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I agree on that safety cap.. Replace first, and then if the set still kicks the circuit breaker out, you may have a bad HV tripler (the gray box with the anode lead from it, up to the top of the CRT). Those leaked a lot, and caused a heavy load on the power supply. Easy to verify; carefully unsolder and secure AWAY from any metal, the black wire from the tripler going to the flyback. Turn the set on, and see if it still shuts off. If not, the tripler is bad. But again, watch out for that black wire while you have it off the terminal. The RF can arc an inch or more, and will cause damage to other parts, or of course cauterize a hole in your finger ;-). Also, when you resolder that wire, use black silicone RTV sealant to cover it with a blob, so as to protect it from arcing later.
Charles
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Collecting & restoring TVs in Los Angeles since age 10
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