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

[Donny2derby]

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

masking Panel CKV never being solution.. the side effect range are huge.

With this in mind Diah, what's the proper solution to blocking these lines so that other issues don't crop up.

[Davi.p]

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

build a simple tester, YouTube is full of projects, power resistor and a diode britdge, 2 components, if led are bad replace led bars

[gbbradshaw]

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

No... i think defenitely no.. this set has been hit by a overvoltage, those can destroy many parts of a tv at same time, already seen so many times.. plus some effects of o.v. damage can show with delay..

There was an overvoltage in my area couple of weeks ago, but didn't notice anything damaged in thr house.
OK, so what's to be done? First check for burnt led

[Davi.p]

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

No... i think defenitely no.. this set has been hit by a overvoltage, those can destroy many parts of a tv at same time, already seen so many times.. plus some effects of o.v. damage can show with delay..

[gbbradshaw]

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

masking Panel CKV never being solution.. the side effect range are huge.

You might be right, but i don't really think this is what caused the problem. The problem was that the screen was set on full brightness all the time and this made the led fail (probably burnt led).haven't got the suction cups to remove the screen and check

[Diah]

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

masking Panel CKV never being solution.. the side effect range are huge.

[gbbradshaw]

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

Did you unplug the cable between main<->PSU and plug in AC cord? This will light up the backlights if its working (screen will be dark due to LCD off but will see backlight shining through the holes in the middle chassis.

Is the flickering like a brightness strobing effect? I have this on a US version of 65TU7000 but not dimmed picture. My issue was a noisy VCST

https://www.badcaps.net/forum/showpo...08&postcount=6

hi,
yes i did. nothing changed, and yes, like a brightness strobing effect. sometimes looks brighter . if you look down the holes in the chassis you can see the light "strobing"

[howardc64]

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

Did you unplug the cable between main<->PSU and plug in AC cord? This will light up the backlights if its working (screen will be dark due to LCD off but will see backlight shining through the holes in the middle chassis.

Is the flickering like a brightness strobing effect? I have this on a US version of 65TU7000 but not dimmed picture. My issue was a noisy VCST

https://www.badcaps.net/forum/showpo...08&postcount=6

[Davi.p]

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

bad leds..

[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

[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

Here are the informative pictures.

[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 !

[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

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

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.

[lotas]

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

Yes

[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

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

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?