WTB: 502 CPU board

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gekaufman
Posts: 13
Joined: Mon Nov 23, 2015 12:57 pm

WTB: 502 CPU board

Post by gekaufman » Tue Dec 29, 2015 2:33 pm

I have my C2-4P that I purchased back in around 1977 - unfortunately during a long period of storage it had significant mouse damage. I have the video board and power supply working but the damage to the CPU board was more significant.

I'd love to find a 502 or similar CPU board so I can get the system back to life.

Thanks!

- Gary

gekaufman
Posts: 13
Joined: Mon Nov 23, 2015 12:57 pm

Re: WTB: 502 CPU board

Post by gekaufman » Wed Dec 30, 2015 2:43 am

[ I've copied this topic to the Discussions/Projects subforum to continue discussion of the board and its repair there. -Dave ]


Here are some pictures,

The CPU board was originally coated in urine/feces/fur. I've scrubbed it extensively, so it looks a lot better now.

I suspect some of the sockets are making poor contact, and some of the jumpers from the 1970's will need replacing.

It's probably fixable, but if I could find a better CPU board to work with I'd like to start there and get the system up first.

Almost all of the ribbon cables were chewed up, as were much of the other wiring. I've rebuilt the power supply, resprayed the case and replaced the ribbon cable from the keyboard.

I think the video board is ok (It displays random junque).

Image

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Image

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