Replacing the ACDC Power Supply

AWARNING 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 (Early 2006) system that is plugged in.This will help ensure that your body does not provide a...

Replacing the Clutch Mechanism

How Factory Reset Imac

Make sure the stand is upright, and the end of the stand is inserted through the mounting hole in the rear housing. 2. Position the clutch on the stand, with the clutch springs at bottom. Install the eight long, clutch-to-stand mounting screws. 3. Adjust the clutch so that its chassis mounting holes align, and install the four screws that secure the clutch to the chassis. 4. Replace the mesh tape on top of the mechanism, press it into place. 5. Replace the metal clutch cover. 12. Place the...

Replacing the Stand

Pied Support Imac Pouces

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. Insert the access card as far as it will go. Gently lift the stand approximately two inches to unlock the clutch mechanism, and...

Replacing the Right Speaker

Tuck the speaker cable between the CPU fan and the logic board, and connect the speaker cable to the logic board. 2. Install the speaker in the computer assembly. 3. Secure the right speaker with the mounting screw, and reapply the EMI tape. UltT 3. Secure the right speaker with the mounting screw, and reapply the EMI tape. UltT

Removing the Stand

Imac Stand Removal Card

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. 3. Remove the access card, and remove the eight T10 clutch-to-stand screws. 4. Separate the stand from the clutch mechanism and...

Replacing the Air Port Antennas

Insert the antenna connector end of the cables through the opening in the EMI shielding. 2. Secure the noninsulated section of the cables to the EMI shielding with the single strip of aluminum tape. 3. Follow the removal instructions in reverse to route the antenna cables up the right side of the rear cover and underneath the EMI shielding. 4. When securing the right antenna board, make sure the edge of the board fits directly beside the vertical ridge on the rear cover. 5. When securing the...

Removing the Video Card

Remove the two 8-mm long machine screws. Be sure to retain these screws for reinstallation. 3. Tilt up the video card with attached heatsink, and disconnect it from the card connector on the logic board. 5. Be sure to retain the two plastic spacers on the video card area of the logic board. 6. Note that a replacement video card includes a temperature sensor and cable. Make sure these are pre-installed on the card before you replace the video card. The sensor cable runs under the foam strip.

Bluetooth

Bluetooth devices won't sync with my computer 1. Make sure the computer has a Bluetooth board installed. Open System Preferences from the Apple menu, choose System Preferences and verify that Bluetooth appears in the Hardware section of the window. 2. Locate the Bluetooth board inside the computer. Reseat the Bluetooth board and the Bluetooth antenna. 3 Turn on Bluetooth. In System Preferences, click Bluetooth and then click the Settings tab. If you don't see Bluetooth Power On, click the Turn...

Removing the Camera Board

The camera board and cables are visible as you lift the front bezel off the computer. 2. Disconnect the camera and microphone cables. 3. With a black stick, peel up the tape that runs the length of the camera board. 3. With a black stick, peel up the tape that runs the length of the camera board. With your fingernail or a black stick, lift up the With your fingernail or a black stick, lift up the 6. Remove the camera board from the front bezel.

Replacing the Camera Board

Position the camera board in the plastic bracket. Make sure the flex cable is not pinched as you install the board. 2. Snap the board into the mounting bracket and lock the flex cable connector. 3. Connect the camera and microphone cables. 4. Reapply the tape across the length of the camera board. 5. Tuck the camera board cables neatly into the channel on the rear housing. 6. Holding the memory ejector levers closed, lower the font bezel down. 7. Replace the bezel screws along the bottom of...

Power On Self Test POST

Intel-based Mac computers such as the iMac 24-inch 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 power LED on the front of the computer will blink once per second to signal the error. This error condition may be due to physically damaged RAM, installing the incorrect type of RAM, or not...

Removing the Ambient Temperature Sensor

Imac Ambient Temperature Sensor Location

Disconnect the ambient temperature sensor cable from the sensor board. 2. Check the position of the ambient temperature sensor on the left speaker. Use a permanent ink marker to draw an outline of the sensor. 3. Use a black stick to peel up the sensor from the adhesive on the side of the speaker. 3. Use a black stick to peel up the sensor from the adhesive on the side of the speaker.

Removing the IR Board

Laserwriter 8500

Remove the two T6 screws from the top outer corners of the IR and ALS board. Set aside the square ALS board. 2. Tilt out the IR board, and disconnect the IR ALS cable from the IR board. Lift the IR board from its IR shield. 3. Remove the IR board from the IR shield and logic board. 3. Remove the IR board from the IR shield and logic board.

Removing the Display Panel

Tilting Display Panel

Place the computer with the display face up. 2. Remove the two T6 screws from the LVDS connector. 4. Remove the eight 8-mm long T8 screws from the sides of the panel frame. 4. Remove the eight 8-mm long T8 screws from the sides of the panel frame. 5. Peel up the strip of tape at the lower corners of the LCD panel. 5. Peel up the strip of tape at the lower corners of the LCD panel. 6. Grasp the LCD panel at the bottom edge, and tilt up the panel to remove it from the computer assembly. 7....

