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The first thing you need to determine is do you have high voltage to the CRT. When you turn it on, do you feel static on the face of the CRT?
To determine if the CRT filament is lit, look at the neck of the CRT, just past where the socket plugs in. You should see an orange glow in the neck if the filament is lit. If necessary, turn off the lights to make it easier to see.
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