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There is another test you can do on the horizontal that doesn't use any typical test equipment.
It requires that you have a fluorescent bulb however and they might be on their way out. Replaced with LED bulbs. The bulb does not have to work in a socket.
Hold the bulb near the flyback or horizontal output tube and it should glow.
It doesn't tell you the frequency is right and it doesn't tell you that the DC HV for the CRT is there. It is just another test.
Are you sure about the voltages on the CRT base? They could momentarily change when you change that switch.
Last edited by Notimetolooz; 08-06-2022 at 09:05 AM.
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