LG 42LK450 no video

[pac.attack76]

Turns on, all front controls work, sound works, video inputs seem to work as I've tried two different inputs and sound works. Backlight is on. No video. Is this a t con issue?

[damen]

Can be, or bad screen. If there are two ribbon cables from the screen to the T-con, disconnect them one at a time and see if you get half a picture with only one connected at a time

[kf4rca]

Here's the link to the manual:
https://elektrotanya.com/lg_42lk450-.../download.html

[pac.attack76]

Originally Posted by damen

Can be, or bad screen. If there are two ribbon cables from the screen to the T-con, disconnect them one at a time and see if you get half a picture with only one connected at a time

Disconnected left cable. Got half pic on left side. Disconnected right side, got nothing.

[damen]

Bad screen. There are threads about people actually isolating which connection on the bad side ribbon cable is causing the problem, but I've never tried to do it.

[kf4rca]

Both sides of the screen no video? I would look at the TCon board first. Something common to both sides.

[pac.attack76]

Originally Posted by kf4rca

Both sides of the screen no video? I would look at the TCon board first. Something common to both sides.

Left side works. No right.

[JohnCT]

Originally Posted by pac.attack76

Left side works. No right.

There is a "tape" method to isolate the X driver from the bad side (strangely, the display will still run with the other side driving).

There must be youtube videos about adding a small bit of tape under the ribbon cable.

The other way is to remove the front mask to expose the side ribbon tabs on the bad side. With a *new* XActo blade, cleanly cut off all the ribbon tabs on the bad side. Careful not to pull the tab while cutting - it's got to be clean.

The tape method is safer and reversible, the cut method is 100% but not reversible if the ribbon is pulled on the display.

My 70" Sharp is running with one side after I cut off the other side tabs.

John