Question about Apple 15" PowerBook G4 Aluminum 1.67 GHz LCD Display (p/n 1002587) (661-3749 1002587) Mac Notebook

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15" Powerbook keeps turning off

I have difficulty turning it on initially. Sometimes removing the battery helps. Once on it often turns itself off instead of sleeping, even when the power cord is connected. Occasionally it gets very hot in the area of the on/off switch. Could this be a battery problem? I've never replaced it in 4 years.

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Check and see if its part of the powerbook battery recall
that way its a free new battery after ruling out the battery
the cpu fan would be my next choice.

Posted on Aug 10, 2008

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1. Let it spin for a while and see if it eventually gets to the desktop. Sometimes this will work.
2. Insert your Mac OS install disk, restart your computer (if you need to force it to quit first, push and hold the power button until it shuts off). Then when you restart, as soon as you hear the famous mac chime, press and hold the C key until the Mac OS disk starts to load the system on the disk. Once it reaches the install window, don't launch the install, but go to the top menu bar and locate the Disk Utilities App and launch it. Run a Verify, Repair and also a Repair Permissions. Once done, shut down and restart without holding the C key. You should be good to go.
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1 Answer

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The backup battery connects directly to the logic board. From the symptoms you are describing (rather clearly, thank you), it seems apparent that your logic board may be faulty.
There are two more things you can try.
1) Reset Open Firmware: Unplug-replug your backup battery, then boot the system holding down Control-Option-O-F. Your machine will boot into Open Firmware. Type the following commands, pressing the "return" key at the end of each one:
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Won't Charge


Common fix for this problem is a simple Power Management Unit (PMU) reset. This will basically re-sync the battery "brain" to the computer so they when when to charge and when to stop. To do this, simply turn your computer off, remove battery and power cord and hold the power button down for 7-15 seconds. Then you MUST wait 15 seconds after pressing the button before applying power or inserting battery. 75% chance this will fix your problem. If Not, Replace Adapter/Charger. They have a microchip in them that can go bad that senses when to send more current to charge battery. Apple motherboards are generally better built so I'm not suspecting that at this moment. Let me know what you find out.

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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

May 26, 2008 | Apple 15" PowerBook G4 Aluminum 1.67 GHz...

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