THOMSON / TCL 43UC6406 jumping image

[worlor]

Hello everyone
I got a Thomson (TCL rebrand) 43UC6406 television with a jumping image problem.
I have replaced the t-con board, but the problem continues ...

I have make a video :https://youtu.be/v1Y_QfifP-E

The motherboard nor his components are damaged

I don't know what search next ? Can it be the LCD ? How can I check this ?

Thanks for helping me save this !

[Diah]

Re: THOMSON / TCL 43UC6406 jumping image

disconnect one ribbon cable at time ( the cable between t-con and panel) then turn on check if you have clear half screen..

[worlor]

Re: THOMSON / TCL 43UC6406 jumping image

No I haven't clear half screen. See attached pictures.

[Diah]

Re: THOMSON / TCL 43UC6406 jumping image

bad panel.

[worlor]

Re: THOMSON / TCL 43UC6406 jumping image

bad panel.

[Diah]

Re: THOMSON / TCL 43UC6406 jumping image

take out the speaker and the metal plate to have access to the panel edge boards... take look there if you are lucky you could find visible issue

[worlor]

Re: THOMSON / TCL 43UC6406 jumping image

No visible issue ...

[Diah]

Re: THOMSON / TCL 43UC6406 jumping image

No visible issue ...

take out the both ribbon cable out and inspect them under loop if there any damage at the pins contact.. after inspection and they are fine put them back but the long blue area should be at T-CON side.. not as its now.

also inspect the LVDS cable from the mainboards side.. dont forget to take the main boards out side the set and clean it very well from the dust it have from both side.

[worlor]

Re: THOMSON / TCL 43UC6406 jumping image

take out the both ribbon cable out and inspect them under loop if there any damage at the pins contact.. after inspection and they are fine put them back but the long blue area should be at T-CON side.. not as its now.

also inspect the LVDS cable from the mainboards side.. dont forget to take the main boards out side the set and clean it very well from the dust it have from both side.

I cleaned everything and the ribbons cable are OK.
When I connect only right side of the screen, I got a half-screen white and the other black, on the white side there is black line and the "jumping" effect is present on the right side. When I connect only the left side of the screen, just a half white screen. I have tried swaping the two ribbon cable -> same result.
No changes when I move gently the board when screen on.

Also, the t-con get very hot.

[Diah]

Re: THOMSON / TCL 43UC6406 jumping image

I cleaned everything and the ribbons cable are OK.
When I connect only right side of the screen, I got a half-screen white and the other black, on the white side there is black line and the "jumping" effect is present on the right side. When I connect only the left side of the screen, just a half white screen. I have tried swaping the two ribbon cable -> same result.
No changes when I move gently the board when screen on.

Also, the t-con get very hot.

yours photos on post #3 when you disconnect one side ribbon are different from yours last photos after you inspect the cable !!!!!! ????
how it come?? are you sure the ribbon are fine???

[worlor]

Re: THOMSON / TCL 43UC6406 jumping image

yours photos on post #3 when you disconnect one side ribbon are different from yours last photos after you inspect the cable !!!!!! ????
how it come?? are you sure the ribbon are fine???

On post #3 there was a boot logo when I boot up the TV with the 2 ribbon cable. Now the screen is completely black. I don't know why.
The boot up process work because the leds lights up then down

[Diah]

Re: THOMSON / TCL 43UC6406 jumping image

On post #3 there was a boot logo when I boot up the TV with the 2 ribbon cable. Now the screen is completely black. I don't know why.
The boot up process work because the leds lights up then down

so the actual T-CON toasted !!!

[worlor]

Re: THOMSON / TCL 43UC6406 jumping image

I have tried with the other one and black screen too :/

[Diah]

Re: THOMSON / TCL 43UC6406 jumping image

I have tried with the other one and black screen too :/

you removed the main boards to cleaning the dust as i asked you... right ??? then you need to check if you did missed some things at MB

[sigmeyer]

Re: THOMSON / TCL 43UC6406 jumping image

I saw a video online where some indian dude was messing with the buffer board on a LG tv with stutter problems ... He seemed to fix it by bypassing some IC.. Cant find the video of it right now but when i do i will post it so you can try.

[anupkg1985]

Re: THOMSON / TCL 43UC6406 jumping image

I fixed same issue with VIZIO TV by putting small piece of tape on the cable connecting to LCD panel from t-con. I don't remember exactly but I placed tape on 3-4 pins and it worked.

[nomoresonys]

Re: THOMSON / TCL 43UC6406 jumping image

I fixed same issue with VIZIO TV by putting small piece of tape on the cable connecting to LCD panel from t-con. I don't remember exactly but I placed tape on 3-4 pins and it worked.

+1, Yep, tape-cutoff method, might just work.

[worlor]

Re: THOMSON / TCL 43UC6406 jumping image

Hello,
Tried to tape pin 3-4 of the ribbon cable, green lines have appeared but the "wobbling" is still present :/

[anupkg1985]

Re: THOMSON / TCL 43UC6406 jumping image

I'm not sure about the pin numbers and it could be different for TCL than Vizio. First you need to identify which side is the problem left or right bu disconnecting one cable cable at a time from t-con and check half image has that "wobbling" issue or not. Then you need to take brute force action to fixe the issue. As I said there is no specific number of pin that you need to block.

[Diah]

Re: THOMSON / TCL 43UC6406 jumping image

Hello,
Tried to tape pin 3-4 of the ribbon cable, green lines have appeared but the "wobbling" is still present :/

try the method on 1 or 2 or 3 or 4 pins on the side in photo