50PG25 plasma screen garbage (pictures)

[Cailloux]

Hi, I need your opinion. LG Plasma TV 50PG25.
Two y-buffer in place as pictured. With no input signal, the result show on second picture. On the screen, a missing part of the top and the balance of garbage.
If I remove the upper buffer, I get down half a screen, a raster low intensity, no missing horizontal lines. I know the upper buffer is defective, the chip on top is very warm.
Menu on screen show also garbage.

My question: Is the upper buffer is solely responsible for the garbage on the screen? and possibly another faulty board (y-sus, ctrl)?
Thanks

[tom66]

Re: 50PG25 plasma screen garbage (pictures)

Yes, that looks entirely to me like that one upper buffer IC is causing the fault. The signal is chained from each IC so a fault with the top IC will cause all other ICs to produce garbage.

[Cailloux]

Re: 50PG25 plasma screen garbage (pictures)

The signal is chained from each IC . This is what I wanted to know.
Thanks Tom

[chubby]

Re: 50PG25 plasma screen garbage (pictures)

hello i have a 42inch LG PDP42v6 have sound no picture
check all caps ok change the main board still no picture

[tom66]

Re: 50PG25 plasma screen garbage (pictures)

PLEASE for the love of all that is holy, put your query in a separate thread, not in some random thread!