Speaker, Left 68 Ambient Temperature Sensor Cable 73 Ambient Temperature Sensor 78 LVDS Cable 82 Inverter Cable 85 Speaker, Right 90 Optical Drive Fan 95 CPU Fan 98 Power Supply, AC/DC 101 Hard Drive 108 Hard Drive Sensor Cable 115 Optical Drive 118 Optical Flex Cable 124 Optical Sensor Cable 126 Logic Board 129 Video Card 137 Hard Drive Fan 142 AC Power Inlet 145 Audio Board 150 Stand 153 Clutch Cover 159 Clutch Mechanism 162 Camera Cable 167 Microphone Cable 172 Hard Drive Data Cable 178 DC Power Cable 181 Rear Cover 186 iv Chassis 189 Troubleshooting General Information 195 Serial Number 195 Power On Self Test (POST) 196 DDR Memory 196 Diagnostic LEDs 198 Symptom Charts 200 Power Issues 201 No Video 202 Display 206 Hard Drive 207 Optical Drive 209 Fan Sound 214 AirPort 218 Bluetooth 219 IR Remote 220 IR Sensor/Receiver 221 Built-in iSight Camera 222 Speakers 224 Mouse 225 Keyboard 226 Error Beep(s) 228 USB 228 Views iMac (24-inch 2007)—Upper Exploded View 230 iMac (24-inch 2007)—Lower Exploded View 231 Screw Chart (in Progress!) 232 © 2007 Apple Inc. All rights reserved.  Service Source Take Apart iMac (24-inch Mid 2007) iMac (24-inch Mid 2007) Take Apart — General Information 6 General Information Product View Opening the Computer Important: The glass panel on the iMac should only be removed by Apple authorized technicians. Removing the glass panel requires special tools and must be done prior to replacing any module other than the SO-DIMMs. Be sure to read and follow all of the handling and cleaning recommendations to prevent damaging the LCD panel. Be sure to follow ESD-safe repair practices when the front bezel and the LCD display are removed. Note About Images in This Manual Small differences in appearance between the images pictured and the actual computer you are servicing may exist, however the steps and sequence are the same unless otherwise noted. iMac (24-inch Mid 2007) Take Apart — General Information 7 Serial Number Location On the bottom of your iMac stand, you’ll find a label with the serial number printed on it. This label also provides the computer configuration and an “EMC” number (EMC No.). To confirm the configuration from the Apple menu, choose About This Mac. The Processor listing will show the speed of the processor followed by the processor type. The iMac (24-inch, 2007) has several features that distinguish it from earlier iMac models: 2.4 GHz Intel Core 2 Duo processor (CTO option: 2.8 GHz Core 2 Duo)• ATI Radeon HD 2600 Pro with 256 MB GDRR3 VRAM• 24-inch widescreen flat panel display (1920x1200 native resolution)• 320 GB hard disk (CTO options : 500 GB or 750 GB)• 1 GB (1x 1GB) 667 MHz with support up to 4.0 GB system memory• Built-in stereo speakers with internal 24-watt digital amplifier• New Apple keyboard, wired (CTO option: new Apple keyboard, wireless) • iMac (24-inch Mid 2007) Take Apart — General Information 8 General Tools The following tools are required to service the computer: ESD-safe workstation and mat• Soft, clean towel or cloth (to protect the display and removed parts from scratches)• Black stick (or other non-conductive nylon or plastic flat-blade tool)• Phillips #1 screwdriver• Phillips #2 screwdriver• Torx T6 screwdriver (magnetized)• Torx T8 screwdriver (magnetized)• Torx T10 screwdriver (magnetized)• Flat-blade screwdriver• ESD bags• Required Special Tools Special tools are required to remove, handle, and clean the glass panel such as the following. View the tools in the Glass Panel take apart chapter. 922-8252 Suction cups, Pkg. of 2 1. 922-8261 Sticky silicon roller (6-inch) to clean the glass panel 2. 922-8262 Sticky sheet pads to clean the silicon roller 3. 922-8263 Polishing cloths, clean, anti-static, optical grade micro fiber “terry” style cloth4. 922-8253 Gloves, lint-free, anti-static, Pkg. of 2 5. 922-8259 Microfoam bag to store the glass panel, Pkg. of 56. 922-8258 ESD bags, 24x20, Pkg. of 5, to store the LCD panel. 7. Note: To prevent the buildup of static charges which may attract dust particles to the surface of the display, store the LCD panel in an anti-static bag whenever it has been removed from the system. iKlear Apple Polish or Brillianize anti-static spray cleaning solution. A list of where iKlear/8. Brillianize can be obtained is listed in the Glass Panel chapter of the service manuals. iMac (24-inch Mid 2007) Take Apart — General Information 9 Removing the Glass Panel View of the Main Modules iMac (24-inch Mid 2007) Take Apart — General Information 10 View of the Rear Housing and Cables iMac (24-inch Mid 2007) Take Apart — General Information 11 Cleaning and Handling the Glass Panel The iMac (24-inch Mid 2007) model has a glass panel that attaches to the outside of the front bezel. The glass panel is not tempered and will break into sharp pieces if mishandled. A scratched or broken glass panel is not covered under warranty. To prevent contamination, the glass panel must only be handled by the edges while wearing lint-free gloves. Removing the glass panel requires special tools and must be done prior to replacing any module other than the SO-DIMM’s. Special tools such as lint-free gloves, rubber suction cups, a sticky silicon roller, microfoam storage bags, and the iKlear cleaning solution are required to remove, handle, and clean the glass panel. The complete list of tools and resources can be found in the Glass Panel take apart chapter. DO Handle glass panel using lint free gloves.• Use only a sticky silicon roller to clean the inside surface of the glass and the LCD panel.• Use iKlear to clean • ONLY the outside surface of the glass panel. Place the glass panel into a clean protective microfoam bag when it is not installed on an • iMac. Store the glass panel in a safe area where it will not be broken or damaged.• Store the LCD panel in an anti-static bag to prevent the buildup of static charges which may • attract dust particles to the display’s surface. DO NOT Touch the inside of the glass with bare hands or dirty gloves. Difficult to remove fingerprints • will result. Clean the inside surface of the glass or the LCD with iKlear or other cleaning solutions.