On Thursday 24 May 2007 23:09, Cameron Kaiser wrote:
  Try swapping this chip between the two units and see
if it changes things,
 assuming the power supply is known to be good. 
Not necessarily a good assumption,  and I'd check the PS _first_ as that's
often the cause of a lot of problems,  particularly RAM failure.
I even went so far as to build myself a little load box,  with meter test
points and a couple of switches to select load on-off and which (ac or dc)
the meter was reading,  and still have it around here someplace.  That thing
would get downright toasty after the load was on for a bit,  and would show
up supplies that would only fail after they warmed up.
I'll add too that the supplies with vents in them were repairable,  and I
ended up replacing the regulator in a few of them.  The other kind were
epoxy-potted,  and otherwise useless though I did consider the idea of a
modern art sculpture on their lawn in West Chester at one point.  :-)
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin