Hi List,
I've recently acquired a PowerBook 3400c (200MHz model) which has quite a number of interesting problems. I'm anxious to get new parts in it and restore its health, but I'm not quite sure what's wrong.
First, the booting is sporadic. Sometimes it doesn't want to boot at all, other times it will boot spontaneously when the AC adapter is plugged in. Seems to me that it is some type of power problem, as the OS can't get any solid reading on the battery or the battery time remaining although the battery does work. While it is plugged in to the AC power, there is also a high-pitched whining buzz that comes from the PowerBook. It sounds like it is coming from right below the trackpad, where the PMU board is located.
Also, there seem to be issues with the motherboard. It started out that the PowerBook just won't make any sound whatsoever. No boot chime, nothing. It doesn't make sound through external speakers either or take a signal from a microphone that is plugged in (although the internal mic seems to pick up sound fine). I started testing it one day, and I discovered that the ADB, VGA, and serial also don't work, and I presume the SCSI probably doesn't either although I don't have an adapter to test it. Another interesting thing is that the modem most definitely dials out and works, but the ethernet on the same card doesn't work at all.
All this has led me to believe that there is a problem with the PMU board, and possibly with the motherboard as well. Trouble is, I don't know where to find either part without paying through the nose so I want to be sure what the problem is so I don't buy parts I don't need. Anyone have any ideas or seen anything similar with another 'Book?
Thanks,
Bryan
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