• Place the glass panel onto a work surface where it may collect dust and other contaminants • unless it has first been placed into its protective microfoam bag. Use single wipe iKlear packets or other cleaning solutions to clean the glass.• Click on photo--->> iMac (24-inch Mid 2007) Take Apart — General Information 12 Handling a Broken Glass Panel The glass panel is not tempered and will break into sharp pieces if mishandled. If the glass is broken it must be carefully removed from the iMac to prevent irreparable damage to the front surface of the LCD. If the front surface of the LCD is scratched by the broken glass the LCD may need to be replaced. Do not handle broken glass unless you are wearing protective cut-resistant gloves. The lint-free gloves used to prevent contamination of the glass panel are not suitable for handling broken glass. Use a broom and dust pan to sweep up as much of the broken glass as possible. Glass fragments may have travelled several feet from the location of the glass panel so be sure to thoroughly clean the entire area. Use a vacuum to remove the smaller fragments not picked up by the broom iMac (24-inch Mid 2007) Take Apart — General Information 13 Safety WARNING: HIGH VOLTAGE: The highlighted module below is an AC/DC power supply that poses a shock hazard. When the computer is under power, be aware that the power supply contains high voltages that pose a potential hazard to your personal safety. Never work on or near the power supply with the unit powered on; and as a further precaution, always make sure the unit is unplugged when working on it with the front bezel removed. A white, shock- hazard warning symbol is silk-screened in the middle of the power supply module. WARNING: Text or photographs marked by this symbol indicate that a potential hazard to your personal safety exists from a high voltage source. The AC/DC power supply board is a high-voltage source with the unit under power, and remains powered up whenever the system is plugged in, whether or not the system is turned on. Use extreme caution when troubleshooting the system with the front bezel removed. Disconnect power to the system before performing maintenan• ce. Disconnect ESD wrist straps when working on a plugged in system. • Don’t work alone. In the event• of an electrical shock, it is important to have another individual present who can provide assistance. Keep one hand in your pocket when working on any • computer that is plugged in. This will help ensure that your body does not provide a path to ground in the event that you accidentally make contact with the line voltage. Don’t wear jewelry, watches, necklaces, or other metallic articles that could present a risk • if they accidentally make contact with the power supply circuitry. iMac (24-inch Mid 2007) Take Apart — General Information 14 EMI Shielding The rear cover of the computer is wrapped in EMI shielding that is easily torn and damaged. To maintain a properly shielded unit, you must repair all accidental tears and cracks to the shielding by covering them with EMI tape that can be ordered from Apple service. iMac (24-inch Mid 2007) Take Apart — Access Door 15 Access Door Tools Phillips #2 screwdriver• ESD-safe workstation and mat• Soft , clean towel or cloth• Preliminary Steps Before you begin, place the computer face down on a clean, soft, lint-free cloth so that the bottom is facing you. Part Location iMac (24-inch Mid 2007) Take Apart — Access Door 16 Removing the Access Door Disconnect all cables and the power cord from your iMac.1. Place a soft, clean towel or cloth on your work surface. Hold the side of the iMac and lay it 2. down so that the screen is against the surface and the bottom is facing you. Raise the stand and use a Phillips #2 screwdriver to loosen the captive screw on the memory 3. access door by turning it counterclockwise. Remove the access door.4. Replacing the Access Door Position the computer face down on a clean, soft, lint-free cloth so that the bottom is facing 1. you. Position the access door on the rear housing over the memory compartment. 2. Use a Phillips #2 screwdriver to tighten the captive screw.3. iMac (24-inch Mid 2007) Take Apart — Memory 17 Memory This computer comes with a minimum of 1GB of 667 MHz PC2-5300 Double Data Rate 2 (DDR2) Small Outline Dual Inline Memory Modules (SO-DIMMs). It has two slots that can accept DIMMs. A 1 GB, or 2 GB memory module may be installed for a maximum of 4 GB of memory. Tools ESD mat • Soft , clean towel or cloth• Preliminary Steps Before you begin, remove the access door. Warning: Always shut down the computer and remove the power cord before installing memory. Do not attempt to install memory in the computer while it is plugged in. Part Location iMac (24-inch Mid 2007) Take Apart — Memory 18 Removing the Memory Shut down the computer, and disconnect all cables including the power cord.1. Holding the sides of the computer, lay it face down on a soft, clean cloth so the stand is 2. facing you. After removing the access door, touch the metal stand or bezel to discharge any static 3. electricity from your body. Important: Always discharge static before you touch any parts such as the memory board. To avoid generating static electricity, do not walk around the room until you have finished replacing the memory. Untuck the tab in the memory compartment. If you are replacing a memory module, untuck 4. the tab and pull it to eject the installed memory module. Set the memory module(s) aside.5. iMac (24-inch Mid 2007) Take Apart — Memory 19 Replacing the Memory With the computer face down, orient the notch on the DIMM with the notch in the memory 1. slot. In this case, the notch is on the left. With your fingers, press the DIMM fully into the slot until you hear a click. Repeat for the 2. other DIMM slot. Fold the black tab over