LG 55LE5400 Nice TV BackLights Only Half Picture...

[Michale32086]

Got a nice LG in...

With everything hooked up, I get backlights but no image..

That tells me that the Power PCB and the middle (Inverter??) board are probably doing their jobs...

There is no TCON board. The Main board LVDS cables (pair) go directly into the display panel's "buffers"??...

Now, when I unhook the right LVDS cable, I do get the normal LG image on half the screen.. It appears to be faint, but I am thinking that is likely just due to a menu setting as opposed to an indicative problem..

A replacement Main Board is spendy, but worth it if it fixes the TV.. But if it's the panel buffer that's bad, then I don't want to waste the $$$ on a replacement Main board..

[vinceroger69]

Re: LG 55LE5400 Nice TV BackLights Only Half Picture...

possible shorted smd capacitor on the lcd panel pcb on the side that shows no picture there has been a couple of threads with a smd cap causing issue like this

[Michale32086]

Re: LG 55LE5400 Nice TV BackLights Only Half Picture...

possible shorted smd capacitor on the lcd panel pcb on the side that shows no picture there has been a couple of threads with a smd cap causing issue like this

I was afraid of that... I never have any good luck with fiddling with the panel PCBs...

Thanx for the reply..

[diif]

Re: LG 55LE5400 Nice TV BackLights Only Half Picture...

I was afraid of that... I never have any good luck with fiddling with the panel PCBs...

Thanx for the reply..

You have nothing to loose apart from a little time.
Check the caps for shorts in diode mode. You might get lucky and it just be a cap or it could be a shorted COF as was my case.

[zomi]

Re: LG 55LE5400 Nice TV BackLights Only Half Picture...

check the caps
if u find more than one shorted remove one by one and check once they are removed
normally u just have one that is shorted and the rest on the same line are fine.
heat ethier side one cap bath and forth with hot iron and then nudge off with tweezers

[Michale32086]

Re: LG 55LE5400 Nice TV BackLights Only Half Picture...

You have nothing to loose apart from a little time.
Check the caps for shorts in diode mode. You might get lucky and it just be a cap or it could be a shorted COF as was my case.

Yea, time is the big factor around here.. The LVDS cables look pretty scraggley on the ends. I am hoping that's the problem, but have swapped out diff ones and no help.

So I have a feeling it is the panel boards..

Putting it aside til I have a full day..

Thanx

[Michale32086]

Re: LG 55LE5400 Nice TV BackLights Only Half Picture...

check the caps
if u find more than one shorted remove one by one and check once they are removed
normally u just have one that is shorted and the rest on the same line are fine.
heat ethier side one cap bath and forth with hot iron and then nudge off with tweezers

Thanx.. I'll give that a try