Thanks for the response Jerry,
I've had the monitor longer than three years. I'm past the stage of
knowing enough to be dangerous far enough to make the repair. I was just
hoping someone here had fixed a similar problem with this monitor.
There is a slight snap sound, I can't pinpoint it but, I believe it
to be, or close to, the tripler. No visible arcing that I can see. There
are two components (s371+s671) that emit a blue spark close to each other
and the tripler (I thought all manufacturers kept the # designations the
same for each circuit, ie., 301, 302, 303, horizontal circuit ) . They are
glass cased and very well could be doing this from a loss of power as
apposed to going bad. I will keep observing and reading for now. Still
looking for answers.