Sony KD-65x7500D - double image - Tcon or Panel?

[rimwall]

This TV was showing a fine image and pulsing with a partial double image (offset vertically) every few seconds. I taped 8 clock pins on one ribbon cable from the Tcon to the panel. It stopped the double image, but some pulsing in intensity was still visible. I then taped another 8 clock pins on the same ribbon cable and the image is now ‘fixed’. Although I understand this results in some loss of resolution, presumably because the clock signal degrades as it passes horizontally across the screen.

I am wondering - do these symptoms and ‘fix’ mean that it’s a Tcon fault or a panel fault? Is there a way to diagnose where the fault is?

Thanks!