Apple G5 Logic Board

iMac G5 (20-inch iSight) Take Apart —Logic Board 86

Logic Board

Tools

Torx T10 screwdriver•

Preliminary Steps

Before you begin, remove the following:

A• ccess door

F• ront bezel

Lower EMI shiel• d

Display Pane• l

Speaker• s

Part Location

Contents

Main iMac G5 (20-inch, iSight) Contents Take Apart Troubleshooting Views Screw Chart 181 Page General Information Product View Whats New Tools Required Orientation Serial Number Location Safety Opening the Computer Access Tool Modication Page Page EMI Shielding Page Page Page Access Door Page Front Bezel Removing the Front Bezel Page Page Page Page Page Page Page Page Page Page Page Page Lower EMI Shield Page Page Replacing the Lower EMI Shield IR Board Page Page Page Page LCD Display Panel Page Page Page Page Page Page Replacing the Display Panel Memory Removing the Memory Page Speakers Page Page Page Page Page AirPort Extreme/Bluetooth Card Page Replacing the AirPort Extreme/Bluetooth Card Optical Drive Page Page Page Page Page Replacing the Optical Drive Page Page Page Page Page Hard Drive Page Page Page Page Page Page Power Supply, AC/DC Removing the AC/DC Power Supply Page Replacing the AC/DC Power Supply Page Page Logic Board Page Page Page Page Page Replacing the Logic Board Page Page Page Page AC Line Filter Page Page Replacing the AC Line Filter Fan, Hard Drive Page Page Page Fan, Optical Drive Page Replacing the Optical Drive Fan Fan, CPU Page Replacing the CPU Fan Power Supply, DC/DC, Inverter Page Replacing the DC/DC Power Supply/Inverter Ambient Light Sensor Board Page Replace the Ambient Light Sensor Board Cable, Camera and IR Page Replacing the Camera and IR Cable Wireless Antenna Page Page Replacing the Wireless Antenna Cable Clutch Page Page Replacing the Clutch Chassis Page Replace the Chassis Rear Housing Page Replace the Rear Housing Stand Page Replacing the Stand Page Page General Information Page Page Page Page Page Testing Under Power SMU (System Management Unit) Resetting the SMU (System Management Unit) Page Symptom Charts How to Use the Symptom Charts Power Issues No Power. Page Page Audible buzzing, whining, or ticking noise Verbose Startup Mode No Video Page Display is tinted another color. Display Hard Drive Flashing question mark, or an alternating question mark and Mac OS (face or a folder) System hangs during normal startup process Page Page The computer wont burn discs. Discs wont insert. Optical disc constantly ejects Fan Sound Loud fan noise coming from inside the computer Page Fans are running at a constant high speed AirPort/Bluetooth Not able to connect wirelessly with AirPort or Bluetooth AirPort signal seems to be very weak IR Remote IR Sensor/Receiver Supported applications do not respond to input from the remote control. Built-in iSight Camera The built-in camera is not recognized. Camera recognized but no video. Camera image quality poor. Camera recognized but no audio Audio Quality Poor Speakers Cant hear sound from the speakers. I hear sound out of only one speaker. Mouse My mouse doesnt work at all. My mouse works intermittently (the cursor freezes randomly). The mouse is slow to respond. Keyboard None of the keys on my keyboard work. Certain keys dont work. My keys are sticky or slow to respond. When I type, strange characters appear on the screen. The USB port on my keyboard doesnt work. Error Beep(s) Computer beeps at startup. USB A USB device doesnt work I see a message saying not enough power to function. Page iMac G5 (20-inch iSight) Views 179 iMac G5 (20-inch iSight)Upper Exploded View iMac G5 (20-inch iSight)Lower Exploded View Screw Chart iMac (iSight 20-inch) Screws page 1 iMac (iSight 20-inch) Screws page 2