lg 42plasma horizontal line

[cadiman]

I picked up another l/g 42 plasma It has a great picture except for two horizontal lines (pin stripe). One is about 6" from the top and the 2nd is about an inch from the bottom. I would guess at the y buffer or connections from y buffer to pdp. I hope the double line is a clue (pattern)?

Cadiman

[NxB]

Re: lg 42plasma horizontal line

There is a service manual in my y board thread. I think it covered this. What is your specific tv.

[Wizard]

Re: lg 42plasma horizontal line

Not necessary. Replace both Y-buffer boards that for that lines. Be GENTLE with unplugging and plugging orange flat cable! Do this before undoing any of the screws holding Y-buffer board in.

Cheers, Wizard

[cadiman]

Re: lg 42plasma horizontal line

I removed the y buffer board (one board) first then removed the flat cable. It was easier to hold the ribbons. These were pretty tight. also as you have said before the 4 leds on the control board only tell you something is running. I have worked on about 5 of these and the last led is never lit up. This is a pdp42x3 made for a vizio. Is this chip failure, connector, or solder failure? Thanks again for your help Wizard!
I will check out said thread. Thanks NxB!
Cadiman

[Wizard]

Re: lg 42plasma horizontal line

IC failure. Blew a buffer for the line. Y-buffer boards are replaced as whole.

Cheers, Wizard

[cadiman]

Re: lg 42plasma horizontal line

I replaced the buffer board and still have the same lines. This can`t be good.

This will make a nice board tester though!

[Wizard]

Re: lg 42plasma horizontal line

Oouch! Still, there are plenty of plasma tv using same panel.

Cheers, Wizard

[mockingbird]

Re: lg 42plasma horizontal line

PDP4273?

I think I have the same model as you, rebranded though.

I'm curious, the spec for this TV says 1024x768... What resolution do you get through the VGA input?

[cadiman]

Re: lg 42plasma horizontal line

The l/g panel is a pdp42x3000 made for vizio. boards are used in lots of models (2006) date code
I will use this panel for some reverse engineering ( a good thing )
This panel is a 720p as far as I can tell. I have made enough money on 6 tvs so I will deal with the 100.00 loss on this one. I will learn alot with this tv now and will gain a great deal of info and training from it. Well worth the 100 bucks! Thanks for all the help!
Cadiman