Yeah, that's what I was getting at. Some of those Sonys (and LG, Samsung) have a "tab bond" issue. That's a failure of the bond of the upper ribbon cable to either the circuit board that is inside the top of the frame, or (most likely) the bond to the LCD panel itself.
When I was fixing flat-panels for a living we'd call those models "punchers". Because if you gave them a light punch on the upper right corner, they'd usually straighten out for a while.
I usually just parted them out at that point. I didn't have the tools to reliably repair a bond. Most of us don't
