Flakey Molex(?) connectors
If they're tin plated, they are not good for small signals. The
contact surfaces can usually be restored by simply pulling and
reinserting the connector a few times. Square pins can be brushed
clean. The problem will reoccur. It can be agravated by mixing tin
with gold flash (pins vs receptacles. Sometimes the gold flash in the
receplacles is local and hard to identify.
Depending on humidity and temperature levels, the tin/tin contacts are
good for between 6 and 10 years, between cleanings.
RL
google "fretting" corrosion.
can be insidious to troubleshoot
mark
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