My mac powerbook g4 will not turn on, no sound comes from the computer (fans and what not) when I press the power button, when its plugged in there is a green light around the power adapter port, and when I press the little button on the battery no little lights light up on the battery. I was thinking that my battery is old and wont hold a charge anymore, but the computer will not even turn on even when plugged in.
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The Powerbook G4 power button functions like a reset button if you hold the power button in for a few seconds until the computer powers down.
Hold the power button in for a few seconds (until you see the screen turn off/go black and hear the fans & hard drive stop spinning).
Press the power button again to turn your computer on.
If you have more trouble, you may need to boot in Safe Mode or "perform a Safe Boot": Press and hold down the "Shift" key immediately after you hear the start-up tone. Release the "Shift" key when the gray Apple icon appears on the screen.
The PowerBook G4 line was the last generation of the PowerBook series, and was succeeded by the Intel-powered MacBook Pro line in the first half of 2006. The latest version of OS X any PowerBook G4 can run is Mac OS X Leopard, released in 2007.[ Your computer is too old.
The PowerBook G4 line was the last generation of the PowerBook series, and was succeeded by the Intel-powered MacBook Pro line in the first half of 2006. The latest version of OS X any PowerBook G4 can run is Mac OS X Leopard, released in 2007.[
If there's no chime, your problem could be anything from a dead battery or bad AC adapter to a dead logic board.
Does the tip of the adapter on your AC connector light up? If not, that's a problem.
When you push the button on the battery, do you get at least two glowing LCDs? If not, that's a problem.
Otherwise, try the following: remove the battery and the AC jack to make sure the machine is off. Now insert the AC jack, and reset the power management unit by pressing the following multi-key combination:
Shift Control Option Power-button
Wait five seconds, then press the power button to attempt to start the computer normally.
The instructions above are for the 1.5GHz PowerBook G4; the instructions MAY be different if that is not your model.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
Your computer's PRAM and the NVRAM are reset to the default values. The clock settings may be reset to a default date on some models. If I could be of further assistance, let me know. If this helps or solves the issue, please rate it. Thanks, Joe
your lcd probably just went out or the connecting cable just came loose(its in behind the lcd under the apple logo that lights up when you turn it on) if you open and close it frequently it will cause this