Hi folks,
I'm trying to restore an original Mac 128K and am having an issue. It started with sad mac telling me to replace a RAM chip. In the process of removing the old chip and putting in a socket, the video output went from normal sad mac screen to this:
Normally, that would look like an analog board problem, but I plugged in a Mac Plus board and the display worked perfectly, so I'm sure its not the analog board. I don't think it's my memory chip as I get this screen whether the new memory chip is in or not.
Anyone seen anything like this before or have any ideas?
Thanks!
Matt
For sure this looks like an analog issue... so that it seems logic board dependent is weird. Have you inspected the joints and pins on J7? Or there's possibly a short on the board now (probably around where the socket was installed, obviously)