I bought an LC 475 for parts and repair on ebay. When it arrived it seemed to work okay but the video was all stripey. After some diagnosing I spotted a rotten trace near the the VRAM simms. I repaired the rotten trace with a jumper and I got my video working. But now I've got chimes of death.
Removing the the ram upgrade fixes the chimes of death and allows the machine to boot. However when I reinstall the ram (or known working ram from other machines) I'm back to death chimes and no video (I don't even get a sad mac with a hex code)
I've hunted for other rotten traces on the board, but I'm not having any luck. What should I try next? (It's so frustrating that this was working. I've traded one problem for another.)