LG 42LC3R-zh

[redriddick]

Hi Guys,
A friend of mine just gave me one of the above to have a look at.
The screen randomly has all coloured lines running through it but if you turn it off and back on it is fine again for awhile.
When this happens I tried to switch the source from hdmi to tv and when the snow appears the lines go.
Then when I switch back to hdmi you can see the faint lines but after a few minutes they disappear and it is fine again.
Would this be Tcon or main board problem or panel.
Thanks in advance.
Redriddick

[Diah]

Re: LG 42LC3R-zh

when you switched from HDMI to TV or any at the TV, did you used the remote or pressing on the TV control panel ?

[redriddick]

Re: LG 42LC3R-zh

I used the panel at the side of the tv!!

[Diah]

Re: LG 42LC3R-zh

also when this fault show to you try to click on the TV side or up and down smoothly to see if the lines disappear.. if this happen then you have Tab bound . here over the forum many user did video how to fix it.

[redriddick]

Re: LG 42LC3R-zh

CLick the buttons up and down to change channel????
Is that what you mean???

[Diah]

Re: LG 42LC3R-zh

CLick the buttons up and down to change channel????
Is that what you mean???

sorry for the bad typing . with hand hits the TV side smoothly or with finger push the front down forward the screen. if the coloured line changed or disappear.

[redriddick]

Re: LG 42LC3R-zh

No problem I will try that today!!

[redriddick]

Re: LG 42LC3R-zh

No joy with that!!!
Something else I noticed:
I have my laptop connected to the tv via hdmi,when the screen goes white with the coloured lines if I disconnect the hdmi and reconnect the tv displays as normal!!
Surely it would not be a tab bond issue if it does this???

[dick_barton]

Re: LG 42LC3R-zh

Tap the mainboard around the HDMI sockets to see if there's a poor connection such as the shield being poorly soldered. Also check all the screw holding down the mainboard are firmly in place and not loose.

[ReeceyBurger123]

Re: LG 42LC3R-zh

Could be bga solder issue on the cpu, or even bad solder joints on the hdmi ports.

[redriddick]

Re: LG 42LC3R-zh

I think it maybe the hdmi ports as moving the connection up and down brings the picture back.
Now can these be resoldered???

[ReeceyBurger123]

Re: LG 42LC3R-zh

Yes use flux on the pins, and touch them with a timed iron or you could flux the pins and use hot air and reflow it that way.

[redriddick]

Re: LG 42LC3R-zh

Well guys I tried to reflow the hdmi ports at the weekend and it did'nt work.
Maybe I made a balls of it I dont know but might try it again tomorrow night.

[redriddick]

Re: LG 42LC3R-zh

well i tried the scart inputs and had the same problem so does this mean its the main board