each DIMM. 3. Replace the memory access door.4. Use a Phillips #2 screwdriver to tighten the captive screw on the memory access door.5. Make sure the computer recognizes the new memory by opening System Profiler, clicking 6. More Info, and clicking Memory. iMac (24-inch Mid 2007) Take Apart — Glass Panel 20 Glass Panel Tools This procedure requires the following tools: Suction cups (922-8252)• Sticky silicon roller (6-inch) to clean the glass panel (922-8261)• Sticky sheets to clean the silicon roller (922-8262)• Polishing cloths, clean, anti-static, optical grade micro fiber “terry” style cloth (922-8263)• iKlear Apple Polish or Brillianize anti-static spray cleaning solution • Gloves, lint-free, anti-static (922-8253)• Microfoam bag to store the glass panel (922-8259) • ESD bag for LCD display storage (922-8258)• Note: Tools without part numbers can be sourced directly from the vendor. Refer to “Cleaning Tool Resources” at the end of this chapter. Part Location iMac (24-inch Mid 2007) Take Apart — Glass Panel 21 Cleaning and Handling of the Glass Panel The iMac (24-inch Mid 2007) model has a glass panel that attaches to the outside of the front bezel. The glass panel is not tempered and will break into sharp pieces if mishandled. A scratched or broken glass panel is not covered under warranty. To prevent contamination the glass panel must only be handled by the edges while wearing lint-free gloves. Removing the glass panel requires special tools and must be done prior to replacing any module other than the SO-DIMM’s. Special tools such as lint-free gloves, rubber suction cups, a sticky silicon roller, microfoam storage bags, and the iKlear cleaning solution are required to remove, handle, and clean the glass panel. DO Handle glass panel using lint free gloves.• Use only a sticky silicon roller to clean the inside surface of the glass and the LCD panel.• Use iKlear to clean • ONLY the outside surface of the glass panel. Place the glass panel into a clean protective microfoam bag when it is not installed on an • iMac. Store the glass panel in a safe area where it will not be broken or damaged.• DO NOT Touch the inside of the glass with bare hands or dirty gloves. Difficult to remove fingerprints • will result. Clean the inside surface of the glass or the LCD with iKlear or other cleaning solutions.• Place the glass panel onto a work surface where it may collect dust and other contaminants • unless it has first been placed into its protective microfoam bag. Use single wipe iKlear packets or other cleaning solutions to clean the glass.• Click on photo--->> iMac (24-inch Mid 2007) Take Apart — Glass Panel 22 Metal Alignment Pins on the Glass Panel There are alignment pins at the top of the glass panel near the camera, one pin at the bottom near the IR remote sensor, and a pin on the left and right side of the glass. Important: If the glass is removed from the bezel at an angle, the metal alignment pins may bend, causing scratches on the inside of the glass and possibly requiring replacement of the glass panel. Magnets on the Front Bezel The glass panel has a thin silver ferrous metal band affixed to the perimeter which is magnetically attracted to the fourteen magnets (circled below) which are attached to the front bezel. These magnets hold the glass panel in place. Suction cups are used to pull the glass panel away from the magnets on the front bezel. . iMac (24-inch Mid 2007) Take Apart — Glass Panel 23 Removing the Glass Panel Apple 1. strongly recommends wearing clean lint-free gloves whenever handling the glass panel. The gloves protect the glass panel from body oils, dirt, and other contaminants. Put on a pair of clean gloves with the rubberized-side of the gloves on the palm side of your hand. Position the computer on the rear cover, on a soft protective lint-free surface, with the stand 2. facing you Clean off the suction cups, making sure they are free of contaminants. It may be necessary to 3. wash the suction cups with a mild liquid soap in order to remove the residual release agents applied during manufacturing. iMac (24-inch Mid 2007) Take Apart — Glass Panel 24 4. Gently press the suction cups in opposite corners on the glass panel, as shown. Important: Make sure the suction cups are firmly attached to the glass before lifting the glass. Hold onto the suction cups and gently lift the glass panel 5. straight up and off the bezel. Set the glass down on the microfoam bag or clean lint-free surface and remove the suction 6. cups. Squeeze the base of each suction cup to release them from the glass panel. Click on photo--->> iMac (24-inch Mid 2007) Take Apart — Glass Panel 25 Touching only the edges of the glass, slide the glass panel into the microfoam static-free 7. bag. Set the glass aside in a location where it won’t get damaged. The bag will help minimize contamination of the glass. iMac (24-inch Mid 2007) Take Apart — Glass Panel 26 Replacing the Glass Panel Put on a pair of clean gloves with the rubberized-side of the gloves on the palm side of your 1. hand. Install the LCD display panel onto the computer if it was removed.2. Replace the font bezel if it was removed, connect the microphone cable and replace the 3. bezel screws. Locate the sticky silicon roller (a different model roller is shown in the procedure) and 4. the dust removal pad. Remove the protective covering on the silicon roller and peel the protective cover off the dust removal pad. iMac (24-inch Mid 2007) Take Apart — Glass Panel 27 Holding the sticky paper with your free hand, clean the silicon roller on the sticky paper by 5. rolling the roller back and forth once or twice on the sticky paper. If the sticky paper has been used multiple times and looks dirty, use a new piece of sticky paper. Set the roller aside on its clean protective cover while you prepare the glass and computer.6. iMac (24-inch Mid 2007) Take Apart — Glass Panel 28 REMINDER: WEAR CLEAN GLOVES AND ONLY HANDLE THE GLASS BY THE EDGES.7. Stand the computer upright. 