|Mac Plus with vertical broken lines in display
|Mac SE/30 with alternating black and white horizontal lines
I have a couple of old Macs that I'm working on - a Mac Plus and a Mac SE/30.
The Mac Plus started with a bong, but had no display. The SE/30 displays alternating black and white horizontal lines.
I tore both down and did a basic cleaning, hit the jumpers / headers with contact cleaner and reseated socketed chips. There was no change in the SE/30, but the Mac Plus now has a display, albeit with multiple broken vertical lines.
I still have a lot to do. I plan on reflowing solder joints on the headers and recapping the analog and motherboards. Given that the SE/30 has those nasty little failure-prone surface-mount can capacitors, I suspect it's issue lies there (I see no evidence of leaking caps on it yet, though).
In any case, I just thought I'd post here to see if there's anyone who knows if these problems are attributable to something more specific, like a bad memory chip, rather than more general issues like solder joints and/or failed caps.