no picture on my samsung 50 inch plasma

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • jose6326
    Badcaps Veteran
    • May 2013
    • 707
    • USA

    #21
    Re: no picture on my samsung 50 inch plasma

    When I get home from work I will take a picture of the jumpered 4pin connector and the disconnected cable

    Comment

    • jose6326
      Badcaps Veteran
      • May 2013
      • 707
      • USA

      #22
      Re: no picture on my samsung 50 inch plasma

      Here are the pics

      I jumpered number 3 and 4 on the 4pin connector and disconnected the cable from the main board
      Attached Files

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #23
        Re: no picture on my samsung 50 inch plasma

        Well, I can't see anything wrong there. I'd consider a control board fault in this instance then.
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • jose6326
          Badcaps Veteran
          • May 2013
          • 707
          • USA

          #24
          Re: no picture on my samsung 50 inch plasma

          Ok I guess I will order a board

          Comment

          • jose6326
            Badcaps Veteran
            • May 2013
            • 707
            • USA

            #25
            Re: no picture on my samsung 50 inch plasma

            Ok I got another logic board and I installed it

            It did not fix the problem
            Still a black screen

            I jumpered number 3 and 4 on the 4pin connector and disconnected the cable from the main board

            And again I did NOT get any test pattern

            Im going to order the xmain board since the voltage is not correct

            I already bought every other board so buying this board at this point wont matter

            All is left is the main board

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #26
              Re: no picture on my samsung 50 inch plasma

              No test pattern available with lit up screen is a fault I have only encountered when the Va voltage or data connections to the panel are missing or the panel is completely dead. But there are 15 drive packs on a 1080p panel like yours and for all of them to fail would be very unlikely.

              I would be surprised if it is the X-main board, unless the control board is sensing a fault and disabling the video output but leaving the Y-main alive, which would be a strange design.
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

              Comment

              • jose6326
                Badcaps Veteran
                • May 2013
                • 707
                • USA

                #27
                Re: no picture on my samsung 50 inch plasma

                So what else do you think it might be?

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #28
                  Re: no picture on my samsung 50 inch plasma

                  As I said I have not encountered this fault before and can't be sure. There is always a chance your replacement control board has the same fault. I've had an average 25% bad board rate from eBay.
                  Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                  For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                  Comment

                  • jose6326
                    Badcaps Veteran
                    • May 2013
                    • 707
                    • USA

                    #29
                    Re: no picture on my samsung 50 inch plasma

                    This sucks
                    I wish I could borrow a known working logic board just to rule out this problem

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #30
                      Re: no picture on my samsung 50 inch plasma

                      The only thing that can diagnose this is an oscilloscope, any chance you have one or can beg/borrow/steal one?
                      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                      Comment

                      • jose6326
                        Badcaps Veteran
                        • May 2013
                        • 707
                        • USA

                        #31
                        Re: no picture on my samsung 50 inch plasma

                        There is one at my job I may be able to borrow

                        But I dont remember how to use it

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK

                          #32
                          Re: no picture on my samsung 50 inch plasma

                          I will be able to help you set it up if you can provide detailed pictures and follow instructions to the letter.
                          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                          Comment

                          • jose6326
                            Badcaps Veteran
                            • May 2013
                            • 707
                            • USA

                            #33
                            Re: no picture on my samsung 50 inch plasma

                            Sounds good

                            Comment

                            • jose6326
                              Badcaps Veteran
                              • May 2013
                              • 707
                              • USA

                              #34
                              Re: no picture on my samsung 50 inch plasma

                              Here is the pic of the o scope
                              The "electronics guy" says it can only measure as high as 5v times 8 divisions and

                              5v peak to peak

                              Hope this makes sense
                              Attached Files

                              Comment

                              • tom66
                                EVs Rule
                                • Apr 2011
                                • 32560
                                • UK

                                #35
                                Re: no picture on my samsung 50 inch plasma

                                That scope will be fine, did you get an actual scope probe with it (with a tip and ground lead) and does your probe have a 1X/10X setting?
                                Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                Comment

                                • jose6326
                                  Badcaps Veteran
                                  • May 2013
                                  • 707
                                  • USA

                                  #36
                                  Re: no picture on my samsung 50 inch plasma

