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PowerBook 190 strange behavior

PowerBook 190 strange behavior Hardware 37 posts Apr 26, 2015 — Jan 21, 2023
Here's an update: I've actually found the culprit! (I think)

There was a chip in the battery area named T548 whose function I don't know. This chip had developed a short, probably because of the leaking acid that corroded the protective layer of the case and exposed the copper underneath. 

I tried to remove it and hope for the best - now the system occasionally chimes, but it seems to continuously power cycle, it keeps on chiming all over again. I'm not even sure it's fixable at this point, but I'd like to understand what that chip does, if anyone knows, and if it can be "bypassed" so to say. I feel it's got something to do with battery management, but I'm not quite sure.

mp.ls