Recently I was able to acquire a 512K compact mac. When initially powered on the system bongs and boots from the floppy, but the crt remains blank. If you wait long enough to allow the analog board to get sufficiently warm, the crt will begin working. As the temperature rises the crt will blink until it achieves a steady state. From a cold start, this process could take up to 10 minutes. Any suggestion on what to troubleshoot first?
512K CRT not working until the analog board warms up
- Thread starter Breezy
- Start date
Sounds like cracked solder joints on the analog board -- a common problem with that model. As the machine heats up, the components expand slightly and eventually make connection.
Yep... that could be indeed the cause too... a way to confirm is tapping the left side of the Mac, and see if that makes it work.
Colin,
You were correct. I reflowed all the connectors and the fly back and my problem was solved. See the attached picture. Thanks for pointing me in the right direction.
Nice pic showing this very common problem! Glad you got the old girl going! But probably time for a recap if not already done to ensure she keeps working.