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How to clear the 2 vertical lines on the screen

My TV screen has two vertical lines on both sides of the screen ,making it smaller than normal.

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HUMPHREY MARODZA  first let’s clarify that you do have a LG 17LX1R. Then you need to make sure that your aspect ratio is set properly. Go through your TV menu and check on that. If all of that checks out okay it could be an issue with the main board

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