panasonic viera red half screen

[wreksta]

hi im doingf this for a friend just trying to find out what causes the red screen
ive enclosed a picture

[tom66]

Re: panasonic viera red half screen

Model number would be helpful. If Z80/Z70/X80/X70 series Viera loose LVDS can cause this...

[wreksta]

Re: panasonic viera red half screen

th-42pz85b cheers tom

[tom66]

Re: panasonic viera red half screen

check cable between A & D fixes this 99% of time.

[wreksta]

Re: panasonic viera red half screen

Been to ladies house today and had a look jesus those wires n clips are a pain
anyways couldnt get screen to sort it self out did notice if i messed with ldvs cable the screen on the left the one that was reddish would go green white etc so suspect ldvs board and cable


any thoughts

[tom66]

Re: panasonic viera red half screen

Usually on the bottom end. Cable is fine, in most cases, but the connection comes loose. I am watching a 46" Viera that I fixed with same issue. Once you get connection right it stays, suggest unclipping and reclipping connector.

[wreksta]

Re: panasonic viera red half screen

tried and tried ldvs makes cicking or screen does certain ways of cable is it worth getting another ldvs board ? can no test be done to rule that out
is there other things to try thing is I just got giving it and its a nice set

also the ymain when powered down sound like its having a hissy fit sort of like an amp noise funny to say more like a laser gun noise lol

[tom66]

Re: panasonic viera red half screen

It is probably not LVDS board. Maybe you need a new LVDS cable.
The SC (similar to Y-main) board can sometimes make noise when powered off, this is normal.

[wreksta]

Re: panasonic viera red half screen

tel you what ill test the ldvs cable both sides I think

[tom66]

Re: panasonic viera red half screen

How?

[wreksta]

Re: panasonic viera red half screen

I messed around got a screen almost perfect tom had few coloured lines on the left part of screen then started making a clicking noise whist screen flashed then went off is this normal

[wreksta]

Re: panasonic viera red half screen

How?

dunno checked cable seems impossible

[wreksta]

Re: panasonic viera red half screen

tom whats causing this clicking want me to up a vid of it starts off not to bad then gets a red boarder starts flashing and clicking then turns off

[tom66]

Re: panasonic viera red half screen

Uhh. I have no idea. I'd be careful if you have pixel vertical lines. Can be sign panel is bad. I didn't reseat cable with unit running due to risk of panel damage. It's a bad idea to reseat cables with anything running can cause lots of problems.

[wreksta]

Re: panasonic viera red half screen

I didn't mate I turned it off first heres a video
http://s2.photobucket.com/user/wreks...021-1.mp4.html

don't think there pixel vertical lines mate cant I do screen patterns in service to tell me if panel good whats the procedure

[tom66]

Re: panasonic viera red half screen

You can:
Hold VOL- on set and press 0 three times on remote. Release VOL-.
Wait some seconds... screen should flicker and service menu should pop up.
Press RED twice to get initial pattern then RED for each subsequent pattern. Note some patterns are generated by A board, but most by D board.

[wreksta]

Re: panasonic viera red half screen

hi tom just did above test problem is still there
these are not lines like pixel lines they are flashes of different colours etc

do you think vid board is naffed can you test this at all

[wreksta]

Re: panasonic viera red half screen

I got a sneaky feeling the vs va and other voltages are not correct haven't tested these yet that ymain noise is quite alrarming but ill bite the bullet if you say I should

[tom66]

Re: panasonic viera red half screen

If you got those lines with the D board tests, the D board is bad.

The Vs and Vda(=Va) would not cause this. Whatever you do, do NOT touch Vda or you can kill the panel! The -Vad, Vscn and Ve cannot cause this either. Neither can buffer boards SU/SD or sustain/scan board SC or sustain SS. It's between A & D and given you isolated A, by doing testpatterns (and all showed noise right?) the D is bad.

[wreksta]

Re: panasonic viera red half screen

so replace dboard or fix is there anything obvious to test mate is the d board the main av

cant I heat parts up to see if affected area can be mended