On Fri, 8 Jun 2012 18:23:31 -0700 (PDT), Peter Easthope
wrote:

I've never tackled anything this badly damaged. Cleaning
exposed surfaces with swabs and alcohol won't help the corrosion
in the holes and under the green polymer coating. What are the
recommendations? Is repair a realistic possibility? If so,
pointers about technique will help.

As others have mentioned, just clean up the mess with your favored
cleaner. Then tin what's left of the traces with plenty of solder. If
there's little copper left, run a bare wire over the traces, and
solder the bare wire to the traces. The bare wire should be about #20
AWG to avoid turning it into a fuse. Bigger wire is fine. If the
copper tries to detach from the PCB, do the bare wire trick, and then
bury it under some acrylic or urethane conformal coating to stick it
to the board. Don't worry about what it looks like as you're the only
person that will ever see the work.

You might also check the remaining capacitors with an ESR tester. Just
because the look good, doesn't mean they are good.

--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
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