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Thanks for all the responses!
I'm not going to be able to tear into this one for a week or so, what with all kinds of other stuff going on. But in the interim, I've been kicking it around in the back of my head now and then. Got a few more questions from a purely academic point of view, if you guys will indulge me..
Capacitor failure was mentioned; how would a capacitor fail to produce these symptoms? I don't have a defined raster pattern, it's more of a blur covering part of the screen. Do they fail 'partially shorted' and could this either drag down the B+ or draw enough current to pop a diode? I would think if any of the power supply caps were only open I'd just have a lot more hum in the audio and some bars in the picture.
Don't have a capacitor tester - is there any other way to see if the caps are OK? I've heard of testing ESR - is this a valid test for caps of this vintage?
Thanks again for the help - just trying to understand the beast a little better..
-Jim
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