Just popping in
Joined: 2006/12/1 5:39 Last Login
: 2018/12/13 3:26
From Atlanta
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@powerball
My card also was "unrepairable". I had been a repair tech for about 22 years, so when my card died, I went to work. I tracked the problem to a bad connection within the multi-layer board.
I've seen this type of failure before in all kinds of equipment. I've even repaired a couple of A3000's with this problem in the past. Sadly, in complicated equipment, the only guide for repairing this type of issue is the original circuit diagrams. I had no docs and could find none. Perhaps chasing signals with an occilloscope might reveal the bad connection, but that's a lot of time/work for a looooog shot chance.
Hoping that I might be wrong about my findings, hoping that JJB's more extensive Amiga experience might payoff, hoping that he might have more documentation to guide him, I sent my card to france.
Unfortunaltely, after swapping serveral chips, he agreed with my diagnosis that some where in the multilayer board a connection (or connections) was bad.
We both admitted defeat (painfully) and moved on. That was 4 years ago. Since then two more of my 3640 cards have died. Now my occilliscope is out of retirement. I'm not letting these go so easily.
Plaz
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