PB 12" will not successfully boot / shuts off as soon as the dock loads.
I have a 12" PowerBook G4 1.33 with 256MB RAM, 60GB HD, OS 10.4.11. Just replaced the optical drive which was bad, and ever since doing that, the computer will do the following:
-I press the power button, I hear the Mac chime.
-The Apple logo appears and begins to load.
-The "Loading Mac OS X" dialog appears, loads...
-Desktop appears, then the top bar, then the dock...
-Then, the computer will do one of the following things:
1. Shut off immediately (yet I still hear things running like the optical drive and HD)
2. A dialog appears about the computer's clock being set to before March 31, 2001, then shuts off.
I have checked everything with this machine and all is plugged back in as I found it. I even took this to the Genius Bar and they ran tests and all, and even tried to boot from an external drive, but nothing. The only difference was they were able to get it to stay on for a minute or so, then it would freeze, then shut down after being frozen for several minutes.
I reapplied thermal compound generously, so I don't feel it's a heat issue. I'm just at my whit's end! Can anyone please help me? Apple can't even check this machine in for repairs due to its age. I even bought another HD to see if that was the problem, and here's what happens:
I try to boot from the disc, which it does and starts the installation process, but as soon as I make my language selection in the installation and click continue, the machine shuts off, like above. So, I don't think its the HD.
I would certainly appreciate any help anyone can give me. Thanks in advance!
Welcome to the Apple discussions.
First, assuming you get the machine running, you really should increase your memory. While 256MB is the minimum for OS X Tiger, you really should increase it to at least 512MB (add a 256MB card), or 768MBK (adding a 512MB card) or maxing the memory by adding a 1GB card, taking it to 1.25GB. OS X Tiger (10.4.11) is a good operating system, but it needs more than the minimum to run well.
That aside ... while you say Apple ran tests, have you run the Apple hardware test? Find your first original OS X gray-faced disk that came with the system (should say AHT Version x.x in small print on the label), insert, reboot while holding the alt key down, choose the Apple hardware test, and when prompted choose the extended test. Does that tell you anything?
The fact that you get a dialog about the computers clock being off suggests you have a problem in your power circuit. Are you trying to boot with both the power adapter plugged in and a working battery? The only reason you'd get that message is if all power ... both power adapter and battery ... are removed. The 12" PB doesn't have an internal battery to retain information like the date when all power sources are removed. Unfortunately, I'm not aware of any Apple tests that specifically check the power circuit. Usually, the fix is to replace parts from cheapest to most expensive. Assuming you have both the power adapter installed and the battery, and that they are both working, the first places I'd look at are the DC to DC card and/or the logic board.
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WyreNut
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