Replacing the Hard Drive Sensor Cable

Connect the sensor cable to the hard drive and the logic board. Install a new foam gasket on top of the temp sensor. A new foam gasket is included with the replacement hard drive. 4. Clean and replace the glass panel. Note This step is very important. Follow the procedures to ensure the glass is clean and free of particles.

Removing the Display Temp Sensor and Sensor Cable

Peel back any kapton tape securing the sensor cable to the panel. 2. Carefully peel back the black insulator on the right side of the panel to access the entire sensor cable. 3. On the top right corner of the panel, peel back the mylar tape and foam gasket covering the temp sensor. Disconnect the display temp sensor cable from the sensor. Note Use a black stick to pry the sensor from the top of panel.

Replacing the Logic Board

If you removed the logic board to access another module, reinstall the board as is. However, if you are replacing the logic board with a new one, notice that a replacement logic board does not include the video card, memory, audio board, AirPort Extreme card, Bluetooth card, or IR components. Make sure these parts are transferred to the new logic board before closing up the computer. 2. Note On all replacement logic boards a piece of EMI tape is included in the box with the logic board....

Isopropyl Alcohol IPA

In the unfortunate event that gloves are not worn, and fingerprints and oil smudges are visible on the inside of the glass, cleaning should be done using a lint free cloth and IPA. Spray a small amount of IPA onto a CLEAN lint free cloth to avoid introducing any other contaminants. Gently wipe the area and allow the glass to dry. Note The silicone rollers are only effective in removing dust and other particles. If fingerprints or oil smudges are not removed prior to using the roller, the...

Builtin iSight Camera

The built-in camera is not recognized. 1. Boot the computer to the desktop and launch iChat AV. Note You do not need to be connected to a network to use iChat AV to troubleshoot. Verify that the correct versions of Mac OS X and iChat AV are installed. Reinstall or update software as needed. 2. Open the iChat AV preferences and click on the 'Video' icon. Verify whether the camera is recognized by the iChat AV software. Is the camera recognized Yes the camera is recognized and video preview is...

Take Apart

General Information 7 Product View 7 Opening the Computer 7 Note About Images in This Manual 7 Serial Number Location 8 General Tools 9 Required Special Tools 9 View of the Main Modules 11 View of the Rear Housing and Cables 11 Back View 12 I O Ports 13 Cleaning and Handling the Glass Panel 14 Cleaning and Handling of the Glass Panel 24 Removing the Glass Panel 27 Replacing the Glass Panel 30 Installing a Replacement Glass Panel 35 Clutch Mechanism 167 Chassis 172 AC Power Inlet 177 Camera...

Replacing the Camera Board

Connect the camera cable to the camera board. Reapply the kapton tape over the cable and connector. 2. Lower the camera bracket onto the black posts on the rear cover. 5. Clean and replace the glass panel. Note This step is very important. Follow the procedures to ensure the glass is clean and free of particles.

Removing the Display Panel

Place the computer with the display face up. 2. Remove the two T6 screws from the LVDS connector. Pull the black tab on the cable, or grasp the connector by the edges to disconnect it from the logic board. 3. Disconnect the display sensor cable from the left side of the logic board. 3. Disconnect the display sensor cable from the left side of the logic board. 4. Remove the eight T8 screws from the sides of the panel frame. 4. Remove the eight T8 screws from the sides of the panel frame. 5....

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...

Replacing the Ambient Temperature Sensor

Thermal Sensor Apple

Replacement Note If you are replacing the CPU fan transfer the sensor and the sensor cable to the replacement fan. 2. Lower the fan into the rear housing. Press the foam gasket into place across the top of the fan. 3. Connect the temperature sensor cable and the fan cable to the logic board. 3. Connect the temperature sensor cable and the fan cable to the logic board. 6. Clean and replace the glass panel. Note This step is very important. Follow the procedures to ensure the glass is clean...

Speakers

Disconnect any external microphones, speakers, or headphones. 2. Access System Preferences and select Sound. In the Sound pane, select Output and make sure the Internal speakers are selected as the device for sound output, the Output volume is adequate, and Mute is not selected. Do you have sound now Yes Problem resolved. No Go to the next step. 3. Reset parameter RAM. Press Command-Option-P-R during startup but before Welcome to Macintosh appears. Do you have sound now Yes Problem resolved....

