Apple Powerbank G4

38 - PowerBook G4 (17-inch) Troubleshooting Hardware Symptom Charts

8. Shut down system.

9. Replace sound board.

10. Replace logic board.

Contents

Main Page General Information New Procedures Overview Important Notes Tools Page Zero Insertion Force Connectors To release the ex cable To connect a ex cable Battery Page Page Page Page Page Page Page Top Case Page Page Page Page Replacement Procedure Page Page Page Page Page Page Page Page Page Page Page Page Keyboard Page Page Page Page Replacement Procedure Page Page Page Hard Drive Page Page Sound Board Page Page SuperDrive Page Page Backup Battery Board Page Modem Page Page Page Page Page Page Page Bluetooth Page Page Speakers Page Page DC-In Board Page Page Page Logic Board Page Page Page Page Page Page Page Page Page Page Page Display Panel Assembly Page Page Page Page Page Page Page Page Page Page Page Page Heatsink and Fan Assembly Page Bottom Case Assembly Part Location Page Page General Information Wire and Flex Cables Page Page Page Page Hardware Troubleshooting Tools and Tips Apple Hardware Test 2.0.1 (AHT) Apple Service Diagnostic (ASD) Page Resetting the Power Manager Unit (PMU) Power-on pads on logic board PMU NMI and PMU Reset pads on logic board Caps lock LED power check Software Troubleshooting Tips and T ools Mac OS X only Login window and account Customer forgot password Safe Mode Page Hardware Symptom Charts How to Use the Symptom Charts Power Adapter Note Startup The computer will not power on (no fan movement, hard drive spin up and display is not lit) Memory error message The built-in memory test has detected an error appears on the screen Page Flashing question mark appears on the screen System shuts down intermittently System shuts down almost immediately after startup Application Quits, Kernel panic or other booting problems Error Beeps Computer beeps once at startup Computer beeps twice at startup Computer beeps three times at startup Computer beeps four times at startup AirPort Extreme Card AirPort Extreme Card not recognized AirPort connection is slow Battery Battery will not eject The battery won't charge Bluetooth Bluetooth system preferences does not show up under Hardware system preferences Bluetooth Card not recognized by other devices Display Display latch not working Hard Drive Internal hard drive will not initialize: Keyboard No response from any key on keyboard No keyboard illumination Half keyboard is illuminated. Microphone The microphone is not working Modem No modem dial tone Modem does not respond (can hear dial tone) Optical Drive The optical drive does not accept CD or DVD disc (mechanical failure) Difculty writing to optical media PC Card PC Card will not insert into the PC Card slot PC Card does not mount to the desktop Ports A USB port is not recognizing devices A USB device not recognized by computer A FireWire port is not recognizing devices Sound No sound from speaker(s) Distorted sound from speakers Trackpad The cursor does not move when you are using trackpad The cursor intermittently does not move or moves erratically Video No display, or dim display, but computer appears to operate correctly No video on an external VGA device connected to the external monitor (DVI) port Misc. Symptoms The Date and Time settings reset all the time Feet came off the bottom case Sleep LED does not come on when lid is closed Page Page PowerBook G4 (17-inch) Exploded View - 1