8. Note: Less dust particles will settle on the LCD panel with the computer in the vertical position. Roll the sticky silicon roller over the LCD panel to remove any particles. 9. Note: A larger silicon roller was used for demonstration purposes, however; the 6-inch silicon roller from Apple service will suffice. Remove the glass panel from the microfoam bag. Place the glass on the bag with the inside 10. surface of the glass (side with metal pins) facing up. iMac (24-inch Mid 2007) Take Apart — Glass Panel 29 Clean the 11. INSIDE of the glass panel with the clean silicon roller. Gently roll the clean silicon roller over the inside of the glass. Note: The glass panel is delicate and will break if too much pressure is applied. Holding the glass by the edges, carefully line up the metal pins on the inside of the glass 12. panel with the holes at the top of the front bezel and the hole at the bottom of the bezel. Gently lower the glass panel onto the bezel. The magnets on the front bezel will pull panel and hold the glass panel in place. iMac (24-inch Mid 2007) Take Apart — Glass Panel 30 13 . Clean the outside of the glass panel with a clean microfiber cleaning cloth. If necessary, spray a small amount (two pumps) of iKlear polish on the outside of the glass panel. Wipe the glass until the solution completely disappears and there is no longer any residue or haze. Once the glass has been cleaned and polished, visually inspect the glass for any remaining 14. dust, fingerprints, or a hazy residue. If there are contaminates trapped between the LCD panel and the glass panel repeat the cleaning procedure described in this section before returning the system to the customer. Replace the memory access door.15 . Click on photo--->> iMac (24-inch Mid 2007) Take Apart — Glass Panel 31 Installing a Replacement Glass Panel Stand the computer 1. upright. Note: Fewer dust particles will settle on the LCD panel with the computer in the vertical position. Roll the sticky silicon roller over the LCD panel to remove any particles. 2. Remove the new glass panel from the service packaging. 3. Note: The new panels have a removable film protecting the glass on both sides. Place the glass on a clean microfoam bag with the inside of the glass facing up (the side 4. with metal pins.) Wearing gloves, carefully remove the protective film from the inside surface of the glass. Click on photo--->> iMac (24-inch Mid 2007) Take Apart — Glass Panel 32 Clean the INSIDE surface of the glass panel with the silicon roller. Gently roll the clean silicon 5. roller over the inside surface of the glass. Note: The glass panel is delicate and will break if too much pressure is applied. Holding the glass by the edges, carefully line up the metal pins on the inside of the glass 6. panel with the holes at the top of the front bezel and the hole at the bottom of the bezel. Gently lower the glass panel onto the bezel. The magnets on the front bezel will pull and hold the glass panel in place. iMac (24-inch Mid 2007) Take Apart — Glass Panel 33 Peel the protective film from the outside surface of the glass panel. If the glass panel pulls 7. away from the front bezel, gently hold it in place while removing the protective film. 8. Clean the outside of the glass panel with a clean microfiber cleaning cloth. If necessary, spray a small amount (two pumps) of iKlear polish on the outside of the glass panel. Wipe the glass until the solution completely disappears and there is no longer any residue or haze. Once the glass has been cleaned and polished, visually inspect the glass for any remaining 9. dust, fingerprints, or a hazy residue. If there are contaminates trapped between the LCD panel and the glass panel repeat the cleaning procedure described in this section before returning the system to the customer. Replace the memory access door.10. Click on photo--->> iMac (24-inch Mid 2007) Take Apart — Glass Panel 34 Cleaning Tool Resources Apple Retail Stores1. MCM Portal (http://www.mcmb2b.com/appleasp)• iKlear distributors: (http://www/klearscreen.com/iKlear.aspx)• iKlear International dealer listing• : http://meridrew.com/international.html iKlear US/Canada dealer listing:• http://meridrew.com/search/search.php Japan: Pleiades Digital Communications, Inc.www.pleiadesdesigns.co.jp2. Brillianize is an alternative cleaning solution http://www.brillianize.com/3. Brillianize products are listed here: http://www.brillianize.com/products2.html• Brillianize dealer locator: http://www.brillianize.com/brillianize_dealer_locator.htm• Cleaning Cloth4. The micro fiber “terry” style cleaning cloth can be purchased directly from iKlear or • Brillianze iMac (24-inch Mid 2007) Take Apart — Glass Panel 35 Ultra Violet Inspection Lamp An optional tool used to detect dust and contamination is the ultra violet inspection light. The Bayco UV Inspection Lamp, 13 watt twin tube plug-in model shown below is one example of a low-cost model that works well. In the US service providers can order the lamp at: http://www. amazon.com Other sources can be found using Google. The UV inspection lamp can be used to highlight contaminates that may not be easily viewed under normal lighting conditions. Dim or turn off the normal task lighting and turn on the UV inspection lamp. Pass the UV inspection lamp over the glass panel and note any dust particles or contaminates that would be objectionable to the customer. Wipe the microfiber cloth over the area where the contaminates have been observed to determine whether they are on the outside or inside surface of the glass. iMac (24-inch Mid 2007) Take Apart — Front Bezel 36 Front Bezel Tools This procedure requires the following tools: Torx T8 screwdriver• Soft, clean towel or cloth• Preliminary Steps Before you begin, remove the access door and glass panel. Part Location iMac (24-inch Mid 2007) Take Apart — Front Bezel 37 Removing the Front Bezel Place the computer on a soft protective lint-free surface such as a very clean ESD mat to 1. avoid damaging the finish on the stand or rear housing. Position the computer on the rear cover with the stand facing you. 2. 