@userc2 start of by following the Apple flowsheet which goes like this:
Symptoms
Screen is blank; backlight isn’t on; computer doesn’t respond
Check:
1 Reset the computer by holding the Command-Control-power button simultaneously.
2 Reset the power manager by pressing the reset button above the power button. Wait five seconds and press the power button. Note: Before continuing, make sure the reset button is not caught under the plastic of the top case.
3 Check power adapter cable.
4 Try known–good, charged battery.
5 Try known-good power adapter.
6 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.
7 Check inverter and display cable connections to the logic board.
8 Remove keyboard and additional memory (if installed) and restart computer.
9 Replace logic board.
Now, don’t replace the board yet ;-)
This “because it has been dead for a very long time, and the computer won’t charge it “ could just be one of your bigger issues. Remove the battery and check the contacts etc. After that you want to do a deep dive and take a look at the charging board as well as the DC-in board. Use these guides to work on it [[Topic:iBook G3 Clamshell]] and remember to always post good clear pictures with your QUESTION as you take things apart and have further questions or problems.
[guide|21499]
The part you definitely want to have a real good look at is the charger board. It should contain the PMU99 which is actually a Mitsubishi IC and its function includes : [br]
-
[br]
controlling the sleep and power on and off sequences [br]
@userc2 start of by following the Apple flowsheet which goes like this:
Symptoms
Screen is blank; backlight isn’t on; computer doesn’t respond
Check:
1 Reset the computer by holding the Command-Control-power button simultaneously.
2 Reset the power manager by pressing the reset button above the power button. Wait five seconds and press the power button. Note: Before continuing, make sure the reset button is not caught under the plastic of the top case.
3 Check power adapter cable.
4 Try known–good, charged battery.
5 Try known-good power adapter.
6 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.
7 Check inverter and display cable connections to the logic board.
8 Remove keyboard and additional memory (if installed) and restart computer.
9 Replace logic board.
Now, don’t replace the board yet ;-)
This “because it has been dead for a very long time, and the computer won’t charge it “ could just be one of your bigger issues. Remove the battery and check the contacts etc. After that you want to do a deep dive and take a look at the charging board as well as the DC-in board. Use these guides to work on it [[Topic:iBook G3 Clamshell]] and remember to always post good clear pictures with your QUESTION as you take things apart and have further questions or problems.
[guide|21499]
+
+
The part you definitely want to have a real good look at is the charger board. It should contain the PMU99 which is actually a Mitsubishi IC and its function includes : [br]
+
[br]
+
controlling the sleep and power on and off sequences [br]
@userc2 start of by following the Apple flowsheet which goes like this:
Symptoms
Screen is blank; backlight isn’t on; computer doesn’t respond
Check:
1 Reset the computer by holding the Command-Control-power button simultaneously.
2 Reset the power manager by pressing the reset button above the power button. Wait five seconds and press the power button. Note: Before continuing, make sure the reset button is not caught under the plastic of the top case.
3 Check power adapter cable.
4 Try known–good, charged battery.
5 Try known-good power adapter.
6 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.
7 Check inverter and display cable connections to the logic board.
8 Remove keyboard and additional memory (if installed) and restart computer.
9 Replace logic board.
Now, don’t replace the board yet ;-)
This “because it has been dead for a very long time, and the computer won’t charge it “ could just be one of your bigger issues. Remove the battery and check the contacts etc. After that you want to do a deep dive and take a look at the charging board as well as the DC-in board. Use these guides to work on it [[Topic:iBook G3 Clamshell]] and remember to always post good clear pictures with your QUESTION as you take things apart and have further questions or problems.
[guide|21499]