I was recently given a 512Ke, with an issue: On power-on, the machine repeatedly chimes, then resets, chimes, resets. The cathode tube never illuminates, nothing else occurs. the chime repeats about once/second.
I recall something with the power sweep boards on these. Other than that, before I crack her open, I figured it may be wise to ask if anyone else has encountered this issue.
Is this a known problem with a solution, or some random fault that I will need to inspect at all stages?
Update: I tested the mainboard on a known good power/sweep board. It has the same symptoms. What on the mainboard would cause this, but fail to reach the sad mac fault indicator?
typically power supply problem.
you might want to check for cracked solder joints or loose/bad connector between the analog board and the logic board first.
I reflowed it, with no change. I also saw no broken or cold joints when I examined it. I have never seen this specific condition in the past, so I may just rule it as dead until or unless someone has any idea what to check.