LG 50PA4500 dark grey with black horizontal lines(bottom)

[Samuelo]

Hello,

Model 50PA4500-ZM

After plug in=> short screen flashes white then dark grey with horizontal lines at the bottom.

No Picture, no sound
No control with remote control
Standby LED all the time red
Main Board LED red
logic Board LED blinks long, short, pause

Test Paddern(Bridge on logic Board) works fine but with horizontal lines

Thanks for helping

[tom66]

Re: LG 50PA4500 dark grey with black horizontal lines(bottom)

Two possibilities:
- Loose ribbon cable for that part of the panel
- Bad plasma panel... damage to ribbon cable due to mis-placement of the plastic nubs on the frame (design flaw of the PA & PM series LG plasmas.)

[Samuelo]

Re: LG 50PA4500 dark grey with black horizontal lines(bottom)

Thank you,

for reply so fast!

I'm not able to open the connector for this ribbon cable. The plastic to open up is broken.
I don't understand why the standby led stays red and i can't remote it?
Could you help me to understand?

sorry for my English

[tw2005]

Re: LG 50PA4500 dark grey with black horizontal lines(bottom)

From what i read if the test patterns operate then the mainboard would be suspect which would explain why you have no control. If you can't operate the latch to reseat and latch that bottom ribbon correctly then you'll have to source a replacement buffer.

Those lines do look like a typical poorly seated panel ribbon to buffer connection

[Samuelo]

Re: LG 50PA4500 dark grey with black horizontal lines(bottom)

During the test paddern the psu goes klicking. Disconnecting the ysus stops klicking.

So i stop trying to repair. I think the price to repair it, is to high.


Thank you for helping!