Hi everyone,

Long time lurker but very short time poster!

I have looked through the forums but haven't seen a question same as mine yet (if there is I am sorry and I will delete this post).

There are 7 Mac Plus's at home I have been hoarding away (hate that word). The other day I got motivated to pull them out and have a play.

First one tripped the house circuit safety switch after about 3 minutes.

Turning the next 6 on achieved the same result, some after 30 sec and others after 2 or 3 minutes. Grr

Pulling these guys apart revealed no apparent capacitor problems wrt bulging or leaking caps on the logic or analog boards.

Where do I start?

I see C1 mentioned but seeing as all 7 have the same problem (all previously working a couple years ago) there must be a known cause?

The screens were bright and clear when they were running.

Any suggestions would be appreciated.

Thanks