3. Remove the twelve screws around the bezel. Replacement Note: The two longer screws (30mm) attach to the bezel along the bottom of the panel, on the right and left side of the Apple logo. The two medium length screws (19mm) attach above and below the optical drive on the right side, and the six shorter screws (15mm) attach around the top, left side, and bottom. 30mm 19mm 19mm 15mm 19mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 30mm 30mm iMac (24-inch Mid 2007) Take Apart — Front Bezel 38 With the upper corners loosened, lift up—but do not remove—the bezel.4. Notice the connected microphone cable at the top of the bezel. Without straining the cable, 5. hold the bezel up, and disconnect the microphone cable from the cable extension. iMac (24-inch Mid 2007) Take Apart — Front Bezel 39 Continue lifting the front bezel toward you and off the rear housing.6. iMac (24-inch Mid 2007) Take Apart — Front Bezel 40 Replacing the Front Bezel Place the computer on a soft protective lint-free surface such as a very clean ESD mat to 1. avoid damaging the finish on the stand or rear housing. Position the computer on the rear cover with the stand facing you. 2. Position the bottom of the front bezel over the bottom edge of the rear cover. 3. Lower the front bezel, connect the microphone cable to the extension cable and tuck the 4. cable into the computer housing. Carefully lower the bezel onto the computer, and make sure the cable cannot be pinched. iMac (24-inch Mid 2007) Take Apart — Front Bezel 41 Replace the twelve screws around the bezel. 5. The two longer screws (30mm) attach to the bezel along the bottom of the panel, on the right and left side of the Apple logo. The two medium length screws (19mm) attach above and below the optical drive on the right side, and the six shorter screws (15mm) attach around the top, left side, and bottom. Clean and replace the glass panel6. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door7. . 30mm30mm 19mm 19mm30mm 19mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm 15mm iMac (24-inch Mid 2007) Take Apart — Camera Board 42 Camera Board Tools Torx T8 screwdriver • ESD mat, soft , clean towel or cloth• Preliminary Steps Before you begin, remove the access door , glass panel, and front bezel. Part Location iMac (24-inch Mid 2007) Take Apart — Camera Board 43 Removing the Camera Board The camera board bracket and cable are visible after you remove the front bezel off the 1. computer. 2. Remove two T8 screws on the camera bracket. Lift the camera bracket out of the rear housing enough to access the Kapton tape securing 3. the camera cable. Unwrap the Kapton tape covering the camera cable and connector. Disconnect the camera 4. cable from the camera board. Set the camera board and attached bracket aside. iMac (24-inch Mid 2007) Take Apart — Camera Board 44 Replacing the Camera Board Connect the camera cable to the camera board. Reapply the kapton tape over the cable and 1. connector. Lower the camera bracket onto the black posts on the rear cover.2. 3. Replace the two T8 screws. Replace the front bezel4. . Clean and replace the glass panel5. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door6. . iMac (24-inch Mid 2007) Take Apart — Battery 45 Battery Tools The only tool required for this procedure is a black stick (or other nonconductive plastic or nylon tool). Preliminary Steps Before you begin, remove the following: Access door• Glass panel • Front bezel• Part Location iMac (24-inch Mid 2007) Take Apart — Battery 46 Removing the Battery Use a black stick to pry out the battery from the battery socket on the logic board.1. Before installing the battery, make sure the side with the engraved markings (+ side) is up .2. iMac (24-inch Mid 2007) Take Apart — Battery 47 Replacing the Battery Make sure the battery socket is open and free of dust.1. Press the battery into the socket. Make sure the side with the engraved markings (+ side) is 2. facing up. Replace the front bezel3. . Clean and replace the glass panel4. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door5. . iMac (24-inch Mid 2007) Take Apart — IR (Infrared) Board 48 IR (Infrared) Board Tools The only tool required for this procedure is a Torx T6 screwdriver. Preliminary Steps Before you begin, remove the following: Access door• Glass panel • Front bezel• Part Location iMac (24-inch Mid 2007) Take Apart — IR (Infrared) Board 49 Removing the IR Board Note1. : Small differences in appearance between the images pictured and the actual computer you are servicing may exist, however the steps and sequences are the same unless otherwise mentioned. Remove the two T6 screws from IR board and disconnect the IR cable from the logic board.2. Lift the IR board from the heatsink. 3. iMac (24-inch Mid 2007) Take Apart — IR (Infrared) Board 50 Replacing the IR Board If removed, connect the IR cable to the IR board.1. Install the IR board and T6 screws.2. Connect the IR cable to the logic board.3. Replace the front bezel4. . Clean and replace the glass panel5. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door6. . iMac (24-inch Mid 2007) Take Apart — AirPort Extreme Card 51 AirPort Extreme Card Tools Torx T6 screwdriver• Preliminary Steps Before you begin, remove the following: A• ccess door Glass Panel• F• ront bezel Part Location iMac (24-inch Mid 2007) Take Apart — AirPort Extreme Card 52 Removing the AirPort Extreme Card 1. Using a T6 torx screwdriver, remove the one 5-mm long screw and disconnect the two antenna cables from the AirPort Extreme card. Note: The antenna cables and connectors are very delicate and should be carefully removed by pulling on the antenna cable connectors, not on the cables. 1. Holding the card by the edges, pull the AirPort Extreme card out of the slot.2. 