Replacing the Air Port Extreme Card

Align the AirPort Extreme card with the slot on the logic board. Insert the board into the slot. 2. Connect the antenna cables to the connectors on the AirPort Extreme card. 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. 4. Clean and replace the glass panel. Note This step is very important. Follow the procedures to ensure the glass is...

How to Reset the System Management Controller SMC

The System Management Controller SMC is a chip on the logic board that controls all power functions for your computer. If your computer is experiencing any power issue, resetting the SMC may resolve it. The SMC controls several functions, including Telling the computer when to turn on, turn off, sleep, wake, idle, and so forth. Handling system resets from various commands. Note that resetting the SMC does not reset the PRAM. Resetting the SMC will not resolve issues in which your computer is...

Removing the LVDS Cable

With the display face down on a soft cloth, peel up the two strips of black tape from the LVDS cable on the back of the display panel. 2. Press in on the LVDS connector lock release clips 1 and gently pull 2 to disconnect the LVDS cable from the back of the panel. 3. Lift the LVDS cable from the display panel. 3. Lift the LVDS cable from the display panel.

Replacing the ACDC 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 m l 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...

Replacing the Camera Cable

Route the camera cable into the rear housing. 2. Tape the camera cable to the rear housing. Replace the piece of EMI tape at the top, covering the exposed piece of cable. 3. Replace the chassis screws. Note The three screws at the top have a flatter head. 6. Replace the optical drive, flex drive cable and screws, and optical drive sensor cable. 11. Clean and replace the glass panel. Note This step is very important. Follow the procedures to ensure the glass is clean and free of particles.

Replacing the Bluetooth Card

Imac Logic Board Lcd Connection

Press the Bluetooth card onto the logic board connector. 2. Connect the Bluetooth antenna to the Bluetooth card. 3. Replace the two T6 Bluetooth card screws. 5. Clean and replace the glass panel. Note This step is very important. Follow the procedures to ensure the glass is clean and free of particles.

Replacing the Optical Drive

Caution Never press down on or grasp the body of the optical drive when installing it. Pressing or squeezing the body of the optical drive could damage the drive mechanism. 1. Install the flex cable onto the optical drive with two T6 screws. 2. Insert the optical drive bezel into the rear housing, lining up the bezel with the slot opening. 3. Replace the two T8 optical drive screws. 4. Replace the EMI mesh tape. Important Make sure the EMI mesh tape does not cover any of the slot-load opening...

Cleaning and Handling the Glass Panel

A The Mac 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. Removing the glass panel requires special tools such as lint-free gloves, rubber suction cups, microfoam storage bags, and the iKIear cleaning solution. The glass panel must be removed prior to replacing any module other than the SO-DIMM's. To prevent...

Removing the Front Bezel

Place the computer on a soft protective lint-free surface such as a very clean ESD mat to avoid damaging the finish on the stand or rear housing. 2. Position the computer on the rear cover with the stand facing you. 3. Remove the twelve screws around the bezel. Replacement Note Refer to the photo when replacing the screws. 4. With the upper corners loosened, lift up but do not remove the bezel. 4. With the upper corners loosened, lift up but do not remove the bezel. 5. Notice the connected...

Display

When displaying a single color over the screen area, the LCD panel shows one or more pixels that are not properly lit. Active-matrix LCD technology uses rows and columns of addressable locations pixels that render text and images on screen. Each pixel location has three separate subpixels red, green, and blue that allow the image to be rendered in full color. Each subpixel has a corresponding transistor responsible for turning the subpixel on or off. There are typically millions of these...

Replacing the LVDS Cable

Connect the LVDS cable to the rear of the display panel. 2. Replace the clear Kapton tape over the LVDS cable connector. 3. Connect the inverter cable to the inverter board on the rear of the panel. Cover the cable and connector with the sticky, black mylar tape. 4. Lower the display into the rear housing. 5. Connect the other end of the inverter cable to the power supply. 6. Connect the LVDS cable to the logic board. Replace the two T6 screws. 7. Connect the LCD temp sensor cable to the...

