"Franc Zabkar" wrote in message
...
On Thu, 9 Oct 2008 05:12:04 -0700, "William Sommerwerck"
put finger to keyboard and composed:

As the
symptoms -- dead display, input locked to digital source, low-level buzz
at
all outputs -- are not likely to be caused by the failure of a single
chip,
the likelihood of something in the power supply -- in this case a bad cap
that "comes and goes" -- seems likely.

Why couldn't all those symptoms be the result of a brain-dead uP?

They could, but...?


Of course a brain-dead uP could itself be the result of a missing or
low supply rail, or a faulty crystal.

True. Guess I won't know until I tear into it over the weekend.