LG - 55LS4500 - Vertical Lines

[letmefixit]

Hi,

I need help to resolve this issue.

TV : 55LS4500
Issue : Vertical lines end to end.

When i switch on, power LED (RED) blinks 3 times and the vertical lines show up and stays. I replaced the t-con board today but still having issues. No sound.

Thanks

[letmefixit]

Re: LG - 55LS4500 - Vertical Lines

Can you please help me ?

Thanks

[letmefixit]

Re: LG - 55LS4500 - Vertical Lines

Any direction to identify this issue ?

[nomoresonys]

Re: LG - 55LS4500 - Vertical Lines

So you get the same display and no sound with both tcons?

[letmefixit]

Re: LG - 55LS4500 - Vertical Lines

So you get the same display and no sound with both tcons?

Yes. Same vertical lines pattern.

[letmefixit]

Re: LG - 55LS4500 - Vertical Lines

Yes. Same vertical lines pattern.

Update (9/29/2020) : I connected a different HDMI cable to the dvd player and now I can hear the sound. The vertical lines still remain.

[qmich]

Re: LG - 55LS4500 - Vertical Lines

remove one by one flexs the right flex from tcon to the screen and check if the left half of the screen is good and the same way with the left side.then check vgh and vgl voltages.good luck.

[letmefixit]

Re: LG - 55LS4500 - Vertical Lines

remove one by one flexs the right flex from tcon to the screen and check if the left half of the screen is good and the same way with the left side.then check vgh and vgl voltages.good luck.

With the DVD playing,

1) Both ribbon cables attached to t-con : multi colored vertical lines on the screen

2) If I remove the right ribbon cable alone from t-con, then the right half screen becomes white and left still has stripes.

30 If I remove the left ribbon cable alone from the t-con, the left half screen becomes white and the right still has the stripes.

I didn't check the voltage yet. I will do that tomorrow.

Thanks

[Davi.p]

Re: LG - 55LS4500 - Vertical Lines

1. Don't ask for replies every few hours, this is not a call center.
2. Don't make pictures with the shadow of your hands/head.
3. 90% is a CPU soldering problem so try a reflow, if it improves ask for a reballing.

[letmefixit]

Re: LG - 55LS4500 - Vertical Lines

Checked the voltage.

fuse : 12v
VDD : 16.9v
VGH : 26.7v
VGL : -6.9v
VCOM : 7.9v

thanks