922-7010 iMac (24-inch Mid 2007) Take Apart — AirPort Extreme Card 53 Replacing the AirPort Extreme Card Align the AirPort Extreme card with the slot on the logic board. Insert the board into the slot.1. Connect the antenna cables to the connectors on the AirPort Extreme card. 2. Note: The antenna cables might include an “L” or “R” tab near the connector end; however, you can disregard that because the cable position can be swapped without any change in performance. Replace the T6 screw. iMac (24-inch Mid 2007) Take Apart — AirPort Extreme Card 54 Replace the front bezel3. . Clean and replace the glass panel4. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door5. . iMac (24-inch Mid 2007) Take Apart — AirPort Extreme Card 55 iMac (24-inch Mid 2007) Take Apart — AirPort Extreme Card 56 iMac (24-inch Mid 2007) Take Apart — AirPort Extreme Card 57 iMac (24-inch Mid 2007) Take Apart — Bluetooth Card 58 Bluetooth Card Tools Torx T6 screwdriver• Preliminary Steps Before you begin, remove the following: Access door• Glass panel • Front bezel• Part Location iMac (24-inch Mid 2007) Take Apart — Bluetooth Card 59 Removing the Bluetooth Card 1. Using a T6 torx screwdriver, remove the two 5-mm long screws from the lower left and upper right opposite corners of the Bluetooth card. Disconnect the Bluetooth antenna from the left side of the card. 2. Note: The antenna cable and connector are very delicate and should be carefully removed by pulling on the antenna cable connector, not on the cable. 922-7010 iMac (24-inch Mid 2007) Take Apart — Bluetooth Card 60 Replacing the Bluetooth Card 1. Press the Bluetooth card onto the logic board connector. Connect the Bluetooth antenna to the Bluetooth card. 2. Replace the two T6 Bluetooth card screws.3. Replace the front bezel4. . Clean and replace the glass panel5. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door6. . 922-7010 iMac (24-inch Mid 2007) Take Apart — LCD Display Panel 61 LCD Display Panel Tools Torx T6 screwdriver• Torx T8 screwdriver• Preliminary Steps Before you begin, remove the following: Access door• Glass panel • Front bezel• Important: To prevent the buildup of static charges which may attract dust particles to the surface of the display, store the LCD panel in an anti-static bag whenever it has been removed from the system. Part Location iMac (24-inch Mid 2007) Take Apart — LCD Display Panel 62 Removing the Display Panel Place the computer with the display face up.1. 2. Remove the two T6 screws from the LVDS connector. Pull the black tab on the LVDS cable to disconnect it from the logic board. 3. Remove the eight 8-mm long T8 screws from the sides of the panel frame. 922-7010 iMac (24-inch Mid 2007) Take Apart — LCD Display Panel 63 Disconnect the display sensor cable from the left side of the logic board.4. Grasp the LCD panel at the bottom edge, and tilt up the panel. Peel back the black tape 5. covering the inverter cable connector on the back of the LCD panel. Pull the connector straight out, toward the power supply. If you are replacing the cable, disconnect the other end from the power supply. Lift the LCD panel off the rear housing. iMac (24-inch Mid 2007) Take Apart — LCD Display Panel 64 Disconnect the LVDS cable LVDS cable from the panel6. On the right side of the panel is the display temp sensor (under the foam at the top) and the 7. display temp sensor cable. These are included with the LCD panel, but they are also offered separately as service parts. Important: To prevent the buildup of static charges which may attract dust particles to the surface of the display, store the LCD panel in an anti-static bag whenever it has been removed from the system. Replacement Note8. : If replacing the display panel, disconnect the LVDS cable from the panel and the inverter cable from the inverter board before returning the module to Apple. Transfer the two cables to the replacement panel. A replacement panel includes the inverter board, display panel mounting brackets, the foam strips and gaskets, the display temp sensor, and the display temp sensor cable. iMac (24-inch Mid 2007) Take Apart — LCD Display Panel 65 Replacing the Display Panel Connect the LVDS cable to the rear of the display panel.1. Connect the inverter cable to the inverter board on the rear of the display panel. Replace the 2. black mylar tape over the inverter cable connector. Make sure the other end of the inverter cable is connected to the power supply.3. Make sure the display temp sensor and the temp sensor cable are connected at the top of 4. the display panel and that the foam is covering the sensor. Lower the LCD panel into the computer assembly.5. 6. Connect the LVDS cable to the logic board. Replace the two T6 screws. 922-7010 iMac (24-inch Mid 2007) Take Apart — LCD Display Panel 66 Connect the display temp sensor cable to the left side of the logic board.7. 8. Install the eight mounting screws. 922-7815 iMac (24-inch Mid 2007) Take Apart — LCD Display Panel 67 Replace the front bezel9. . Clean and replace the glass panel10. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door11. . iMac (24-inch Mid 2007) Take Apart — Speaker, Left 68 Speaker, Left Tools Torx T10 screwdriver• Preliminary Steps Before you begin, remove the following: Access door• Glass panel • Front bezel• LCD Panel• Part Location iMac (24-inch Mid 2007) Take Apart — Speaker, Left 69 Removing the Left Speaker 1. Using a T8 torx screwdriver, remove the long screw from the left speaker. Disconnect the speaker from the audio board. The speaker cable runs under the black plastic 2. cable guide (above the memory slot) and connects to the audio board on the right side of the logic board. iMac (24-inch Mid 2007) Take Apart — Speaker, Left 70 Lift the speaker out of the rear housing.3. iMac (24-inch Mid 2007) Take Apart — Speaker, Left 71 Replacing the Left Speaker 1. Install the speaker in the rear housing. Secure the left speaker with the longer mounting screws. Route the speaker cable under the cable clip on the CPU fan and under the long cable guide 2. above the memory slots. Connect the speaker cable to the audio board on the right side. iMac (24-inch Mid 2007) Take Apart — Speaker, Left 72 Replace the display panel.3. Replace the front bezel4. . Clean and replace the glass panel5. