So I am repairing my first compact Mac, an SE/30 I bought off eBay a few years ago. When I first restored it, I took the motherboard out, recapped the board, and gave it a bath. At the time, that fixed the issues it was having, except for the sound was a little quiet.
A few years have passed since then, with some light use. Now, the machine still boots but I am facing two issues: (1) the video has wide bars of corrupted display, and (2) there is no sound at all (although I can hear the boot chime if I plug in headphones). The video issue was intermittent at first, but now it is con