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I’ve replaced the supercapacitor and sometimes, when it properly turns on, the head moves for a long time, which is a great sign I guess :) but still no chime and nothing

I cleaned it up as recommended and checked the D1 diode. It looks okay, no shorts. Just in case I put it back on the shield, after a few boot attempts the HDD spins. It’s interesting that the HDD not just spins, but the head moves as well, as if it’s reading something from disk.

Interesting, now it's spinning the HDD consistently on every startup attempt. I've also added an USB FTDI which should tell me whether there's 5V power on the USB. I don't see it lighting up. I wonder if the logic board is not delivering power to the display and USB.

I removed the metal bottom of the keyboard, so I'm not causing any shorts, but that still doesn't let the board boot. Regarding AV, I decided to test it only with headphones so I can try to hear the boot chime. I tested on the iBook G4 I have and I believe it should route to the headphones...

I don’t have any of those :( Brushing with isopropyl alcohol would work?

I took it apart and this is the logic board. The logic board has no apparent leakage. I plugged it to the TV using composite and I see some glitches when it turns on, but overall there’s no video signal.

I forgot to mention, I also removed the external RAM. I did try that, but it didn’t work

Hello! I got an iBook Clamshell from my local hackerspace and was trying to fix it. The display had the vinegar syndrome, so at first I thought it just had a bad display, but after some time I realized that it wasn’t giving the startup chime at all. The HDD spins (I swapped it to an IDE to SD...