You didn't specify whether the flashing line was a vertical or horizontal line.
Here's the [document|40717|service manual] that may help.
Go to p.66 thru p.70 (of 78 pdf) to view the images of problems seen on the screen and check if you can find one that is close to what the problem is in your TV. The image seen on the display indicates where the problem is.
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It seems more like a screen problem (known as ''module'' in the manual) more than a power board problem.
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It seems more like a screen problem (known as ''module'' in the manual) more than a power board problem, although it could be a mainboard problem also.
Hi @gscott46993
You didn't specify whether the flashing line was a vertical or horizontal line.
Here's the [document|40717|service manual] that may help.
Go to p.66 thru p.70 (of 78 pdf) to view the images of problems seen on the screen and check if you can find one that is close to what the problem is in your TV. The image seen on the display indicates where the problem is.
It seems more like a screen problem (known as ''module'' in the manual) more than a power board problem.