Samsung pn51d450a2d horizontal lines on the screen

[MRX37]

It's been awhile since I've done anything TV repair related. But this TV was a rescue. The guy threw it out carefully, meaning he made sure to set it some place out of the snow, and wrapped the cord around the base, the screen facing passers by on the street...

And well, I had to rescue it.

So the TV works, but it has horizontal lines running across the screen, a band of them that show up in menus. I could get pictures but really there's nothing more to say.

I did some googling and tried reseating all the ribbon cables but nothing changed. Now I'm trying to find out what went wrong and if it's worth my time to try and fix a 720p Plasma TV from 2011.

The good news is apart from the lines the display looked nice and bright, and taking the back off revealed clean looking parts with no obvious signs of heat damage or bad caps.