I got this very clean Libretto a while back. Unfortunately, it would not power up at all.
When opening her up I found a lot of acid damage from the CMOS battery (d*mnit, what a waste). I also snapped of the flimsy plastic screen connector retainer during disassembly, even though I was really careful. Sucks!
I bridged some damaged traces but still no life.
After measuring some of the fuses I found one with no continuity. Since I was in a 'screw it' mood by then I bridged it with a wire and tried it.
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Seems to work just fine now. I should replace the fuse though, and the harddisk sounds like it's dying, itshould be easy to replace with a CompactFlash.
Now to find a way to fixate the screen connector...