Do a reset to this TV, and then check. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts.
https://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.
I work fixing TVs, and am a Samsung authorized servicer. Outside of doing the best thing, which would be to take it to a repair shop, it needs a Main board. The power supply is fine or it wouldn't make any picture, and cleaning something won't fix it.
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How can i fix a westingouse (wisdon-share) smart cloud tv
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