Daytek 42'' Plasma TV flickers bright and...

Ok, it's my turn to ask for help.
I have a Daytek 42'' plasma TV for service. There is no service manual available for it. It uses an LG panel.

The x-driver PCB was shorted. Lucky we had a used one here in stock. Iinstalled it, but now the TV flickers bright and dark. When it's darkit almost looks like a negitive image, but will flicker bright againand look good before flickering back to dark. I have replaced the powersupply board, and I am about to try a main board, however there areseveral pots on the Y-driver board (5 pots), and I have a feeling itmight be an adjustment. There is also a pot on the x-driver board, Imarked it and tried adjusting but it made no difference at all. I putit back to the factory position.

Any ideas would be appreciated.