MOTM

>It would be a good idea to open it up, John.  Leave the power off and
>look for something obvious.  It may be that some crawled in and died
>(you'd be amazed at how often that happens)or something was spilled
>into the unit.  Perhaps something has been jostled out of place and is
>now resting against the CRT or some other heat producer.  You'd want
>to catch that before it fails.

You definitely want to open it up and take a look. Arthropods are attracted
to the warmth of electronic devices so it could literally be a "bug".

One of my co-workers found a "roach" in a field-strength meter he was
repairing, only this was the hand-rolled kind...

-- 

Terry Bowman, KA4HJH
"The Mac Doctor"