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Do you have a way to validate if you have high voltage to the CRT anode? One quick way I used a long time back, (aside from listening for the high frequency whine) is to put your forearm perpendicular to the front of the CRT face about a 1/4" away. If you have HV, it will make your arm hair stand up. This may not work with CRT's with lower anode voltage, high humidity locations, (or if you have no arm hair), but may help otherwise in a pinch.
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