I bought an ibook G4 back in December 2003 and it has worked perfectly for me up until a week ago. After a plane trip in my backpack it started refusing to come out of sleep (a problem I had seen before) forcing me to reboot it. On one of these occurrences it stopped booting altogether.
Instead of booting I hear the computer begin to start up and the fan come on - but it never goes any farther and the fan continues on full speed. This laptop is *not* included in the logic board replacement program and is no longer under warranty (It is an A348).
I have tried a number of things and have managed to get it to boot a couple of times. Firstly I reset the PMU off battery power and the computer successfully rebooted, quite a glorious moment in fact as I assumed I had solved the problem. However a few hours later it had stopped booting even after continual PMU resets. I tried it with the battery out, I removed my airport and extra ram and also tried that. I couldn't get it working for a few days. Finally a read a post suggesting I remove all power sources a few hours. I did that for about 24 hours and booted on the battery. Success! I rebooted a few times and still had success. I then ran the hardware diagnostics (off battery) and in the middle of the memory test my screen turned off and the computer stopped responding. After giving it a reasonable amount of time (15mins) to finish the tests and come back I forcibly rebooted it, this time with the power plugged in. It is now dead again and will not boot under any configuration. I have also tried booting with no battery off more then one power cord so that does not seem to be the problem.
Has anyone seen this before or have any suggestions? With a bunch of googling I was able to find a few postings from people with similar problems but no solutions, and no one posting back to say what their end result was.
Thanks ahead of time for any help, I have been reading this forum for a while but this is my first post!
buttercup
Instead of booting I hear the computer begin to start up and the fan come on - but it never goes any farther and the fan continues on full speed. This laptop is *not* included in the logic board replacement program and is no longer under warranty (It is an A348).
I have tried a number of things and have managed to get it to boot a couple of times. Firstly I reset the PMU off battery power and the computer successfully rebooted, quite a glorious moment in fact as I assumed I had solved the problem. However a few hours later it had stopped booting even after continual PMU resets. I tried it with the battery out, I removed my airport and extra ram and also tried that. I couldn't get it working for a few days. Finally a read a post suggesting I remove all power sources a few hours. I did that for about 24 hours and booted on the battery. Success! I rebooted a few times and still had success. I then ran the hardware diagnostics (off battery) and in the middle of the memory test my screen turned off and the computer stopped responding. After giving it a reasonable amount of time (15mins) to finish the tests and come back I forcibly rebooted it, this time with the power plugged in. It is now dead again and will not boot under any configuration. I have also tried booting with no battery off more then one power cord so that does not seem to be the problem.
Has anyone seen this before or have any suggestions? With a bunch of googling I was able to find a few postings from people with similar problems but no solutions, and no one posting back to say what their end result was.
Thanks ahead of time for any help, I have been reading this forum for a while but this is my first post!
buttercup