Ok, I'll try my best to summarize:
Rev 4 2000 that had a bit of battery damage. However, I couldn't find any bad traces.
I replaced the cpu socket since it had a lot of green on it, but again, none of the traces or pads underneath it were destroyed, that I could find.
Initially, diagrom wouldn't show video, but worked over serial. And it showed that all chipram was bad. I built a 2mb chip ram upgrade (
https://github.com/LIV2/A500-2Meg-Chip-ram) and decided to install that instead of trying to replace the 32 individual memory chips.
Once installed, I was then able to get video with diagrom, and it's able to see the 2mb chip memory and all tests for the chipmem pass. I also used diagrom to test cia, audio, joystick ports and floppy ports.
I used a meter to test points between the rom, cpu and u540/u541 and agnus. I don't see any bad connections.
The moment I put a kickstart (3.1.4) in, I just get a dark green screen.
Any ideas here? I'm at a loss.