Chosen Solution
I’m trying to get my old 128K Mac up and running. All the boards/caps look good. I do not have the backup battery installed but it is on order. However, when I power it up, the speaker makes a noise like tic, tic, tic over and over and there is no chime or video. Any ideas? Update (12/16/2021)
@kozchris there is no real pinpoint answer for this. This could be anything just based on the age of it. It all will depend on how many miles it has on it and how degraded some of the components are. Capacitors for example may look fine but are so degraded that they will have to be replaced. Use a good capacitance/ESR meter to see what is going on with them. I would recap the board just to make sure. also a gentle re soldering of other connections might prove beneficial. This is a great project and here are some schematics and documents that might be useful to your task. The goop around the caps and other component is a PITA and requires a couple of dental picks and a bit of heat. Let us know from time to time how the projects is coming along. Macintosh 128k.512k
SafetyClassic Mac Tech Info
