My ibook g4 won't start up after pushing the power button. No response at all

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My ibook g4 won't start up after pushing the power button. No response at all

When I press the power button nothing happens. I tried just holding it down for about a minute and nothing. I then tried pressing the shift key and power and that didn't do anything. Wondering if maybe there is something else to try. Battery shows fully charged

Tom

MacBook Pro, iOS 8.3

Posted on Aug 30, 2015 8:49 PM

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Answer 1

Tomnjo15 Author

Level 1

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Aug 30, 2015 8:51 PM in response to Tomnjo15

This is on a ibook g4 older machine not the MacBook pro. I don't know what OS it has on it

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Answer 2

Jan Hedlund

Level 7

22,219 points

Aug 31, 2015 2:58 AM in response to Tomnjo15

This is what an earlier (archived, last modified July 17, 2013, apparently no longer available) Apple support article had to say about resetting the Power Management Unit (PMU) for iBook G4 models:

If the computer is on, turn it off.
Reset the power manager by simultaneously pressing and then releasing Shift-Control-Option-Power on the keyboard. Do not press the fn (Function) key while using this combination of keystrokes.
Wait 5 seconds.
Press the Power button to restart the iBook computer.

If the above does not help, do you hear any sounds from the computer?

Any change if you carefully try to move the DC plug?

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