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My Samsung has faint white horizontal lines running through 3/4 of the TV every thing else works fine, I changed the TCON board but nothing changed. Any ideas on this before I change the video board.

@bigjets horizontal lines are never caused by a bad t-con board. Unlikely that this is even a main board issue. Horizontal lines are most commonly caused by a failed panel (failed Gate Drivers). Post some images of your boards with your question so we can see what you see. Use this guide Adding images to an existing question for that. Let us know the exact model of your TV

I have the same tv. Same issue. Any suggestions??? See photo.