samsung UE49MU6120KXXU image problem

[ioanban]

Hi guys,
I have a samsung UE49MU6120KXXU with a flickering problem and some lines on the screen.

I have looked around the forum but i didn't manage to find a solution to my problem.

I've already tried to clean the cable strips but nothing changed.
I've atached some pictures with all the boards and a video with the problem for you to get a better idea.

https://youtube.com/shorts/QNxt4RIdJ0g?feature=share

Regards,

[ioanban]

https://www.youtube.com/watch?v=AOnFCJCTACk

[Davi.p]

defective panel, try disconnecting one flat cable to the screen at a time and watch results..

[ioanban]

Originally Posted by Davi.p

defective panel, try disconnecting one flat cable to the screen at a time and watch results..

I have removed the flat cables one at the time but I'm not getting any image , all screen goes black .

[Davi.p]

in this case i have no answer for now, must take pictures of the panel's boards searching for silkscreens of signals, if you find some clk-something, must cut them one by one, one side at a time..

[ioanban]

Originally Posted by Davi.p

in this case i have no answer for now, must take pictures of the panel's boards searching for silkscreens of signals, if you find some clk-something, must cut them one by one, one side at a time..

Davi, i have uploaded pictures with all the boards in the first post .

[Davi.p]

panel's boards are under a metal frame under speakers...

[ioanban]

I have already tried to fiddle with the strips from the panels but i haven't noticed any changes on the screen .

You have some pictures with the panel boards, i have don them in sections so that you can see them better, attached here .

[Davi.p]

Badcaps-1.jpg
must cut one by one tracks with signal name with CK... and see if defect goes..

[ioanban]

Originally Posted by Davi.p

Attachment 243372
must cut one by one tracks with signal name with CK... and see if defect goes..

Good morning Davi,
Could you tell me how am I supposed to do that ? a video would be helpful or some description.

Thank you

[Davi.p]

it's not easy, on the top image i've marked the tracks to be cut, must make cuts of the near track translated not in line, so it's more easy when you join them again, the round pads covered in green have corrispondance with signals labeled in the bottom picture, cut only the ones with CK.., cut until defect goes away , if it doesn't join them all and cut the ones in the other side...

[bohaboha]

Originally Posted by Davi.p

it's not easy, on the top image i've marked the tracks to be cut, must make cuts of the near track translated not in line, so it's more easy when you join them again, the round pads covered in green have corrispondance with signals labeled in the bottom picture, cut only the ones with CK.., cut until defect goes away , if it doesn't join them all and cut the ones in the other side...

Good Evening Davi.p I have read your answer and tried to figure out how to go about implementing your advice but could not. can you please describe a little more in detail how to proceed.thank you

[Davi.p]

Who are you? Not Ioanban?
It's not easy with my english...
In the bottom image you see the silkscreens of the signals that passes in the traces i have marked approximately in the top image, the signals labels refers to the green round pads(testpoints), counting the corrispondant pads you'll cut the traces one by one..

[bohaboha]

hi again Davi.p no I am not Ioanban and my English is worse than yours. I have a samsung tv problem and am trying to find a solution to the one it is posted here : Samsung UE55KU6575U SHOWS ONLY HALF SCREEN if you can help me I will be very happy

[Davi.p]

Bohsboha it's generally not good to hijack an other one's thread, post your own thread, your defect is different..

[ioanban]

Originally Posted by Davi.p

it's not easy, on the top image i've marked the tracks to be cut, must make cuts of the near track translated not in line, so it's more easy when you join them again, the round pads covered in green have corrispondance with signals labeled in the bottom picture, cut only the ones with CK.., cut until defect goes away , if it doesn't join them all and cut the ones in the other side...

Don't worry about your english, it's perfect !
My problem is that i don't know how to physically cut those tracks, i've never done it or seen anyone doing it before.

Thank you for the help Davi

[Davi.p]

Yes, in the truth i've never done this particular modify and i feel it's very difficult, must use a cutter with very sharp blade and putting it at least 45 degrees or more to the surface and slowly cut paying attention to not to cut adiacent trace.. maybe with help of magnifier..

[mmartell]

Easier to try and cover some of the pins on the flex cable with a small piece of tape than to cut a tiny trace. Plus it's reversible by removing the tape.

As per earlier instruction you need to at least narrow which side you should be working in.

[Davi.p]

yes i'm very sorry, i made big mistake, tape method should work..

[ioanban]

Originally Posted by mmartell

Easier to try and cover some of the pins on the flex cable with a small piece of tape than to cut a tiny trace. Plus it's reversible by removing the tape.

As per earlier instruction you need to at least narrow which side you should be working in.

What flex cable are you referring to because it doesn't have a tcom board