What happend to my tv?

hello there! so we moved to our new house and i mounted our tv on a wall and then when i turned it on,it was like i could see every pixel! the quality was really low idk like Hdcam!(which ppl record at movie theaters with their camera ) i tried resetting+changing settings and nothing seems to work what should i... show more hello there! so we moved to our new house and i mounted our tv on a wall and then when i turned it on,it was like i could see every pixel! the quality was really low idk like Hdcam!(which ppl record at movie theaters with their camera ) i tried resetting+changing settings and nothing seems to work what should i do??thanks in advance
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