LG tv led video problem.

[Serge 125]

Hi all!!

Ok I just got this tv FREE from someone and he did told me of a video problem and even turned it on to show me and yes it does have a problem. He told me that it worked great the night before and next morning this problem. So can this be an easy fix or.... It's an LG 42LV5400-UB. So any thought or suggestions are welcomed!!

THANKS ALL!!

Serge

 

[Nigel Goodwin]

As almost always, it looks like a fault on the LCD panel itself, or associated PCB's (which come as part of the panel).

 

[Serge 125]

Fixable or can I get replacement part?

 

[Pommie]

I had a few "different" colour (greenish) lines down my telly. After about 5 years of these (I think 3 lines) I tripped one day and knocked it over. Been perfect ever since \o/. Guessing edge connectors on the display so probably not your problem.

Mike.

 

[Nigel Goodwin]

Fixable or can I get replacement part?

If you can find a good secondhand screen, otherwise no - FAR too expensive, even assuming a new screen is available?.

 

[Serge 125]

Hmm since it’s an lcd screen it reminds me of fixing lcd calculator screens that has poor ribbon connections and some numbers wouldn’t appear right so it looks like it’s kinda the same thing happening here, is it possible?

 

[Nigel Goodwin]

Hmm since it’s an lcd screen it reminds me of fixing lcd calculator screens that has poor ribbon connections and some numbers wouldn’t appear right so it looks like it’s kinda the same thing happening here, is it possible?

As a previous professional repairer of TV's, the LCD panel is a single component - and should be replaced as such.

However, there have been some 'bodgers' who wedge foreign objects inside the screen to try and correct poor connections - this can sometimes provide a 'cure', at least short term.

However, I don't think this fault is a 'poor contact' issue - 'possibly' it could be the T-Con board, assuming the panel uses a separate one? - this is part of the LCD panel, but 'sometimes' was available as a spare part (but an expensive one).

 

[Serge 125]

Is there a way to check the t-con board to make sure that it isn’t the problem? I’ve got tools here to do this but just need guidance on where to check or probe components. I haven’t opened the back panel yet but tomorrow I may have more time to do it. By doing this I could eliminate the t-con board if it’s ok. Hey I’m willing to try anything to save this tv (if I can).
Thanks!!!

 

[Nigel Goodwin]

Is there a way to check the t-con board to make sure that it isn’t the problem? I’ve got tools here to do this but just need guidance on where to check or probe components. I haven’t opened the back panel yet but tomorrow I may have more time to do it. By doing this I could eliminate the t-con board if it’s ok. Hey I’m willing to try anything to save this tv (if I can).
Thanks!!!

You take the T-Con board out of an identical good working set (with an identical screen in it), and try it in this one.

 

[Serge 125]

I don’t have access to a working t-con board dit do this.

 

[Nigel Goodwin]

I don’t have access to a working t-con board dit do this.

That's always the HUGE problem!.

 

[Serge 125]

Hi again. Here's 2 videos of what the screen does.