[Coco] Coco1 repair parts ?? & Results of Repair!!

[John M. Eicher]

The RAM chip situation could have been chip creep. From heating/cooling
and different rates of expansion/contraction of the parts... Plastic,
tin, ceramic, etc, can cause socketed chips to creep out of the socket
over time. I had to reseat socketed DIP chips many times both back in
the day and more recently on 80486 boards.

John

-----Original Message-----
Sent: Tuesday, July 06, 2004 10:12 PM

Inspired by your success, Robert, I kept plugging away at my CoCo1
troubleshooting... very lucky I had two identical F board CoCo's handy
and one of them worked.

The first thing I found when I removed the tin shield over the RAM chips
was that all eight chips were barely pressed into their sockets. Whoever
built the thing must have been worried about pressing down too hard. I
can't believe it worked for me for so long... at least six years and
much of that in all-ram mode.

Bob