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

[gbbradshaw]

Hi.
I have the Samsung TV Model: UE65TU7000KXXU VER:02/UTU7000 which has developed the following issue: blue screen while the sound it's still working. This happened after the screen developed some horizontal lines at first and then the next day suddenly turned into blue background. the screen was not damaged or anything. I can't access the menu. I have taken the tv to a local tech to have a look and he said that he thinks that it might be the pcb board as the back-lights are working and the sound aswell . I was hoping maybe you can guide me if I should buy the pcb board or not? Thanks

[gbbradshaw]

Samsung UE65TU7000KXXU VER:02/UTU7000 tv pcb board cap

Hi all,
The problem on my Samsung TV Model: UE65TU7000KXXU VER:02/UTU7000 is more likely to be a bad capacitor (smd?) On the pcb board. The local tech has recommended to buy a second hand pcb but he isn't sure if this will eventually sort the issue. I have a blue screen with sound working.
Is there any way I can check the capacitors myself before taking the risk and buying the pcb that might not work?
There is a picture of the board. Thanks alot!

[Storyteller12]

Re: Samsung 65" TV Blue screen

Can’t say 100% without and kind of troubleshooting. But these “TU” series TVs have had a lot of panel failures/ problems.

[gbbradshaw]

Re: Samsung tv pcb board cap

I have tested with the multimeter for continuity (beep) and also tested by setting it on 20k ohms and some of them are charging while some are not showing any value.

[gbbradshaw]

Re: Samsung 65" TV Blue screen

Can’t say 100% without and kind of troubleshooting. But these “TU” series TVs have had a lot of panel failures/ problems.

My theory is that while he was checking the tv, the tech has "played" with the ribbon cables that connects the bottom lvds stripe and that's why the next morning he announced me that the screen is blue. I've only found out later that these can cause problems by not connecting them back properly, so there's too late to complain about it now.

[nomoresonys]

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

post straight on clear pictures of each board and one of the whole back, as to see how everything is connected.

[gbbradshaw]

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

post straight on clear pictures of each board and one of the whole back, as to see how everything is connected.

I will certainly do that once I get home, thank you!

One thing, it appears that the pcb has a heating shield on it which has thermal paste on. The reason why I am mentioning this is because there are more capacitors under the heating shield but I am not sure if I should take that apart.

[nomoresonys]

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

should probably do some voltage checking before removing anything.

[yokoono]

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

Is CN1 closed correctly?

[nomoresonys]

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

easy stuff first, try a simple reset, with tv unplugged, hold power button on tv for 30 seconds, then plug it in and try it.

[nomoresonys]

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

yep, make sure those cables are positioned correctly, can clean them too: https://www.youtube.com/watch?v=aOCLpJub2l0

[gbbradshaw]

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

should probably do some voltage checking before removing anything.

I will do clear pictures and then maybe you can guide me to do so please.

[gbbradshaw]

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

yep, make sure those cables are positioned correctly, can clean them too: https://www.youtube.com/watch?v=aOCLpJub2l0

I have already did that last night just to tick this off the to do list. No success with that. One thing I have to mention, removing the white lvds cable , the long one, does nothing. But with it connected, when I switch through the tv channels I can see the screen light changing from dark blue to lighter. Which mean somehow thr pcb board is not sending enough signal to the display.

[gbbradshaw]

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

easy stuff first, try a simple reset, with tv unplugged, hold power button on tv for 30 seconds, then plug it in and try it.

Already tried that, more than 60 seconds.

[gbbradshaw]

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

Is CN1 closed correctly?

Yes , everything was cleaned with contact cleaner and put back together as normal to the lines.

[Davi.p]

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

don't waste money buying a main board, it's almost surely the panel, since you are not a tech and the fault is very difficult i suggest you to sell the whole thing as a defective unit.. bye..

[gbbradshaw]

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

don't waste money buying a main board, it's almost surely the panel, since you are not a tech and the fault is very difficult i suggest you to sell the whole thing as a defective unit.. bye..

I am not sure I want to sell it for £50 while I paid more than 10 times this price last year. I am sure there are specialists in here who might have encountered this kind of problem over the years and that might be able to help. Thanks for replying though.

[gbbradshaw]

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

But OUT d pee, if you don't want to help, keep your SARCASM to yourself.

Thanks dude! Just stay tuned, I will upload the pictures at around 6pm uk time.

[nomoresonys]

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

you could check the little mlc caps on the panel driver boards for shorts or very low ohms.

[gbbradshaw]

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

you could check the little mlc caps on the panel driver boards for shorts or very low ohms.

Is this the right way to do it? Please check the picture
I know that if the caps beeps when I use the multimeter, in most occasions its a bad capacitor.
I also know that if I set the multimeter to 20k to check the ohms and the value is not going from 0 to higher, that's also a bad cap.
Correct / guide me if I am wrong please. Thanks