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

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  • Davi.p
    Hobbist Tech
    • Sep 2009
    • 4341
    • Italy - Milan
    #101
    Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

    bad leds..

      Comment

      • howardc64
        Badcaps Veteran
        • Jun 2017
        • 626
        • United States
        #102
        Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

        Originally posted by gbbradshaw
        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

          Comment

          • gbbradshaw
            Senior Member
            • Feb 2023
            • 55
            • United Kingdom
            #103
            Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

            Originally posted by howardc64
            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"

              Comment

              • Diah
                Badcaps Legend
                • Feb 2013
                • 6376
                • Germany
                #104
                Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

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

                  Comment

                  • gbbradshaw
                    Senior Member
                    • Feb 2023
                    • 55
                    • United Kingdom
                    #105
                    Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

                    Originally posted by Diah
                    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

                      Comment

                      • Davi.p
                        Hobbist Tech
                        • Sep 2009
                        • 4341
                        • Italy - Milan
                        #106
                        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..

                          Comment

                          • gbbradshaw
                            Senior Member
                            • Feb 2023
                            • 55
                            • United Kingdom
                            #107
                            Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

                            Originally posted by Davi.p
                            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

                              Comment

                              • Davi.p
                                Hobbist Tech
                                • Sep 2009
                                • 4341
                                • Italy - Milan
                                #108
                                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
                                Last edited by Davi.p; 05-14-2023, 05:04 AM.

                                  Comment

                                  • Donny2derby
                                    Badcaps Veteran
                                    • Apr 2023
                                    • 228
                                    • Uk
                                    #109
                                    Re: Samsung 65" UE65TU7000KXXU VER:02/UTU7000 TV Blue screen

                                    Originally posted by Diah
                                    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.

                                      Comment

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