On 06/02/11 04:59, John Robertson wrote:
When you removed the old socket did you carefully
examine the legs of
the pins to see if you accidentally pulled out any feed through tubes?
I didn't see any.. although from experience they can be quite small.
I'll see about pulling the socket and continuity-checking between the
top and bottom sides.
Interestingly there are a few areas of the board which aren't the same
brown colour -- there are bits of black around the pins, which look like
they're inside the PCB.
What did you do to clean off the corrosion? I hope you
used a mild acid
such as white vinegar to neutralize the alkaline (base) leakage then
rinse off with water...
Yup. White vinegar brushed onto all the corroded parts, left for a
minute or two, rinsed with water, then a final clean with Chemtronics
Flux-off to drive off any remaining water or grime.
After I soldered the new socket in place, the whole board got a dunk in
isopropyl, including scrubbing all the dirt out from inside and between
the ISA slots, chips, etc. That thing had more dust bunnies than the
Playboy mansion...
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/