UA32C6900 continuous restaring

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • saddle_au
    Waste Warrior
    • Jan 2013
    • 121
    • Australia

    #1

    UA32C6900 continuous restaring

    Hi everyone.

    I have a Samsung UA32C6900 with a BN44-00355B power supply and BN94-03562J main board. The tv powers up, runs it's jingle through the speakers then turns the back lights on with an image on the screen (faulty colours but that's probably another issue). After a further 2 seconds the unit shuts off and then goes through the same cycle as if powered up again.

    I've measured the 5 volts and 12 volts from the P/S and they seem ok. It just gives up the ghost after two seconds of running the led back lights.

    Some web hunt about this problem has come up with similar stories that make me think either the eeprom on the main board may be corrupt or the power supply may have an issue. It's just two seconds is an awfully long time if feeding into a fault before deciding to give up, so I am going to try and discount it by disconnecting the main board and jumper the supply to on.

    I was just wondering before jumping right in if anyone has seen this type of sequence before with a UA or UE 32C series Samsung and what it might be.

    Thanks.
    Attached Files
  • tiny68
    Member
    • Aug 2013
    • 33
    • Australia

    #2
    Re: UA32C6900 continuous restaring

    Did you have any luck with this one? I've just picked up one with what appears to be very similar symptoms. I haven't opened it up yet.

    A.

    Comment

    • Jivs
      New Member
      • Oct 2017
      • 1
      • India

      #3
      Re: UA32C6900 continuous restaring

      Hi everyone please I need of schematic diagram of BN94-03562J Samsung main board.

      Please help me

      Comment

      • petehall347
        Badcaps Legend
        • Jan 2015
        • 4427
        • United Kingdom

        #4
        Re: UA32C6900 continuous restaring

        just had same thing . was a cap under the metal shield on the main board . found it with heating and cooling .

        Comment

        • tiny68
          Member
          • Aug 2013
          • 33
          • Australia

          #5
          Re: UA32C6900 continuous restaring

          No metal shield on my main board other than the TV tuner can - I assume this is not what you are (were) talking about?
          Attached Files

          Comment

          • dick_barton
            Badcaps Legend
            • Aug 2015
            • 6643
            • Wales

            #6
            Re: UA32C6900 continuous restaring

            Could you try to find the fault just as Petehall347 did with heating and cooling areas of the board.
            Willing to help but I'm no expert.

            Comment

            • tiny68
              Member
              • Aug 2013
              • 33
              • Australia

              #7
              Re: UA32C6900 continuous restaring

              I can do the heating bit, but not sure about the cooling. any suggestions?

              Comment

              • petehall347
                Badcaps Legend
                • Jan 2015
                • 4427
                • United Kingdom

                #8
                Re: UA32C6900 continuous restaring

                was a metal shield with holes in if i remember rightly . try warming areas up anyway .

                Comment

                • dick_barton
                  Badcaps Legend
                  • Aug 2015
                  • 6643
                  • Wales

                  #9
                  Re: UA32C6900 continuous restaring

                  For cooling you can use a can of freezer spray or turn a can of compressed air (for dusting keyboards) upside down and spray.
                  Willing to help but I'm no expert.

                  Comment

                  • diif
                    Badcaps Legend
                    • Feb 2014
                    • 6978
                    • England

                    #10
                    Re: UA32C6900 continuous restaring

                    I use lighter gas/butane for freezing. It's cheap, readily available and is the propellant they use in the cheap cans of air anyway.

