I recognize that this is an old question. Horizontal lines are almost exclusively caused by failed Gate drivers on the panel. They are part of the panel and can not easily replaced (requires special equipment). You can always check the small ribbon cables that connect from the driver board (part of the panel) to the LCD. Those flat ribbon cables are bonded to the panel. Push on the ribbon cable that corresponds to the location of the line. If that line changes or disappears it is a failed bond. Should the line be unchanged it is the actual gate driver for that region which has failed. this is not a board failure, but a panel issue.
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I recognize that this is an old question. Horizontal lines are almost exclusively caused by failed Gate drivers on the panel. They are part of the panel and can not easily replaced (requires special equipment). You can always check the small ribbon cables that connect from the driver board (part of the panel) to the LCD panel itself. Those flat ribbon cables are bonded to the panel. Push on the ribbon cable that corresponds to the location of the line. If that line changes or disappears it is a failed bond. Should the line be unchanged it is the actual gate driver for that region which has failed. this is not a board failure, but a panel issue.
I recognize that this is an old question. Horizontal lines are almost exclusively caused by failed Gate drivers on the panel. They are part of the panel and can not easily replaced (requires special equipment). You can always check the small ribbon cables that connect from the driver board (part of the panel) to the LCD. Those flat ribbon cables are bonded to the panel. Push on the ribbon cable that corresponds to the location of the line. If that line changes or disappears it is a failed bond. Should the line be unchanged it is the actual gate driver for that region which has failed. this is not a board failure, but a panel issue.