I found on one long Back Light Inverter Board on the left side of my TV. where is other one?
SOURCE: Toshiba 57LX177: Right side of screen darker than left
I am not sure...but I have the identical problem. I believe the vertical lines are caused by the inverter board and the darkness is caused by the one of the back lights that needs to be replaced. I am tearing my unit apart now and will find out.
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