Display intermittently has rolling lines

Oh bummer, thanks for the info.

Any reason you don’t think it’s the cable given the problem is intermittent and sometimes fixes itself when I move or twist the body and/or hinge?

@jamesbartle - The signaling system is radically different so if the cable was the issue it wouldn't offer an image.

Think of it this way your radio is set for a AM station but the band selector is bad and jumps to FM band but the location on the FM side has not station so your radio goes from a working AM station to dead air on the FM side. This is like how Digital TV works it works, it just works or doesn't (eDP). Now let's say your AM radios tuner drifts the signal gets garbled (LVDS).

This issues is strictly something in the scanning of the image to the LCD which is done within the T-CON board. Somehow the circuit breaks down just enough to lose its timing. As its only on your internal display its got to be within the display assembly Vs the GPU logic.

I'll admit I have not encounter this before, but there's enough clues here to tell us what part is failing. The other direction would be a problem within the MUX logic on the logic board. I have never seen any scanning defect originating from it, I have only seen T-CON issues.