Originally Posted by spacediver
heh interestnig - if you're really interested, you can invest in a second hand sencore CR70, which can deal with these issues quite elegantly. Here's
the awesome Randy Fromm talking about the CR7000 (which is like the CR-70 but can do all three guns simultaneously).
Ah ha, I already found this PDF!
Indeed, it does seem to be an intermittent short in the tube. While I have not been able to tap away the H-K short, as a test, I was able to make it happen by rapping lightly on the exposed glass area of the neck just past the first ring of adjustment magnets. For each rap the screen would go full red -- it was 100% repeatable. I did flip the monitor on its screen, unplugged it, and did some more sustained rapping, but it did not clear the short. Perhaps, I was not hitting it hard enough, but not knowing how much of an impact I could get away with, I tried staying on the conservative side. So, I will probably have to try zapping it away, either with a tester like the Sencore, or if I really want to try it on the cheap, with a charged capacitor (I am really not too keen on this second option).
I guess knowing the source of a problem is the most important step in trying to resolve it, so I have that going for me, at least. This will be the second Trinitron monitor that failed like this on me, so maybe the cost of getting used tester is not unjustifiable. Looking on ebay, it is kind of funny how the price for these old CRT testers is all over the place -- go figure.