I've found instances of regulation failures caused
by loose hardware.  In particular the nuts atop the
filter caps that hold the regulator PC board loosen
and simply tightening then will cure the issue.  This
appears to be caused by compression of the PC board
material …"cold flow" to some readers.

There are several other common failures of this series
of PS's, but this one is perhaps the most prevalent.

While you have the cover off, check for paint under the
lug on the green power cord wire …

73!

Len Kopp- K0PP
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