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I believe I have some modules for that chassis if you need one. Can you tell if the set has high voltage? If there is no HV; it could be a power supply problem, a problem with the horizontal oscillator or drive circuits, or horizontal output circuit (tripler, flyback, etc). If you have HV, try pulling the service switch on the back of the set to see if you can get a line on the screen. Cleaning the service switch with control cleaner may help. You could also have a defective vertical module or video module. I'll see if I have a Sams Photofact for that chassis.
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