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38 - PowerBook G4 (15-inch FW 800_1.5/1.33GHz) Troubleshooting
Hardware Symptom Charts
Misc. Symptoms
The Date and Time settings reset all the time
Note: Resetting the power manager or PRAM resets the date and time.
1. Do a backup battery test:
• Set the date and time.
• Perform a Shut Down from the Apple menu.
• Remove the main battery and disconnect the power adapter for 10 minutes.
• Connect the power adapter, insert the battery, and power on the computer.
• If the date and time were lost the backup battery may be dead or discharged.
• 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.
• If the date and time still reset, replace the backup battery cable.
2. Replace backup battery board.
3. Replace the logic board.
Feet came off the bottom case
Replace the missing foot.
Sleep LED does not come on when lid is closed
1. Put the computer to sleep using the menu option. If the sleep LED goes on, there is a
problem with sensing the closed display. If the LED does not go on, skip to step 3.
2. With the display housing removed, check the sleep magnet location on the LCD panel:
(See the LCD Panel chapter in the Take Apart section of this manual.)
• If it is not positioned correctly, reposition it.
• If the magnet is missing, replace it with a new magnet.
3. Check that the sleep LED is plugged into the logic board.
4. Connect a USB mouse. Short the power on pads on the logic board to boot the
system and use the mouse to sleep from the menu. Measure the voltage at the LED
connector. If power is present, replace bottom case.
5. Replace logic board.