NotTaR of Television Sets : Brief comments on testing the HOT       
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Brief comments on testing the HOT

For a TV with no blown fuses that will not start, here are two quicky checks to see if the HOT is good and has power and drive:

WARNING: use an isolation transformer for the oscilloscope tests (and whenever you are probing a TV in general)!!! This part of the circuit, in particular, is usually line connected. See the sections on safety.