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LG TV: image = No. sound = Yes

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Snuf3:
Hi again
I saw some videos out there about the T con , fuse and some tests... But My T con doesnt look like a T con and it seems like I have 2 of them.
I attched some photos. You can see that the T con has the width of all the screen and also that I have two of them
Is this the T con? I am not really sure
Thnx

Snuf3:
Well I guess that what I called the mother board is the T con but I want to aboard another subject.
I saw a video of someone who manage to FIX the problem by taking a pen and painting over the cable and blocking pins
When I do it I see that the right cable presnet half white screen image (dim, not strong white)
and the left one show no image. So I  think that the cables may be the problem.
Here is the video. I find his solution orginal. I can't do it myself since he didn't explained it in English
https://www.youtube.com/watch?v=NVyX5r_nPi8

downunder:

I see what you mean re T-Con - must be incorporated into the main board -copying Samsung. The panel itself may well be the problem. A defect on one half can cause the entire screen to blank out. May do well to try the "block-off" method in the video. Not sure what the artistry  was about but he was actually using sticky tape to isolate (block off) some of the contacts on the flexi cable.

Maybe he was lucky, or found the defective line before he made the video, because I spent 3 days last week on a similar Samsung 65 inch trying to achieve a similar outcome. Eventually I had to scrap it. An additional problem with the Samsung is that if you remove either flexi, the TV will not start. Good luck - Bruce

Snuf3:
Thanks Bruce.
your answers help me and motivate me to not give up.
You said that a defect in one half can cause this problem and this is what I am going to check
Is there a way to isolate the source of the problem?
Can I do a test to see if it's the cable that is the source?
maybe to switch the right with the left?
My goal is to eliminate component by component till I find the problem.
(I am starting with the cable since it's the comp. that is less complex) .

Thnx

downunder:

Hi Snuf3. You can try removing one of the two flexi cables (LVDS cables) while the TV is OFF. Switch on and observe the screen. If the panel is OK you should get a clean white screen on half the panel (disconnected side). Then refit the flexi and disconnect the second one and power on again.
Report your results. This works on conventional LED TVs that have a separate T-Con but some TVs like the Samsung with no T-Con board cannot be tested this way because an SOS signal is generated via the LVDS cables to disable the TV.

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