While I agree it could be the screen, the driver electronics could also be the problem. In any case the repair is probably more than you want to spend unless you are going to DIY, Unfortunately it appears these have become throw away devices.
You could try calling Bob's TV, I think they are the closest TV repair shop, no idea if there is a charge to determine id bad component.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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