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Yeah I figured the power on circuit is shot, hence why I was powering it on by attaching a battery to pin15. I'm more curious as to why I'm not getting anything past PSU powering on though. I was thinking it could be the traces that look damaged in the photos but I'm unsure, I'd hope there'd at...

Also I know I am missing the 3.6v battery for the power on circuit, I moved the PRAM battery which is still good there and connected the coin battery via terminals to the pram slot but still didn't power on with the power button. I am receiving new 3.6v 1/2 AA's sometime today to see if that...

There is a power switch in the back of the unit, but it seems to do nothing. It is sadly covered by the metal box with the power connectors in the top right of the first image. I am unfamiliar with Mac II's so I'm unsure if this is original.

I have this Greenspring RM1200 Macintosh II that I am having trouble with finding any info about. I am able to jump start it using a coin battery but it powers on with no chime and no power to hard drive. It most likely needs a recapping, but what confuses me is the key mechanism that is...