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door6. . iMac (24-inch Mid 2007) Take Apart — Ambient Temperature Sensor Cable 73 Ambient Temperature Sensor Cable Tools No tools are required for this procedure. Preliminary Steps Before you begin, remove the following: Access doo• r Glass panel• Front Beze• l LCD displa• y Speaker, Lef• t Part Location iMac (24-inch Mid 2007) Take Apart — Ambient Temperature Sensor Cable 74 Removing the Ambient Temperature Sensor Cable Disconnect the ambient temp sensor cable and the fan cable from the logic board. Lift the 1. fan out of the system. Disconnect the cable from the sensor board on the speaker.2. iMac (24-inch Mid 2007) Take Apart — Ambient Temperature Sensor Cable 75 Remove the cable.3. iMac (24-inch Mid 2007) Take Apart — Ambient Temperature Sensor Cable 76 Replacing the Ambient Temperature Sensor Cable Connect the cable to the sensor board on the speaker.1. Connect the sensor cable and the fan cable to the logic board.2. Replace the front bezel3. . iMac (24-inch Mid 2007) Take Apart — Ambient Temperature Sensor Cable 77 Clean and replace the glass panel4. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door5. . iMac (24-inch Mid 2007) Take Apart — Ambient Temperature Sensor 78 Ambient Temperature Sensor Tools Black stick (or other nonconductive nylon or plastic flat-blade tool)• Permanent ink felt-tip pen• Preliminary Steps Before you begin, remove the following: Access door• Glass panel • Front bezel• LCD Pane• l Speaker, Lef• t Part Location iMac (24-inch Mid 2007) Take Apart — Ambient Temperature Sensor 79 Removing the Ambient Temperature Sensor Disconnect the ambient temperature sensor cable and the fan cable from the logic board.1. Lift the CPU fan from the system. Disconnect the ambient temperature sensor cable from the 2. cpu fan.. With a black stick, pry the sensor from the fan.3. iMac (24-inch Mid 2007) Take Apart — Ambient Temperature Sensor 80 Replacing the Ambient Temperature Sensor Replacement Note:1. If you are replacing the CPU fan transfer the sensor and the sensor cable to the replacement fan. Place the fan into the rear housing. Connect the temperature sensor cable and the fan cable 2. to the logic board. Replace the LCD panel3. . Replace the front bezel4. . iMac (24-inch Mid 2007) Take Apart — Ambient Temperature Sensor 81 Clean and replace the glass panel5. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door6. . iMac (24-inch Mid 2007) Take Apart — LVDS Cable 82 LVDS Cable Tools Torx T6 screwdriver• Soft, clean towel or cloth• Preliminary Steps Before you begin, remove the following: Access doo• r Glass panel• Front Beze• l LCD displa• y Part Location iMac (24-inch Mid 2007) Take Apart — LVDS Cable 83 Removing the LVDS Cable With the display face down on a soft cloth, peel up the two strips of black tape from the 1. LVDS cable on the back of the display panel. Press in on the LVDS connector lock release clips (1) and gently pull (2) to disconnect the 2. LVDS cable from the back of the panel. Lift the LVDS cable from the display panel.3. iMac (24-inch Mid 2007) Take Apart — LVDS Cable 84 Replacing the LVDS Cable Connect the LVDS cable to the rear of the display panel.1. Replace the tape over the LVDS cable connector.2. With both the LVDS cable and the inverter cable connected to the back of the display panel, 3. install the display panel with eight mounting screws. Connect the other end of the inverter cable to the power supply.4. Connect the LVDS cable to the logic board and replace the two T6 screws.5. Replace the front bezel6. . Clean and replace the glass panel7. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door8. . iMac (24-inch Mid 2007) Take Apart — Inverter Cable 85 Inverter Cable Tools Torx T6 screwdriver• Soft, clean towel or cloth• Preliminary Steps Before you begin, remove the following: Access door• Glass panel • Front bezel• LCD display panel• Part Location iMac (24-inch Mid 2007) Take Apart — Inverter Cable 86 Removing the Inverter Cable Disconnect the inverter cable from the back of the display panel.1. Disconnect the other end of the cable from the power supply.2. Place the LCD panel in a clean ESD bag until the repair is complete to prevent the buildup 3. of static charges which may attract dust particles to the surface of the display. Store the LCD panel in an anti-static bag whenever it has been removed from the system. iMac (24-inch Mid 2007) Take Apart — Inverter Cable 87 Replacing the Inverter Cable Remove the LCD panel from the ESD bag.1. Make sure the display temp sensor cable is connected to the display sensor at the top of the 2. display panel. Connect the inverter cable to the inverter board on the rear of the display panel.3. Connect the other end of the inverter cable to the power supply. 4. iMac (24-inch Mid 2007) Take Apart — Inverter Cable 88 Lower the display panel into the computer.5. Connect the display temp sensor cable to the left side of the logic board.6. 7. Connect the LVDS cable to the logic board. Replace the two T6 screws. 922-7010 iMac (24-inch Mid 2007) Take Apart — Inverter Cable 89 8. Install the eight mounting screws. Replace the front bezel9. . Clean and replace the glass panel10. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door11. . iMac (24-inch Mid 2007) Take Apart — Speaker, Right 90 Speaker, Right Tools Torx T10 screwdriver• Preliminary Steps Before you begin, remove the following: Access door• Glass panel • Front bezel• LCD Panel• Part Location iMac (24-inch Mid 2007) Take Apart — Speaker, Right 91 Removing the Right Speaker 1. Remove the T8 screw from the right speaker. Replacement Note: The shorter of the two speaker mounting screws is used to secure the right speaker; the longer screw secures the left speaker. Disconnect the speaker cable from the audio board.2. Pull it up and out of the computer assembly.3. iMac (24-inch Mid 2007) Take Apart — Speaker, Right 92 Replacing the Right Speaker Install the speaker in the computer assembly.1. Connect the speaker cable to the audio board. 