Lg plasma model# ru-42px11

I am working on an LG PLASMA MODEL# RU-42PX11 .
Voltages on the Power Supply to each board are good..
Vertical bars,lines with snow.

Seems to be the small signal board that has the tuner on it.
All inputs have same issue,when i hook up the rgb or pc input
good audio input,nice clear video of vertical lines, yes top to bottom.
this tv the pc input and component inputs are two different boards.

I can see video source switching,and on coax for cable input good audio,get the snow and bars and...