I picked up a sick 512Ke to rehabilitate and am stumped at what the problem is.
There is no startup `bong` and there are thin horizontal lines over the entire screen.
According to my handy copy of the Dead Mac Scrolls, that is a chip on the analog board gone bad or a programmers switch that is touching the board accidentally.
Well, I don't have a programmers switch and when I swap out the analog board, I get the same symptoms, and the machine works just fine with a different (Mac Plus) logic board.
So, the problem has to be the logic board, I think.... but beyond that, I'm not sure how to proceed from here.
Here's a picture, BTW:
There is no startup `bong` and there are thin horizontal lines over the entire screen.
According to my handy copy of the Dead Mac Scrolls, that is a chip on the analog board gone bad or a programmers switch that is touching the board accidentally.
Well, I don't have a programmers switch and when I swap out the analog board, I get the same symptoms, and the machine works just fine with a different (Mac Plus) logic board.
So, the problem has to be the logic board, I think.... but beyond that, I'm not sure how to proceed from here.
Here's a picture, BTW: