LG PDP50X2 plasma tv bad picture with full screen. BAD panel ???

[moises_k]

hello
this unit is having some strange problem :
there is a picture , but when there is a bright picture , the screen is separated into two halves . top and bottom .
from the top of each half there is noise spreading down the screen.

when there is a small picture on the screen , it is looking good.
I tried to calibrate voltages , and could make it better by raising the Vs ( and tweaking other voltages) but it never disappeared totally.

is this a bad panel ?

[ReeceyBurger123]

Re: LG PDP50X2 plasma tv bad picture with full screen. BAD panel ???

Looks like control board or motherboard to me, ran the test patterns ? Also the panels wont fail in that way at all so rule that out now. Also the image looks very grainy to me from the pictures is it ?

[Andrew F. Ali]

Re: LG PDP50X2 plasma tv bad picture with full screen. BAD panel ???

I would go with a Control board issue at first look....However, the test patterns should narrow it down..

[moises_k]

Re: LG PDP50X2 plasma tv bad picture with full screen. BAD panel ???

thanks for the reply

on that control board there is a connector P5 , (4 pin near the lvds connector)
is that the place to short for the test pattern?
if so , do you remember which pins to short ?

[maxvalutech]

Re: LG PDP50X2 plasma tv bad picture with full screen. BAD panel ???

Is it 4 pins in a square pattern if so I have read short top 2 pins together.

[moises_k]

Re: LG PDP50X2 plasma tv bad picture with full screen. BAD panel ???

this is most of the control board .
the p5 connector is white color , on the right side. (next to p100)

I have noticed that when the problem occur , there is a different output wave at the Y-SUS output. (it's like when there is a black picture / no input)

do not know how to activate the internal test pattern.