Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

[gbbradshaw]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

are you heavy weight person lol..... the place were u worked before on u ribbon... i can see there are signs

if you were slim which i don't think so... then sorry ignore what i wrote. lol

Hahaha, no I am not fat person, just a normal guy that used to do alot of sports. Not slim, not fat.
Talking about the u ribbon , i don't see any signs as I have not worked on them, maybe just some fingertips

[Davi.p]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

I am afraid I have only removed the u ribbon from right side as I ran out of time to do so for the left side aswell

I will try this tomorrow. So patch 8, then another 8, only from on side of the u ribbon, until it gets fixed? Please look at picture.

no you' ve not understood, the faulty part of the screen is the right part, so you have to put tape only on right half and not so, you start from far of side and shift 1 pin per time only not 8.. but only 8 pins covered..

[gbbradshaw]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

no you' ve not understood, the faulty part of the screen is the right part, so you have to put tape only on right half and not so, you start from far of side and shift 1 pin per time only not 8.. but only 8 pins covered..

Ok, I will try. But can you have a look at this video and maybe explain why he has covered like 15 pins at once please?

https://youtu.be/XCJAx92JwPs

[Davi.p]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Some lines can have no influence, the lines to be blocked are the clock lines usually are 8 but can be less, check on the screen's small boards if there are test points named CKVxxx you can also discover to which pins are connected by using multimeter..

[gbbradshaw]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Some lines can have no influence, the lines to be blocked are the clock lines usually are 8 but can be less, check on the screen's small boards if there are test points named CKVxxx you can also discover to which pins are connected by using multimeter..

And how can I find them? I mean, there are no markings on the small boards, just the capacitor numbers C- etc

[Davi.p]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

if no markings ---> dog penis method (random)

[gbbradshaw]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

if no markings ---> dog penis method (random)

How do I know which side of thr u ribbon?

[gbbradshaw]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Some lines can have no influence, the lines to be blocked are the clock lines usually are 8 but can be less, check on the screen's small boards if there are test points named CKVxxx you can also discover to which pins are connected by using multimeter..

Dude ! I have found the test points, called TESTa12 TESTb12 . How can I test them? Can you please guide me ? Thanks

LE: unfortunately these are not called CKVxx

[lotas]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Ckv1,2,3,....

[gbbradshaw]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Ckv1,2,3,....

Great! How should I set my multimeter to?
Please can you draw on this picture? I am no professional but I do know how to follow instructions

Beep or 20k resistance?

[lotas]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Disconnect the U-tubing and measure the resistance at these points (CKV) against ground (on the bar itself).
You can also put it on 2K and where the resistance will be underestimated, that CKV is not working.

[gbbradshaw]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Disconnect the U-tubing and measure the resistance at these points (CKV) against ground (on the bar itself).

Shouldn't I change the cable to here?

[lotas]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Yes

[Diah]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

after going back to yours Photo

it look for me half buffer issue which it caused by didn't match firmware with Panel. there are SPI on the panel it keep "safe" parameter from yours old MB firmware..would be written back to match by Hard reset from MB or update / downgrade firmware on yours replacement MB.

[gbbradshaw]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

after going back to yours Photo

it look for me half buffer issue which it caused by didn't match firmware with Panel. there are SPI on the panel it keep "safe" parameter from yours old MB firmware..would be written back to match by Hard reset from MB or update / downgrade firmware on yours replacement MB.

And how do I do that hard reset?
Edit: I have reset the tv, now trying to update software as the reset did not help.

[Diah]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

hard reset shoulkd done via service menu... post #38

[gbbradshaw]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Problem solved ! The tv has finally been repaired.
Solutions:
1: changed the main board , this way I went from having a permanent blue screen with sound to having image + sound but lines on screen.
2. Checked every single one of the capacitors and resistors on the bottom boards, no luck.
3. Covered the first 8 pins of the first part from the left side of the u ribbon, one by one until the total of 8 pins, no luck, i even went up to 15 pins, no change.
4. The fourth and the final step, the solution itself, was the decision of trying to cover the pins from right part of the u ribbon, which are located on the same socket, but on the right side. I started with covering one pin and when I got to cover the 7th pin, the image was 90% clear. Just a few lines on the top but barely noticeable. Because I wasn't happy enough, I have decided to go more, one by one ,until the 15th pin where the image was perfect.
I have covered the pins with normal transparent tape, as the black insulation tape was too thick and I couldn't stick the u ribbon back in. Hopefully, this tape will last at the board temperature . Fingers crossed.
Thanks to all for your help. I have gained so much information over here. I couldn't have done it without you guys. Really appreciate it !

[gbbradshaw]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Here are the informative pictures.

[Storyteller12]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Nice work being persistent paid off. Good job

[gbbradshaw]

Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

Hi everyone.
I had to reopen this thread as now I've encountered another problem with the tv.
Basically the tv works but the brightness Is at its lowest possible and the screen flickers. I can see the image in the dark room but only then. I have tried to lower the brightness and also turned the automatic brightness off.
The things I've tested are:
-plugged of the pcb and start the tv, but still same issue
-started the tv without the led connected plugged in, same
-tested the power that comes out from the power board to the led connector. I am getting 286v on the first pin 1+ and just that, the rest shows 0 voltage. With or without the led connector in.
Is this likely to be the power board needs replacing?
Please see the image attached with the power board.
Thanks