                    Comment

                    • petehall347
                      Badcaps Legend
                      • Jan 2015
                      • 4427
                      • United Kingdom

                      #11
                      Re: UA32C6900 continuous restaring

                      Originally posted by diif
                      I use lighter gas/butane for freezing. It's cheap, readily available and is the propellant they use in the cheap cans of air anyway.
                      be careful with that .it has a habit of hanging around on the floor ready for a spark

                      Comment

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #12
                        Re: UA32C6900 continuous restaring

                        Originally posted by tiny68
                        No metal shield on my main board other than the TV tuner can - I assume this is not what you are (were) talking about?
                        So are you having the same issue as the OP?
                        Never stop learning
                        Basic LCD TV and Monitor troubleshooting guides.
                        http://www.badcaps.net/forum/showthr...956#post305956

                        Voltage Regulator (LDO) testing:
                        http://www.badcaps.net/forum/showthr...999#post300999

                        Inverter testing using old CFL:
                        http://www.badcaps.net/forum/showthr...er+testing+cfl

                        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                        http://s807.photobucket.com/user/budm/library/

                        TV Factory reset codes listing:
                        http://www.badcaps.net/forum/showthread.php?t=24809

                        Comment

                        • Davi.p
                          Hobbist Tech
                          • Sep 2009
                          • 4360
                          • Italy - Milan

                          #13
                          Re: UA32C6900 continuous restaring

                          Theese recent boards has no shields on them, Petehall is having mistake i guess. The problem is much probably software and has no other solution than MB change, anyway there's a little chance that that BGA chip that has lines that feed the LVDS cable (FRC chip) has soldering problems. Another little chance of any other thing connected to this chip like ram or V reg. is half short circ.

                          Comment

                          • tiny68
                            Member
                            • Aug 2013
                            • 33
                            • Australia

                            #14
                            Re: UA32C6900 continuous restaring

                            Budm - yes sounds very similar to OP, with constant reboots and the voltages seeming ok, although I can't be certain that the image issues I see are the same as OP. I will try to upload a photo later in the week (I've put it aside to work on a different TV for the moment.
                            Davi.p - you could be right about needing a board replacement, but I don't like to give up without a bit of a fight!
                            I'll get the heat gun out and also find some freeze air to see if I can induce any change in behaviour.

                            Comment

                            • Davi.p
                              Hobbist Tech
                              • Sep 2009
                              • 4360
                              • Italy - Milan

                              #15
                              Re: UA32C6900 continuous restaring

                              Which image shows? Is it the Logo and stop? This almost always is software conflict. Is it yours? Which is the story? it was connected to the net before the fault? Have you a new if settings has been reset? This can explain why colors are not ok..

                              Comment

                              • tiny68
                                Member
                                • Aug 2013
                                • 33
                                • Australia

                                #16
                                Re: UA32C6900 continuous restaring

                                Ive attached a still image from the restarting TV. This is what I see after the start up chine and before it reboots. I haven't taken the back off again yet, but will do so to try applying some heat and cooling of the main board.
                                Attached Files

                                Comment

                                • tiny68
                                  Member
                                  • Aug 2013
                                  • 33
                                  • Australia

                                  #17
                                  Re: UA32C6900 continuous restaring

                                  I've just tried the heat gun pointed at the bottom of the mainboard and initially I had just the vertical lines shown on the previous image I attached (with regular reboots still) but then the image no longer came up at all and there is no chime between the reboots (relay clicks every 7secs). I tried to let it cool down a bit and tried a little bit of butane (carefully) to try to cool the area but it remains in the 7sec boot state, without any image or chime.
                                  Ill try it again after it fully cools down.

                                  Any further thoughts?

                                  Comment

                                  • Davi.p
                                    Hobbist Tech
                                    • Sep 2009
                                    • 4360
                                    • Italy - Milan

                                    #18
                                    Re: UA32C6900 continuous restaring

                                    The fault was not explained well since the first post through 17 posts, next time try to post a picture earlier, it is not funny to do investigation on the nothing, now i see that something can be.wrong on tcon.board, try to hook that one to an external 12v p.supply and see if if goes into protection.
                                    Last edited by Davi.p; 08-01-2020, 06:24 AM. Reason: boh!

