Sometime either today or in the next day or so I am going to clear my bench and take the chassis into my shop and try all that you all mentioned. I really do appreciate the help with this. Tv repair is a big jump from vintage hifi restoration like I used to do.
As for oscilloscopes I have a Kenwood CS-4025 which is no good for this set since it only goes to 250v. The Tenima 72-720 goes to 600v so it should be best. Both are calibrated and tested.
I did not know about using an isolation transformer. Very good advice. I just got one out of a tv repair shop that needs testing (condition is poor).
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