Power On Self Test POST

Intel-based Mac computers such as the iMac 24-inch 2007 rely on a combination of tones and blinking LEDs to display Power On Self Test POST error codes. If the computer detects out-of-specification or no SDRAM or the RAM installed does not meet the appropriate specifications, the screen will remain black but the computer will beep. This error condition may be due to physically damaged RAM, installing the incorrect type of RAM, or not having RAM installed. Some RAM may appear to pass the...

Replacing the Hard Drive

How Install Temp Sensor Cpu

If you are installing a new hard drive, transfer the screws, clip, and temperature sensor cable to the replacement drive. 2. Position the drive into the chassis lining up the two pins on the side of the hard drive with the two holes in the chassis. 3. Connect the hard drive data and power cables to the hard drive. 3. Connect the hard drive data and power cables to the hard drive. 4. Press the hard drive the rest of the way into the rear housing. You will hear a snap when the black plastic...

Serial Number Location

Apple Serial

On the bottom of your iMac stand, you'll find a label with the serial number printed on it. 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...

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...

Installing a Replacement Glass Panel

Clean Dust From Inside Lcd Panel

Note Fewer dust particles will settle on the LCD panel with the computer in the vertical position. 2. Roll the sticky silicone roller over the LCD panel to remove any particles. 3. Remove the new glass panel from the service packaging. Note The new panels have a removable film protecting the glass on both sides. 4. Place the glass on a clean microfoam bag with the inside of the glass facing up the side with metal pins. Wearing gloves, carefully remove the...

Removing the Optical Drive

Warning When servicing the optical drive, handle it by the edges only. Pressing elsewhere on the drive could damage its internal mechanism. 1. Note the sensor cable routing under the optical flex cable board. Remove the two T8 screws. 2. Carefully peel back the strip of EMI mesh tape that anchors the bezel end of the drive to the rear cover. 3. Tilt up the optical drive, remove the two T6 screws on the flex cable board. Remove the flex cable board from the optical drive. 4. Disconnect the...

Diagnostic LEDs

Imac 24inch Diagnostic Led

The iMac 24-inch 2007 has four built-in diagnostic LEDs on the main logic board that can help you to troubleshoot the computer. The four LEDs are located to the right of the memory slot. It may be necessary to carefully move the hard drive data cable to view the LEDs. 1. Follow the take apart instructions to remove the memory access door and front bezel. 2. The four troubleshooting LEDs 1, 2, 3, and 4 numbered bottom to top are in a column located to the right of the memory slot. Move the hard...

Cleaning Tools Starter

The following tools are offered in the starter kit 076-1277 . Sticky silicone roller 6-inch to clean the glass panel Sticky sheets to clean the silicone roller, 2 pads Polishing cloths, clean, anti-static, microfiber terry style cloth 5 cloths Gloves, lint-free, anti-static, two pairs Microfoam bag to store the glass panel 5 bags ESD bag for LCD display storage, 5 bags

Replacing the Glass Panel

How Clean Sticky Hand Silicon

Put on a pair of clean gloves with the rubberized-side of the gloves on the palm side of your hand. 2. Install the LCD display panel onto the computer if it was removed. 3. Replace the font bezel if it was removed, connect the microphone cable and replace the bezel screws. 4. Locate the sticky silicone roller and the dust removal pad. Remove the protective covering on the silicone roller and peel the protective cover off the dust removal pad. 5. Holding the sticky paper with your free hand,...

Removing the Stand

Removing The Stand From Imac

Place the computer face down on a table so that the base of the stand extends over the table edge. Press the stand down and insert an access card into the slot between the top of the stand and the rear housing. 2. Insert the card as far as it will go, and press the stand down until you hear a click the audible cue that tells you that the stand is locked into place. Remove the access card, and remove the eight T10 clutch-to-stand screws. 4. Separate the stand from the clutch mechanism and...

Removing the Hard Drive

Changing Hdd Fuse

Disconnect the hard drive temperature sensor cable from the top of the logic board. 2. Push HARD and toward the logic board on the black plastic clip at the top of the hard drive to release it from the chassis. 3. Disconnect the power and data cables from right side of the hard drive. 3. Disconnect the power and data cables from right side of the hard drive. 4. Lift the hard drive from the computer assembly. 5. If you are replacing the hard drive continue with the procedure. Remove the...

