LC III power outage woes

[sgraem]

Hello,

My LC has acted up over the years, and I've been able to get him back in line, but now I'm stumped. Today I had 2 power outages, both within an hour. The first one lasted about 5 seconds or so, and he booted back up once the power came on. After about 10 minutes of using him, the power went out again, this time for good. I gave up and flipped him off once the power was out. When the power came back on and I started him, it seems as though the clock battery died, even though replacing it did not help (no video, no chime, just fan and hard drive spin up). I distinctly recall a previous issue like this, but I can't remember what I did to fix it. I hate to ask, but is all lost? Without the chime, I can't zap the PRAM or do any other startup keyboard commands. Please help. Thanks.

Graem

EDIT: By the way, on my logic board, there are two solder pads that say RESET next to them. If I bridge them with some wire, would it work like a CUDA reset? Also, try as I might, the quick flip power trick does not seem to work on him, no matter what I do.

 

[Dennis Nedry]

If there is no startup chime, I suspect bad capacitors. I have one like this too, sometimes it will work if I fiddle with it enough. I've had some superstitious luck by removing the pram battery and shorting the terminals in the battery holder for a few seconds. (That probably doesn't make a difference, but why not try I guess.)

If it's capacitor-related, you could try washing your logic board, that could probably help. Search this forum for some good info and tips on washing your logic board.

 

[uniserver]

i would think you just need a power supply, if you ask in trading post i am sure someone has a psu.

 

[sgraem]

:O I don't know how, but through some voodoo ritual involving copious amounts of rubbing alcohol, HE'S ALIVE! The only issue now is that the "sound" of the computer dips slightly when powering on the monitor during a cold boot, but that can be fixed with a battery swap (I tried an older purchased one from my G4 MDD). Thanks a bunch! May my macintosh live its golden years peacefully.