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these sets can be kinda odd, check to make sure you have both the contrast and the brightness adjusted (you may have to fiddle with them a bit), IIRC the contrast is really a gain control and you can cut off the CRT if not adj properly, it does not have the AGC like later sets. May sound silly but make sure you are not in the FM mode, lastly see if you can get a TV signal to it rather than relying on seeing a raster, the tuning of the inductor tuner is pretty critical to get a video signal.
aside from all of that, HV prob for HV check then CRT pin voltages for the correct grid and cathode voltages, if you have that it pretty much has to have a raster or at least a line.
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