                                    Comment

                                    • tiny68
                                      Member
                                      • Aug 2013
                                      • 33
                                      • Australia

                                      #19
                                      Re: UA32C6900 continuous restaring

                                      Davi.p I don't understand. Are you saying I should try to connect an external 12VDC supply to the TCON while it is connected to everything else in the TV (VLDS and panel ribbon cables) or are you talking about doing the test of the TCON board on the bench alone? This is not a test I have done/seen before.
                                      The symptoms I explained in post #16 changed after I applied some heat to the bottom area of the main board(refer to post#17), not the TCON, and have not returned even after being turned off for the past 2 hours. There is no image on the display at all anymore, and no chime, but the TV is still rebooting every 7 seconds or so.

                                      Comment

                                      • Davi.p
                                        Hobbist Tech
                                        • Sep 2009
                                        • 4360
                                        • Italy - Milan

                                        #20
                                        Re: UA32C6900 continuous restaring

                                        sorry, i forgot to say the tcon only connected to test psu, ok i saw you changed the board behaviour but you can be more precise, what you have warmed up, the processor? how much? until a level of reflowing? have you ever done refllows? it's easy to make some poor reflows that belongs to a not booting board, so i was suggesting to inspect for an original fault, if it's tcon then evaluate the global damage if you cant do reballings
                                        Last edited by Davi.p; 08-01-2020, 12:33 PM. Reason: boh

                                        Comment

                                        Related Topics

                                        Collapse

                                        • Document Archive
                                          Samsung Galaxy Book 2 Notebook Specification for Upgrade or Repair
                                          by Document Archive
                                          This specification for the Samsung Galaxy Book 2 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Galaxy Book 2 boardview and Galaxy Book 2 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
                                          09-07-2024, 05:50 AM
                                        • Asraf Atb
                                          Help Needed: Samsung UE55MU8000 Dead - Possible Main Board Issue
                                          by Asraf Atb
                                          Hi everyone,

                                          Im looking for some advice regarding my Samsung UE55MU8000 TV with main board model BN94-11606C. The TV suddenly stopped turning on and now shows no signs of life at all not even the standby light at the bottom.

                                          Initially, I suspected an issue with the PSU, so I took it to a repair center. They tested it and confirmed that the PSU works perfectly, even on other TVs. Based on that, I started investigating the main board.

                                          I disconnected the main board from the PSU, and the backlight turned on, which seems to confirm the main board is the issue....
                                          01-27-2025, 05:02 PM
                                        • JSin21
                                          Compatibility of main boards between different variations of samsung MU6100
                                          by JSin21
                                          Hoping someone here could possibly help. I have a few questions in regards to compatibility with main boards. But I'll give a quick short run down on what's going on first;

                                          I have Samsung Smart TV UA65MU6100WXXY version DA01

                                          Now years ago it started intermittently playing up after a lighting strike. Lighting hit the block of units i was living in at the time. Ever since that night the TV started having a mind of its own, It would randomly turn itself off or on, and all inputs stopped responding like HDMI, aerial, but USB still worked. Anyway, over the next few months...
                                          11-27-2023, 04:54 AM
                                        • Yanleb
                                          Compatibility of Samsung Y Main boards LJ92-01732A no rev vs rev AA2
                                          by Yanleb
                                          Hi, I did look everywhere to know if Samsung Y Main boards LJ92-01732A without rev marking is compatible with LJ92-01732A rev AA2.

                                          If they are not compatible why did Samsung give them the same part number to begin with?
                                          08-04-2025, 11:35 PM
                                        • elpatxi_bcn
                                          Samsung HG75EJ690UB Hotel TV, change main?
                                          by elpatxi_bcn
                                          Hello!

                                          I just got a Samsung TV model HG75EJ690UB 75" and 4K. It is a hotel TV, with a slightly different version of the Tizen operating system than the TVs at home.
                                          Being a hotel, it is covered in many functions. With the service menu I can unlock some, but not others. For example, I can't install apps like Netflix etc...
                                          The fact is that it seems that I can replace the main by a, say, "normal". I think the one that corresponds is NU7105, ref BN94-02635. At work, which is a convention center and a hotel, I have many TVs from 55" to 85" that...
                                          05-19-2023, 03:21 AM
                                        • Loading...
                                        • No more items.
                                        Working...