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Re: iBook G4 Fan keeps running
Next time you experience this, go to utilities.activity monitor..it will show you what program ir running the "hottest:, and the graph will display what is currently going on. you may have something running your not even aware of...
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If you external DVD drive connects via USB, try rebooting your iBook. (Sometimes a static shock will shut down your USB channel, and only a reboot will reset it.)
If this doesn't work, choose "About This Mac" under the Apple menu, then click on "More Info." Under Hardware, click on USB. See if the drive shows up as one of the attached USB devices. If it does not, the drive or cable may be bad.
If you have another computer available, connect your DVD drive to it. This will tell you whether the drive has failed.
My nephew's W350A had the same issue last year. It turned out that the CPU was loose in its socket and not allowing the POST cycle to run. You will need to remove the back cover and the bracket that goes across the CPU. Remove the CPU and clean the pins with a little rubbing alcohol, re-install and you should be fine. Remember to aply a little more heat-sink grease across the top of the cpu before putting the bracket back on. This will help keep it running cooler.
Sounds like you have a problem with the logic board. This appears to be a common problem with iBook G4 related to the fit of the logic board (ie motherboard) within the case.If you were to take it to apple store the likely fix would be to replace the entire logic board which is very expensive and probably not fiscally sound on a 5 year old machine. Another option would be to try to fix it yourself. If you are feeling brave you can dissemble the laptop and attempt to shimmy the logic board back into position.
Some computer react this way when the logic board goes bad or have a defect in it.
First, Try this:
Remove the battery. Plug back in the power cord, then press and hold down the power button til you hear a loud beep sound. then release it. If the computer starts back up... Then you should be okay.
If not, it may has something to do with the logic board.
Let me know if the above works...
We may can try some other things if not.
Probably the dvd drive is damaged (boot the computer with a bootable cd and see if it works, if not, change the drive), or it might have weak connection in it's slot, remove it and reinsert it in the laptop, see if it works.