Removing the Front Bezel

Place the computer on the rear cover with the stand facing you. 2. Tilt up the front bezel and remove the four screws along the bottom. 3. While holding the memory card levers closed not protruding from the access door opening , start tilting up the lower end of the bezel. 4. With the lower corners loosened, lift up but do not remove the bezel. Caution To prevent LCD panel damage, never press on the display face. 5. Lift up the top of the bezel and notice the connected microphone and camera...

Removing the CPU

Remove the left speaker screw and peel up the EMI tape at the lower corner of the speaker. 3. Disconnect the fan cable from the lower left corner of the logic board. 3. Disconnect the fan cable from the lower left corner of the logic board. 4. Pull out the fan from the guide posts on the rear cover.

Removing the Bluetooth Antenna

Note that only the cable end of the Bluetooth antenna is visible as it exits the EMI shielding. 2. Disconnect the antenna from the Bluetooth board. 4. Open the sleeve of the EMI backing to access the rest of the antenna cable. 4. Open the sleeve of the EMI backing to access the rest of the antenna cable. 5. Use a black stick to pry up the rectangular end of the antenna from the rear housing. Pull the remaining antenna cable through the opening in the EMI sleeve. 6. Remove the Bluetooth...

Replacing the Air Port Extreme Card

Airport Extreme Change Fuse

See the following section on compatibility to order the replacement part by EEE code. 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. 3. Align the AirPort Extreme card with the slot on the logic board. Insert the board into the slot. 4. Replace the two AirPort Extreme card screws.

Removing the ACDC Power Supply

AWARNING 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 24-inch system that is plugged in.This will help ensure that your body does not provide a path...

IR Sensor Receiver

Supported applications do not respond to input from the remote control. 1. Perform the checks above under IR Remote to verify that the Apple Remote is functioning correctly, and retest. Do supported applications now respond to input from the IR remote Yes Problem resolved. 2. Verify that the IR Sensor can be seen in the Apple System Profiler. Open the Apple System Profiler and click on the USB section. You should see the following listed Manufacturer Product ID Vendor ID. Up to 12 Mb amp ec...

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...

Removing the Optical Drive

Note the location of the two fan guide posts, right and left. The right post may be obscured by the speaker cable however you do not have to discconnect the speaker cable to remove the fan. 2. Disconnect the fan cable from the logic board. 3. Holding the top edge of the fan, pull the body of the fan off of the guide posts on the rear cover.

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...

Air Port

Not able to connect wirelessly with AirPort 1. From the Apple menu, choose About this Mac. 2- Click on More Info. System Profiler should open. 3- In System Profiler, in the column on the left, look under Network for a line called AirPort Card Select that line. 4- Does the section to the right say No Information Found Yes The computer doesn't realize it has an AirPort card installed. Go to step. 5 No The iMac recognizes that it has an AirPort card installed. Go to step 6. 5- Remove the access...

Imac Monitor Rotating Colors At Power

No Video, No Boot Chime, White LED ON Symptom 1 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....

Removing the Inverter Cable

Inverter Cinema Display

With the computer face down on a soft cloth, peel up the strips of tape that cover the inverter cable and connector on the back of the display panel. 2. Grasp the inverter cable close to the connector and disconnect it from the inverter board. 2. Grasp the inverter cable close to the connector and disconnect it from the inverter board. 3. Lift the inverter cable from the display panel. 3. Lift the inverter cable from the display panel. 1. Connect the inverter cable to the inverter board on...

Removing the Air Port Extreme Card

Airport Card Imac

Remove the 26-mm long screw from the right speaker, and peel up the EMI tape from the lower right corner of the speaker. 3. Using a T6 torx screwdriver, remove the two 5-mm long screws and disconnect the two antenna cables from the AirPort Extreme card. 5. Holding the card by the edges, pull the AirPort Extreme card out of the slot, and disconnect the antenna cables.

Imac 24 Inch Remote Sensor Location

Remote won't communicate with system applications such as iTunes or iPhoto, or with the optical drive. Make sure of the following when using the Apple Remote You are within 30 feet of the front of the computer. You have an unobstructed line-of-sight to the front of the computer. You are pointing the lens end of the Apple Remote directly at the front of the computer. The computer is powered on and awake. The Disable remote control infrared receiver checkbox in the Security pane of System...

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...

Power Issues

The display remains black and there are no sounds from the fans or drives. 1. Verify the power outlet is good. Plug a different device into the socket to ensure there is power, or plug the iMac into another outlet. Does the iMac power on now 2. Check the power cord. Use a known good power cord. Does the iMac power on now Yes Your power cord has failed. Replace the AC power cord. No Go on to the next step. 3. Check the connection of the power cord on both ends....

