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use a HV probe to monitor the CRT anode voltage
is the HOT red plating? wiggle the HOT and the horz osc tubes. hold a neon bulb near the plate cap of the HOT (I have one mounted to a small plastic stick).
I would pull the HOT plate cap off, check for B+, if that checks then I would put it back on and check the HOT grid for about -50v, screen voltage of around 150v. Also check the cathode current of the HOT.
This is where a tv analyst like a B&K 1076 comes in real handy.
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