LG PDP42V6/ GOODMANS GTV42P3

[tv john]

Hi guys,
Not doing many plasmas due to the price of panels.
This plasma has no pic and audio is ok. I have changed ysus,15v is ok at c72,Va & Vs are ok,ysus is cold and zsus ic is slightly warm. I have discon both lower and upper buffers,one at a time and still no flicker.Also discon zsus.
Any clues fellow diode modulators?
Thanks John