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Thanks. Messing with the tuner does nothing, no static out of the speaker, or on the screen when I change the channels. Turning the volume control does produce some static. With both no picture or sound and the tuner doing nothing, I'm thinking the problem has to lie in the IF sections common to both. In this set the sound comes off after the 2nd IF tube, so that narrows it down a bit. It could be the local oscillator coils in the tuner need adjustment like they did on my 721ts, but with the tuner having no effect at all on the picture, I'm thinking there's something else wrong here. I'll pull the chassis later and check it out after I see if I can get ahold of a new power transformer. With 4 video IF sections this set must have been quite a performer in it's day.
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