lg 32lg3000 white screen faint picture

[flocko]

Hi all well here we go again picked this up and thought a new t-con board would sort it but no luck, so heres what i have powers up ,backlight on, sound on, picture faint will run though all menus but all with no colour and negative image, I am running it off a dvd and it runs though both the scart sockets, here are some photos to start with any help will be very gratefully received thanks in advance

[selldoor]

Re: lg 32lg3000 white screen faint picture

Check for fuses on the tcon and clean the connectors tcon to panel.
Perhaps a picture of the faded picture would help.

[flocko]

Re: lg 32lg3000 white screen faint picture

not a very good photo of screen to make it show i had to take it from the side, i get the same picture with the old and new T-con cards did clean up the ribbons when i changed the cards, will check lead and plugs t-con to av with meter next then pull the av board and have a good look at that

[tom66]

Re: lg 32lg3000 white screen faint picture

This could be a bad panel. Not 100%, but we have seen faint dark picture indicate a bad panel before. It is sometimes fixable. The only board that could cause this in my opinion would be the T-con, but you have replaced that.

[flocko]

Re: lg 32lg3000 white screen faint picture

had a look with av board out c112 (top left in line with white socket) looks a bit sad and some around it dont look to good, were can you get this type of cap have not replaced these before?

[tom66]

Re: lg 32lg3000 white screen faint picture

The AV board could only produce this effect if the contrast etc. were set wrong but usually the menus/OSD are always visible even with wrong contrast.

[flocko]

Re: lg 32lg3000 white screen faint picture

Hi Tom every thing seams to be working on the menus i can increase contrast up /down,backlight, brightness, but not colour. Does the av not feed the T-con its info to power the screen and is there a way to check the T-con has the right supplys from the av thanks for your help

[selldoor]

Re: lg 32lg3000 white screen faint picture

Is there a factory reset in the menu?

Have you found if you can get into the Service menue with a buttton press

[selldoor]

Re: lg 32lg3000 white screen faint picture

There are sometimes places on the tcon where you can check voltages marked like c5v c3v and so on also if there is a fuse on the tcon that is usually on the feed from the main board so you could check the voltage on that.

[tom66]

Re: lg 32lg3000 white screen faint picture

Wait, so you can see the menus easily and clearly? Can you show us what they look like?

[selldoor]

Re: lg 32lg3000 white screen faint picture

had a look with av board out c112 (top left in line with white socket) looks a bit sad and some around it dont look to good, were can you get this type of cap have not replaced these before?

RS online have some - not checked sizes
http://uk.rs-online.com/web/c/passiv...unt+capacitors

[tom66]

Re: lg 32lg3000 white screen faint picture

To access service menu on LG:

Power on
Hold MENU on remote
Hold MENU on TV (at same time as remote)
Wait 5~10 seconds

[flocko]

Re: lg 32lg3000 white screen faint picture

no the same washed out picture, what about the caps on the av board will these not be a problem i have found replacements Conrads have them,I will take photo of t_con board and post

[flocko]

Re: lg 32lg3000 white screen faint picture

photo front and back t-con broard will have to refit boards to set before i can get service menu up

[tom66]

Re: lg 32lg3000 white screen faint picture

It would be very unusual for a main board to cause that distortion.
It is likely the panel, it may be repairable.

[selldoor]

Re: lg 32lg3000 white screen faint picture

The fuse is at F1 - when you have it connected you can test the voltage. Cant see any marked voltage test points. I think they are all together just above the processor but the label doesnt have any values.

[tom66]

Re: lg 32lg3000 white screen faint picture

He is getting some picture, so it cannot be the fuse.

It could be low 12V/5V applied to T-con, would be unusual but it might be possible...

[flocko]

Re: lg 32lg3000 white screen faint picture

Yes see were you mean lv0/1/2/3/4/5/6 lv0+/1+/2+/3+/4+/5+/6+ what about gsp.gsc/goe/pol/soe far right at top what am i looking for volt wise dc under 24 or more

[tom66]

Re: lg 32lg3000 white screen faint picture

At fuse "F1" marked TK what voltage are you seeing either side of it?

[flocko]

Re: lg 32lg3000 white screen faint picture

12.36v each side of fuse i had a look at the test points but there so small i think i would short them out if i put a meter on them