Replacing the Temp Sensor Cable

Mylar Tape Imac Display

Connect the LCD temp sensor cable to the sensor at the top of the panel. Place the foam gasket on top of the sensor. 2. Route the cable along the right side on the back of the panel. Press the black sticky insulator over the top of the cable and the sensor. Replace any clear tape holding the cable in place on the panel 3. Connect the inverter cable to the inverter board on the rear of the display panel. Replace the black mylar tape over the inverter cable connector. 4. Make sure the other...

Fan Sound

Imac Replacement Lower Cooling Fan

Fans running at full speed after the computer turns on The customer may have entered a diagnostic mode that causes the fans to run at full speed. Restarting the system will not restore normal fan operation. To solve the problem, the user or technician should do the following 2. Disconnect the power cord and wait 15 seconds. 3. Reconnect the power cord and wait 5 seconds. Note Customers reporting this symptom should be told to press the power button AFTER the power cord has been fully inserted....

Keyboard

Certain keys or none of the keys on the keyboard function. 1. Unplug all devices from your computer, including your mouse and keyboard as well as printer, scanner, external hard drives, and hubs. Warning Some devices may require you to perform steps before it is safe to unplug them, e.g., external storage devices. Be sure to unplug your hub, if you have one. 2. Plug your keyboard into the back of your computer firmly and securely. Plug your mouse into the back of your computer firmly and...

Replacing the Front Bezel

Bezel Imac

Place the computer on a soft protective lint-free surface such as a very clean ESD mat to avoid damaging the finish on the stand or rear housing. 2. Position the computer on the rear cover with the stand facing you. 3. Position the bottom of the front bezel over the bottom edge of the rear cover. 4. Lower the front bezel, connect the microphone cable to the extension cable and tuck the cable into the computer housing. Carefully lower the bezel onto the computer, and make sure the cable...

Replacing the AC Power Inlet

Position the AC power inlet into the rear housing. 2. Route the AC power inlet cable under the chassis and up through the hole in the chassis. 4. Route the ground cable through the opening in the chassis. Replace the four AC inlet screws. Attach the ground cable to the chassis with the short machine screw. 5. Replace the power supply, and connect the AC power inlet cable.

Replacing the Video Card

Replacing Imac Video Card

Connect the video card to the logic board, lining up the gold fingers on the card with the video card slot on the logic board. 2. Install the three screws and connect the sensor cable to the logic board. Replacement Note The shorter screw attaches at the far right end of the video card heatsink. 7. Clean and replace the glass panel. Note This step is very important. Follow the procedures to ensure the glass is clean and free of particles.

Passed Apple Service Diagnostic Still Can T Boot

CDs or DVDs don't show up on the Desktop. 1. Select Preferences from the Finder menu and make sure the option to show CDs, DVDs and iPods is checked in the General window as shown below. Show these items on the Desktop 5 Hard disks 5 CDs, DVDs, and iPods Connected servers '_I Always open folders in a new window 53 Spring-loaded folders and windows Delay Press Space B-ar to open immediateiy 2. Select System Preferences from the Apple menu and open the CDs amp DVDs preferences window. Make sure...

Replacing the Stand

Imac Stand Unlocking Mechanism

Align the pin on the clutch mechanism to the central hole in the stand. 2. Position the stand on the clutch mechanism. Install the eight mounting screws. 3. Place the computer face down on a table so that the base of the stand extends over the table edge. Press the stand down and insert an access card into the slot between the top of the stand and the rear housing. 4. Insert the access card as far as it will go. Gently lift the stand approximately two inches to unlock the clutch mechanism,...

Replacing the Power Supply Cable

Power Mac Power Supply Repair

Install the power supply cable into the rear housing as shown below. Position the cable between the black guide posts on the rear housing. 2. Replace any kapton tape securing the cable to the rear housing. 8. Replace the optical drive, flex drive cable and screws, and optical drive sensor cable. 13. Clean and replace the glass panel. Note This step is very important. Follow the procedures to ensure the glass is clean and free of particles.

Removing the ACDC Power Supply

Imac 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 Mwhen troubleshooting the system with the front bezel removed. W J 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...

