We brought the set in the house and I tried turning it on...there is no power now. Tried a different cord but no luck...will need to check and see where the circuit breaker is in the circuit, or maybe the power switch is bad. It has a 21GUP22/21FBP22 Colorama crt installed in 1972. The damper tube has a wafer base...it appears the set was maintained for a fairly long time.

There is no circuit breaker on these sets. Look for the thermister near the top of the chassis (on the underside) and see if the trip broke the round therm. It's near the power transformer, and you might notice some heat marks above it on the chassis.