Horizontal lines on screen

My LG 42LV5500 television went out this weekend. It was working perfectly (as it has since it was purchased in 2011), but when I turned it off and then on a few minutes later, the screen was black with a bunch of horizontal lines stretching across the screen. There was no popping noise or anything. The sound was still coming through the speakers just fine, though, and the horizontal lines moved up or down or changed colors depending on when the screen image moved.

The lines on the screen take up about 5% of the total screen space, so it is almost entirely black. I was able to get the best image when I changed the input using the remote, so the image I've attached to this questions is of that input screen. I removed the back panel of the TV and didn't notice any obvious abnormalities on the PSU, main board, or t-con board.


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I have the same lines on my screen prints and sometimes on my game which makes me think on my computer that the graphic card is faulty. Modern TVs may also have a graphic card/ chip. Not so much an answer but i have the same problem so if someone can provide more info would appreciate it.

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