Apple iBook - Page 14

12 - iBook (14.1 LCD 16 VRAM) Troubleshooting
Symptom Charts
4. Check trackpad cable and connection to the logic board (see separate Top Case
replacement instructions for location under RAM shield).
5. Replace top case.
6. Replace logic board.
The cursor intermittently does not move or moves erratically
Note: User must touch with the surface of only one finger at a time and point directly down
on the trackpad surface.
1. Clean trackpad surface (with computer off, using a non-static-inducing material).
2. Completely shut down, then press the power button to start the computer.
3. Reset the power manager by pressing the key combination Control-Option-Shift-
power.
Warning: Make sure you do not hold down the "fn" key when resetting the
power manager.
Warning: Resetting the power manager will permanently remove a RAM disk, if
present, and all of its contents. You will also need to reset the date and time
(using the Date & Time control panel).
4. Try unit on battery power. If problem goes away, replace power adapter.
5. Place a Mac OS system CD in the optical disc drive, press the start button and hold
down the “C” key. Check the cursor movement, to see if the problem is software.
6. Check trackpad cable and connection to the logic board (see separate Top Case
replacement instructions for location under RAM shield).
7. Replace top case.
8. Replace logic board.
The microphone is not working
1. If in Mac OS 9, check the Sound control panel and verify that the selection for input is
the built-in microphone.
2. Check the signal level and level meter and adjust the gain.
3. If in Mac OS 9, remove Sound Preferences from the Preferences folder and restart.
4. Reset PRAM (Press the power button, then hold down the Option-Command-P-R
keys until you hear the startup chime at least one additional time after the initial
startup chime).
5. Verify microphone cable connection to logic board.
6. Replace display assembly (which includes the microphone).
7. Replace logic board.