on 5/5/04 10:48 AM, Bryan Walter at [EMAIL PROTECTED] wrote: > 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.
I had this same problem. Exact. Many people will tell you to replace the PMU board. I did this. It did nothing. I eventually solved (sortof) the problem by jamming four quarters between the motherboard shield and the bottom case plastics, right under the hard drive. For some rason, this seemed to make the problem go away, unless I gave the 3400c a good jolt. > > 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. Thats strange. I have the opposite. My ethernet works, but the modem doesnt. My 3400c is riddled with problems, although it has yet to actually "die" as many PC laptops I had have. So I replaced it with a Wallstreet, upon which I type to you now. The 3400c is an airport software base station now YAY! > > 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 -- PowerBooks is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> PowerBooks list info: <http://lowendmac.com/lists/powerbooks.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/powerbooks%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
