IMPORTANT: This article applies only to specific products and/or operating systems. Check the Applicable Products and Categories section of this article for details.
The line you see is part of the inspection operation of the Panel Refresh function. When the Panel Refresh function is performed, after about 1 hour, a line will move from the top to the bottom of the screen to check the pixel condition of the TV screen.
Note: The line can be white, red, green, or blue, depending on the model.