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Hi, I'm Pete. Welcome to JustAnswer! I'm reviewing your question now, and will post back with your reply ASAP.
What all inputs have you tried?
Does the line always appear in the same place?
Could you attach a photo of the display?
Thanks for the pictures, very helpful.
This type of banding occurs when the Data Driver board fails.
There are actually three data driver boards in this TV set - board C3 controls the left side of the TV, so you will need to replace the C3 Data Driver board.
The board is a long, thin board located near the bottom left corner of the TV set and is connected to the display.
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From the front view
Sure you can!
You can also identify the board by its part number - TNPA5757
Yes it is the board behind the speaker, at the very bottom of the TV set. It is linked to the adjacent TNPA5756 board with a ribbon cable.
You are welcome :)
Hi, just checking in on your question, do you need any further assistance?
Yes it could be caused by a loose ribbon cable or a damaged board or connector on one of the C1/C2/C3 boards.
Did replacing the C3 board fix the original problem?
Ok, have you checked the ribbon cable connections between the boards, and removed and firmly reconnected them?
That's ok, you can check it whenever it suits, and just reply back here any time and let me know.