Hello everyone I have an SE/30 that has had some work done, it appears previously recapped and looks to have trace repair done as well. Well at first everything went well until about 20 minutes after each use give or take, the computer would go black on the screen and then when you go to power it back on there's a flash of what was previously on the screen followed by a normal boot and then the picture collapses and goes black. I have tried to diagnose the issue and realized both the analog board and power supply had not been recapped so I swapped in known good ones from my other SE and same issues and yes voltages on each power supply and analog board were the same. The 12v and 5V rails are perfect. I can hear a sort of squeal at time but that's about it. Other than that it works just fine. I have also tested with a known good ROM and cleaned the ROM Simm and all RAM Simms and verified each works fine. As a last ditch effort I waited until it crashed and went to test with my TechStep and it lost SCSI/Serial Communication, basically it was unable to talk to the computer. However if I unplug it or leave it plugged in and let it sit it boots and works just fine for say another 20 minutes give or take. I've included photos and a video as well after it blacked out and I tried to reboot. There's also no chime after each black out/crash.
