Computer won't start -- help:(

Hi, I was working on my ibook g4 and suddenly it quit/went blank without any notice. Battery is charged, it's plugged in, I've tried PRU and PRAM things from support e-mails and still nothing. It won't respond at all. Any other ideas? Can I try booting from another computer or disk? What could be the problem? Thanks!

I did think of the power button. It has been used alot though not really abused. I guess I can look and see if wires have unsoldered though I'm having trouble getting inside. I took off 3 allen screws from bottom but I think there's more, maybe under the rubber feet. Yes, the computer did charge so that may be good that it's not the logic board. However, the computer shutdown (crashed?) suddenly as I was using it and would that be due to the power button? Would humidity have something to do with it (no a/c!). I had a hard drive go in my g4 but it was a slow death, I tapped it with a screwdriver, etc to keep it going for a while. This was a sudden death. If not power button, what else? Thanks, Mark

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HELP PLEASE!!! Computer won't start up

Help Please!
My computer won't start up, when I click the start up button the light comes only once, sounds click (once) and that's it, no power up.
Because of the age, I knew that the battery could be the reason, so I ordered the exact same battery and replaced it today (following the instructions very carefully). Nothing changed. Then I read about the button for resetting the power management (the one below the ram memory), did that too...and nothing.
I read the manual, it talks about recently installed components (which I have not) and explains the meaning of the numbers of blinks the power light makes with this type of failure, 2 blinks=ram memory, 3 blinks...4 blinks..more than 5 blinks= take it to service.
If somebody could please help me, I would really appreciate
All the best,
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I had similar problems with my G5 2ghz dual PPC. Mine would turn on, sometimes the startup chime would sound, sometimes not. The fans would run and continue to run faster and faster until I shut it off.
The red light comes on by the way, when the internal plastic shield is not installed or seated correctly.
Anyway, I determined after fooling with the machine for several hours that the symptoms pointed to the video card so, on a hunch, I grabbed a hair drier, pulled the video card and warmed up the video card with the drier. Then reinstalled the video card, hooked up the monitor and hit the power button. Bingo, the machine booted normally. BUT, it would intermittently hang or act odd while running so, I ordered a replacement video card. Installed it and the problem never returned. Sadly someone stole the machine last month but it was in perfect working order at the time:(

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Try booting from your system CD, run Disk First Aid from your Disk Utility and repair your permissions.
-Bmer
Mac Owners Support Group
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{---------- Please click the "Thumbs Up" to say thanks for helping.
Please click "Accept As Solution" if my help has solved your problem. ----------}
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chiae:
am i looking for the Leopard installer or the disc that came with my Powerbook all those years ago?
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• Hold keys down until you hear the startup chime for the third time.
• Release the keys and immediately hold down Shift key to start up in Safe Mode.
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What does a file folder with a question mark in it mean when the computer won't start?

What does a file folder with a question mark in it mean when the computer won't start?

There are four general causes of this issue:
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2. The internal drive's directory structure has become damaged. This requires usage of an alternate bootable system to perform the repair.
3. Critical system files have been deleted. This requires usage of an alternate bootable system to reinstall them.
4. The internal drive has died or become unplugged. This is the most likely case if the computer took a sharp impact or there are unusual sounds coming from the hard drive's location.
(68976)

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You can, in addition to Barry's excellent suggestions, reset the SMU.

Computer won't start -- help:(

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