LG TV 65UC970V Fault

[Marecki]

Hello everybody, I am writing here because I do have problem with my old LG TV. It is working for some time properly and then start scrambling picture for few seconds, and again works fine, and it happens all the time randomly, doesnt matter if it is TV, external video source or even welcome screen. I thought that could be T-CON module so I bought second hand module, which looks exactly the same. Exchanged it and it is even worse, first I thought that module is damaged, so I swapt it for another and I did it three times with the same result. I know that I can give it to proffessional service to fix, but in my reality it will be more expensive than tv value. So might somebody can advice me what to do with it. I attached some pictures to describe situation.
Picture 1. TV with oryginal T-CON module while it works properly
Picture 2 . TV with "new" module
picture 3. oryginal module
picture 4. new module

 

[oiphy]

did you check the t-con cables?

 

[Marecki]

did you check the t-con cables?

Well, the cables seem to be ok. If I install old t-con it works fine for a while, If I install replacement it works as shown on the pictures, it looks like module needs some extra settings, or adjustments.

 

[oiphy]

old t-con sounds like a problem with something getting hot, did you try cooling spray?

 

[Marecki]

No I didn't, might I will have to do that in the morning