Diagnostic LEDs

Imac Diagnostic Leds

The Mac 24-inch has four built-in diagnostic LEDs and a front LED on the main logic board that can help you to troubleshoot the computer. The four LEDs are located to the right of the memory 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. Peel back the tape to view the LEDs. An additional front LED is located in an opening at the...

Optical Drive

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. 2. Select System Preferences from the Apple menu and open the CDs amp DVDs preferences window. Make sure that audio CDs are set to launch iTunes and movie DVDs set to launch DVD Player when those media are inserted, as shown below. 3. Check that the drive can read discs normally. Insert an audio CD and check...

Removing the Bluetooth Card

Bluetooth Card

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. Note There is no need to disconnect the inverter cable to remove the Bluetooth card. 2. Lift the card from underneath the inverter cable and off of the logic board. 2. Lift the card from underneath the inverter cable and off of the logic board. 3. Disconnect the Bluetooth antenna from the left side of the card.

Removing the Optical Temperature Sensor

Optical Sensor Temperatura Macbook

Warning Handle the optical drive at the side edges only. Do not touch or press anywhere else on the drive. 1. With the optical drive removed, check the position of the temperature sensor. Use a permanent ink marker to draw an outline of the sensor location. Refer to that marking when placing the sensor on a new optical drive. 2. Use a black stick to peel up the temperature sensor from the adhesive on the bottom of the drive.

Removing the AC Power Inlet

Note the cable routing between the chassis frame and the rear cover. 2. Using a torx T10 screwdriver, remove the three 7-5-mm long self-tapping screws from the power inlet and the 5-mm long machine screw from the ground cable . Remove the EMI tape on the metal case. 3. Route the cable out from under the chassis, and remove the AC power inlet. 1. Install the AC power inlet on the rear housing screw mounts with three self-tapping screws. 2. Install the power inlet ground cable to the chassis...

Fan Sound

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....

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...

Mouse

Turn over the mouse and check the if the red LED on the underside of the mouse. Is the LED lit Yes The mouse has power. Try using the mouse on another surface. Non-reflective, opaque surfaces without repetitive patterns work best. The surface should be clean, but not shiny. Optical mice won't work on glass, mirrored surfaces, glossy materials or mouse pads with pictures. No There is no power to the mouse. Try plugging the mouse into one of the USB ports on the machine. If the mouse won't...

Removing the Left Speaker

How Remove Imac Logic Board

Using a T10 torx screwdriver, remove the 38-mm long screw from the left speaker. Replacement Note The longer of the two speaker mounting screws is used to secure the left speaker the shorter 26-mm long screw secures the right speaker. 2. Peel up the EMI shield and tape from the left side and lower left corner of the speaker. 3. Loosen the speaker from the computer assembly. 3. Loosen the speaker from the computer assembly. 6. Note that the left speaker cable runs under the length of the...

Removing the LVDS Cable

Imac Replace Lvds Cable

With the computer face down on a soft cloth, peel up the strips of tape from the LVDS cable on the back of the display panel. 2. Press in on the cable clips and then pull straight down on the cable to disconnect the LVDS connector. 3. Lift the LVDS cable from the display panel. 1. Connect the LVDS cable to the rear of the display panel. 1. Connect the LVDS cable to the rear of the display panel. 2. Replace the tape over the LVDS cable connector. 3. With both the LVDS cable and the inverter...

Replacing the Ambient Temperature Sensor

Replacement Note If you are replacing the left speaker, use a permanent ink pen to mark the sensor area as a reference before installing the sensor. Note A replacement left speaker includes the attached cable and gasket, but not the sensor. 2. Install the sticky side of the sensor on the speaker within the outlined marking. 3. Connect the temperature sensor cable.

Replacing the Logic Board

Imac White Board

See the following section on compatibility to order the replacement part by EEE code. 2. 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, AirPort Extreme card, Bluetooth card, or IR ALS components. Make sure these parts are transferred to the new logic board before closing up the computer. 3. Check the board for two...

General Information

Serial Number Underneath The Stand Imac

The optical drive removal procedure has been updated. Using a screwdriver to release the optical drive tabs is causing damage to the logic board. The updated procedure shows how to remove the optical drive using a needlenose pliers. Additional information on handling slot-load optical drives can be referenced in Kbase article 305282. Updated Clutch Mechanism and Stand sections in Take Apart to show how to unlock the clutch mechanism. Updated Upper Exploded View and created hyperlink to EEE...

Checking Compatibility between Logic Board and Air Port Card

Logic Board Eee Code

The iMac Late 2006 computers were built with a number of logic boards and AirPort Extreme cards. To avoid confusion identifying the correct logic board and AirPort Extreme card for the system, refer to the table in this section which lists the corresponding EEE codes. To locate the EEE code on the AirPort Extreme card, remove the card from the logic board. Turn the card over, and look for the representative EEE code within the card s serial number. Locate the last four digits in the serial...

Keyboard

Diagram Wiring Gt128

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...