2. 3. Replace the T8 screw on the speaker. Replace the display panel.4. Replace the front bezel5. . Clean and replace the glass panel6. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door7. . iMac (24-inch Mid 2007) Take Apart — Speaker, Right 93 iMac (24-inch Mid 2007) Take Apart — Speaker, Right 94 iMac (24-inch Mid 2007) Take Apart — Optical Drive Fan 95 Optical Drive Fan Tools No tools are required to remove the optical drive fan.• Preliminary Steps Before you begin, remove the following: Access door• Glass panel • Front bezel• LCD Panel• Part Location iMac (24-inch Mid 2007) Take Apart — Optical Drive Fan 96 Removing the Optical Drive Fan Disconnect the fan cable from the logic board.1. Lift the fan off the guide posts on the rear housing.2. iMac (24-inch Mid 2007) Take Apart — Optical Drive Fan 97 Replacing the Optical Drive Fan Lower the fan onto the guide posts in the rear cover. Connect the fan cable to the audio 1. board. Replace the display panel.2. Replace the front bezel3. . Clean and replace the glass panel4. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door5. . iMac (24-inch Mid 2007) Take Apart — CPU Fan 98 CPU Fan Tools Torx T10 screwdriver• Preliminary Steps Before you begin, remove the following: Access door• Glass panel • Front bezel• LCD Panel• Left speaker• Part Location iMac (24-inch Mid 2007) Take Apart — CPU Fan 99 Removing the CPU Fan Disconnect the fan cable and the ambient temp sensor cable from the lower left corner of 1. the logic board. Lift the fan off the guide posts on the rear housing. 2. iMac (24-inch Mid 2007) Take Apart — CPU Fan 100 Replacing the CPU Fan Lower the fan onto the guide posts in the rear housing. Push it down snug onto the posts.1. Connect the ambient temp sensor cable and the fan cable to the logic board connectors. 2. Replace the left speaker.3. Replace the display panel.4. Replace the front bezel5. . Clean and replace the glass panel6. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door7. . iMac (24-inch Mid 2007) Take Apart — Power Supply, AC/DC 101 Power Supply, AC/DC Tools Torx T10 screwdriver• Preliminary Steps Before you begin, remove the following: Access door• Glass panel • Front bezel• LCD Panel• Part Location iMac (24-inch Mid 2007) Take Apart — Power Supply, AC/DC 102 Removing the AC/DC Power Supply WARNING: HIGH VOLTAGE:The AC/DC power supply PCB remains powered up whenever the system is plugged in, whether or not the system has been turned on. Use extreme caution when troubleshooting the system with the front bezel removed. Don’t work alone. In the event of an electrical shock it is important to have another • individual present who can provide assistance. Keep one hand in your pocket when working on any iMac system that is plugged in. • This will help ensure that your body does not provide a path to ground in the event that you accidentally make contact with the line voltage. Don’t wear jewelry, watches, necklaces, or other metallic articles that could present a • risk if they accidentally make contact with the power supply circuitry. 1. Using a Torx T10 screwdriver,remove the four screws from the AC-DC power supply board. Replacement Note: Install the machine screws on the right side and the self tapping screws on the left side. iMac (24-inch Mid 2007) Take Apart — Power Supply, AC/DC 103 2. Lift the power supply up a bit and pinch the black tab on the big connector to disconnect the main power supply cable on the right side. Carefully remove the small ground connector cable from the underside of the power supply. (See next photo.) This shows a close up of the two-pin ground cable connector on the underside of the power 3. supply. iMac (24-inch Mid 2007) Take Apart — Power Supply, AC/DC 104 Disconnect the AC power inlet cable tucked neatly between the right pressure wall (black 4. plastic piece along the right side of the power supply) and the top of the logic board. Lift the power supply from the rear housing. iMac (24-inch Mid 2007) Take Apart — Power Supply, AC/DC 105 Replacing the AC/DC Power Supply WARNING: The AC/DC power supply PCB remains powered up whenever the system is plugged in, whether or not the system has been turned on. Use extreme caution when troubleshooting the system with the front bezel removed. Don’t work alone. In the event of an electrical shock it is important to have another • individual present who can provide assistance. Keep one hand in your pocket when working on any iMac system that is plugged in. • This will help ensure that your body does not provide a path to ground in the event that you accidentally make contact with the line voltage. Don’t wear jewelry, watches, necklaces, or other metallic articles that could present a • risk if they accidentally make contact with the power supply circuitry. 1. Make sure the right and left pressure walls are in place. iMac (24-inch Mid 2007) Take Apart — Power Supply, AC/DC 106 2. Connect the AC inlet cable and tuck the connector into the slot (see arrow) on the right pressure wall. Connect the DC power cable and the ground cable to the power supply.3. iMac (24-inch Mid 2007) Take Apart — Power Supply, AC/DC 107 4. Replace the four T10 power supply screws. Install the machine screws (on the right side) first when installing the power supply. . Replace the display panel.5. Replace the front bezel6. . Clean and replace the glass panel7. . Note: This step is very important. Follow the procedures to ensure the glass is clean and free of particles. Replace the access door8. . iMac (24-inch Mid 2007) Take Apart — Hard Drive 108 Hard Drive Tools Torx T10 screwdriver• Torx T8 screwdriver (if removing clip from hard drive)• Preliminary Steps Before you begin, remove the following: Ac