Hey guys I have a LG flat screen I got from my boss from Christmas. When I got it home and plugged it in it had flickering horizontal lines. I asked my boss about it and he said it would usually do that before it warmed up. It does it on all channels and inputs. Sometimes when I turn the TV on the screen will light up but still be black and I can hear sound but no picture. I don't know if the problems are related but is there any ideas on how to figure out exactly what part needs be replaced. I also considered maybe when I moved it I just shook something loose but idk any help is appreciated and thank you in advance. Also I included a screen shot of the lines since I could not upload the video. They just flicker and the more vivid or brighter the picture the worse the lines are.
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