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.

I can hear the sound but not the actual video. only vertical lines.

Thanks