Apple pbg4 ge Servicehandbuch
Troubleshooting
Symptom Charts/Misc. Symptoms - 7
• Remove the main battery from the unit and leave the
PowerBook plugged in for at least 5 hours.
Note:
If a discharged main battery is installed in the
computer, recharging the backup battery may take up to 48
hours to completely charge. It is okay to use it while it is
charging.
hours to completely charge. It is okay to use it while it is
charging.
• If the date and time still reset, replace the backup battery.
3
If not the backup battery, replace PMU Card.
Note:
For main and backup battery part numbers, refer to article
11751: Macintosh Family: Batteries and Part Numbers.
AirPort Card installed
and received a -3278
error
and received a -3278
error
1
Use Software Update control panel or see the Apple Software
Updates web page to make sure the latest version of AirPort
software is installed.
Updates web page to make sure the latest version of AirPort
software is installed.
2
Boot using Mac OS All extensions setting.
3
Reseat AirPort Card.
4
Remove and reinstall the AirPort software.
5
Replace with known-good AirPort Card.
6
Replace logic board.
The microphone is not
working
working
1
Check the Sound control panel and verify that the selection
for input is the built-in microphone.
for input is the built-in microphone.
2
Check the signal level and level meter and adjust the gain.
3
Remove Sound Preferences from the Preferences folder and
restart.
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).
Option-Command-P-R keys until you hear the startup chime
at least one additional time after the initial startup chime).
5
If no sound as well as microphone is not working, verify
cable connections.
cable connections.
6
Replace top case.
During startup boot
sequence and before
reaching Finder, the
following dialog box
appears: “The built-
in memory test has
detected an error”
sequence and before
reaching Finder, the
following dialog box
appears: “The built-
in memory test has
detected an error”
1
If a RAM card is installed in the upper expansion slot (if not,
skip to next step), remove it and restart. Refer to Customer-
Installable-Parts Memory Replacement instructions.
• If symptom does NOT repeat, replace RAM card.
• If symptom repeats, replace RAM in lower RAM slot with
skip to next step), remove it and restart. Refer to Customer-
Installable-Parts Memory Replacement instructions.
• If symptom does NOT repeat, replace RAM card.
• If symptom repeats, replace RAM in lower RAM slot with
known-good SDRAM SO-DIMM RAM card and restart.
- If symptom repeats, replace logic board.
- If symptom repeats, replace logic board.
2
If a RAM card is NOT installed in the upper expansion slot,
replace RAM in lower RAM slot with known-good SDRAM SO-
DIMM RAM card and restart. Refer to Customer-Installable-
Parts Memory Replacement instructions.
• If symptom repeats, replace logic board.
replace RAM in lower RAM slot with known-good SDRAM SO-
DIMM RAM card and restart. Refer to Customer-Installable-
Parts Memory Replacement instructions.
• If symptom repeats, replace logic board.