                                  Yes probe has 1x 10x settings

                                  Comment

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK

                                    #37
                                    Re: no picture on my samsung 50 inch plasma

                                    On this board:
                                    https://www.badcaps.net/forum/attach...1&d=1369514611

                                    ...do you think you could take a picture from the left hand side so I can see partly under the heatsink?
                                    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                                    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                                    Comment

                                    • jose6326
                                      Badcaps Veteran
                                      • May 2013
                                      • 707
                                      • USA

                                      #38
                                      Re: no picture on my samsung 50 inch plasma

                                      I will take a pic tonite

                                      I have the o scope till Wednesday

                                      Hopefully i have internet connection to post

                                      Comment

                                      • jose6326
                                        Badcaps Veteran
                                        • May 2013
                                        • 707
                                        • USA

                                        #39
                                        Re: no picture on my samsung 50 inch plasma

                                        Here is a pic of the probes
                                        Attached Files

                                        Comment

                                        • jose6326
                                          Badcaps Veteran
                                          • May 2013
                                          • 707
                                          • USA

                                          #40
                                          Re: no picture on my samsung 50 inch plasma

                                          Here is the pic if the left side of the y main
                                          Attached Files

                                          Comment

                                          Related Topics

                                          Collapse

                                          • Tynan Dill
                                            Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                                            by Tynan Dill
                                            I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                                            Upon bringing it home and plugging it up, it showed a standby light.

                                            I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                                            The screen seems to blackout and stay black, but with a flashlight I can see the display.

                                            With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                                            Assuming...
                                            11-22-2024, 01:46 PM
                                          • m1ch43lzm
                                            HP Pavilion 15-eh Board DAG7HAMB8F0 - CPU throttling to 0.4GHz (PROCHOT_EXT) and black screen
                                            by m1ch43lzm
                                            Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
                                            Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
                                            05-12-2025, 08:37 PM
                                          • ohren
                                            Upgrading a Samsung ue55nu7096u with logic board from an ue55ru7105k -- good idea?
                                            by ohren
                                            I hope this is the right forum to post in despite not technically being a repair, but still a question of swapping boards.

                                            I thought I'd explore the possibility to upgrade an existing working Samsung ue55nu7096u with the logic board (and power board if needed) of a newer model (ue55ru7105k) of the same size and appearance (and resolution). The reason being I'd like the extra inputs of that board including component in, an extra HDMI port and bluetooth. Its panel is broken so I have no use for the board otherwise.

                                            The models launched in 2018 and 2019 respectively....
                                            09-08-2023, 05:24 PM
                                          • C152Heavy
                                            Samsung LN46C630K1F – Intermittent Backlight, BN44-00341B Power Board
                                            by C152Heavy
                                            Samsung LN46C630K1F – Intermittent Backlight, BN44-00341B Power Board

                                            Summary for TL-DR readers:
                                            • Backlight is intermittent, may come on with TV boot or not. No flickering, never fails during TV on.
                                            • Have obtained Samsung schematic & service documents - Can upload if helpful.
                                            • Have read ALL applicable threads
                                            • C1818 and CP820 replaced as low hanging fruit
                                            • CN802 data taken for normal and failed BL operation. SUMMARY: Pin 2 - 5vDet = 3.52 @normal, 0.0 @BL fail. Pin 6 - EPWM = 1.631 @normal, 1.058 @BL fail.
                                            • VCC pin (18) of PFC...
                                            01-11-2023, 02:53 PM
                                          • ermals
                                            Samsung UN55H8000AF - No Picture, Working Backlight, Replaced T-Con Board
                                            by ermals
                                            Hi all!
                                            I've recently run into an issue with my Samsung UN55H8000AF LED TV displaying no image. I've done quite a bit of research in terms of what could be wrong with it. Below are the steps I've taken prior to reaching out here for some assistance:

                                            1. I've tried replacing the T-Con board (BN95-01594A), twice and have still experienced the same issue with all the boards I've tested with.
                                            2. I've tried to remove one side of the ribbon cable that goes from the T-Con board to the panel and still not getting any image on left or right side.
                                            3. I've checked voltages...
                                            08-01-2022, 10:35 AM
                                          • Loading...
                                          • No more items.
                                          Working...