Removing the Glass Panel

Remove Imac Glass Panel

Apple 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. 2. Position the computer on the rear cover, on a soft protective lint-free surface, with the stand facing you 3. Clean off the suction cups, making sure they are free of contaminants. It may be necessary to wash the suction...

Hard Drive

Flashing question mark, or an alternating question mark and Mac OS face or a folder Note When troubleshooting hard drive problems it is a good idea, if possible, to back up any important data. Some troubleshooting steps may require erasing the contents of the hard drive. 1. Boot from the system CD that came with the computer, and open Disk Utility. Does the hard drive show in Disk Utility Yes Run Repair Disk and Repair Permissions to correct any directory and permissions issues. Go on to Step...

Replacing the CPU

Imac Processor Upgrade

Lower the fan onto the guide posts in the rear housing. Push it down onto the posts. 2. Press the foam gasket into place at the top of the fan. 3. Connect the ambient temp sensor cable and the fan cable to the logic board connectors. 3. Connect the ambient temp sensor cable and the fan cable to the logic board connectors. 7. Clean and replace the glass panel. Note This step is very important. Follow the procedures to ensure the glass is clean and free of particles.

Removing the Microphone Cable

Microphone Wire Top

Lift the chassis off the rear housing. 2. At the top of the rear cover, peel back the tape that secures the cable onto the chassis. 2. At the top of the rear cover, peel back the tape that secures the cable onto the chassis. 3. Near the middle of the rear housing, remove the two T8 screws on the cable guide 4. Remove any tape securing the camera cable to the rear housing. Lift the camera cable from the rear housing.

Required Special Tools

Special tools are required to remove, handle, and clean the glass panel such as the following. These are available as a starter kit too. View the tools in the Glass Panel take apart chapter. 1. 922-8252 Suction cups, Pkg. of 2 2. 922-8261 Sticky silicone roller 6-inch to clean the glass panel 3. 922-8262 Sticky sheet pads to clean the silicone roller 4. 922-8263 Polishing cloths, clean, anti-static, optical grade micro fiber terry style cloth 5. 922-8253 Gloves, lint-free, anti-static, Pkg. of...

IMac inch Upper Exploded View

Hard Disk Drive Exploded View

Cable, Optical Temp S e n sor 922-8222 Clip, Temp Sensor, Pkg of 5 922-8183 Hard Drive 661-4382 3.5, 320 GB, 7200 661-4383 3.5, 500 GB 7200 661-4384 3.5, 750 GB, 7200 Power Supply 661-4422 240W Pressure Wall 661-4478 250 Pressure Wall Foam Clip, Temp Sensor, Pkg of 5 922-8183 Hard Drive 661-4382 3.5, 320 GB, 7200 661-4383 3.5, 500 GB 7200 661-4384 3.5, 750 GB, 7200 Optical Drive 661-4385 Super Drive, 8x, Slot Optical Drive 661-4385 Super Drive, 8x, Slot Audio Cable, Flexible Not Shown 922-8161

IMac inch Lower Exploded View

Video Card Imac

Video Card 661-4426 ATI Radeon HD 2600 Pro, 256 MB Not Shown Sensor, Ambient Temp 922-7792 Camera Cable 922-8158 Cable, AC DC SATA Power 922-8157 Video Card 661-4426 ATI Radeon HD 2600 Pro, 256 MB Cable, AC DC SATA Power 922-8157 661-4428 2.4 GHz, Core 2 Duo 661-4430 2.8 GHz, Core 2 Duo 661-4424 1 GB, DDR2 667, SO-DIMM 661-4225 2 GB, DDR2, 667, SO-DIMM Mouse, Mighty Mouse, Wired Short 661-4406 Mouse, Mighty Mouse, Wireless 661-4407 661-4424 1 GB, DDR2 667, SO-DIMM 661-4225 2 GB, DDR2, 667,...

Imac 24 No Video

The computer will turn on indicated by the front LED ON , but there is NO boot chime and No Video on the display. The faint sound of the fans, hard drive, and optical drive may also be heard. 1. Follow instructions in the General Information chapter to reset the SMC. Does the computer display video after successfully resetting the SMC 2. Verify that only supported SDRAM memory has been installed and that it has been installed correctly. Unsupported and or defective memory can prevent the...