Proscan LED 32" TV not working.

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  • vinceroger69
    Badcaps Legend
    • Mar 2012
    • 6714
    • uk

    #21
    Re: Proscan LED 32" TV not working.

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

    Comment

    • THERED117
      Member
      • May 2017
      • 25
      • USA

      #22
      Re: Proscan LED 32" TV not working.

      I checked the fuse and it was good. Here is the readings from the regulators.
      Attached Files
      My Spelling and Grammer Sucks.

      Comment

      • attainteddragon
        Badcaps Veteran
        • Apr 2013
        • 764
        • australia

        #23
        Re: Proscan LED 32" TV not working.

        this looks like an adjustable regulator, so output should be 1.25v above ground voltage.

        if it is a 3.3v regulator, (can't read bottom line on ic) then it is out of spec as well.
        Attached Files
        Last edited by attainteddragon; 05-27-2017, 02:34 AM.
        WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?

        Comment

        • vinceroger69
          Badcaps Legend
          • Mar 2012
          • 6714
          • uk

          #24
          Re: Proscan LED 32" TV not working.

          if this was my tv i would try and source a replacement mainboard, as long as it matches the numbers on any stickers on your old main board and also matches the lcd panel used in your tv (white sticker on metal tv chassis usually) it maybe the best route too go, as you may replace that regulator then have a eeprom/spi flash ic issue etc so if you can source a mainboard at a good price with returns policy if faulty on arrival i would buy one.

          Comment

          • dskall
            Badcaps Legend
            • Oct 2016
            • 2905
            • usa

            #25
            Re: Proscan LED 32" TV not working.

            Looks like input to first reg. 5.03v and input to third reg. are from same trace but different voltages.
            I assume no responsibility for any stupid suggestions I might post.

            Comment

            • THERED117
              Member
              • May 2017
              • 25
              • USA

              #26
              Re: Proscan LED 32" TV not working.

              Sorry its been a few days. Here is what i have so far. BTW the fuse was good. Zoom in to see the readings.
              Attached Files
              My Spelling and Grammer Sucks.

              Comment

              • THERED117
                Member
                • May 2017
                • 25
                • USA

                #27
                Re: Proscan LED 32" TV not working.

                I could have bought one already. I,m being stubborn. I want to repair if a can lol
                My Spelling and Grammer Sucks.

                Comment

                • attainteddragon
                  Badcaps Veteran
                  • Apr 2013
                  • 764
                  • australia

                  #28
                  Re: Proscan LED 32" TV not working.

                  well, you will need to change out that regulator to start with.
                  WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?

                  Comment

                  • THERED117
                    Member
                    • May 2017
                    • 25
                    • USA

                    #29
                    Re: Proscan LED 32" TV not working.

                    which regulator are you talking about? Why? I'm not arguing, I'm just trying to understand/learn.
                    My Spelling and Grammer Sucks.

                    Comment

                    • attainteddragon
                      Badcaps Veteran
                      • Apr 2013
                      • 764
                      • australia

                      #30
                      Re: Proscan LED 32" TV not working.

                      the one i marked earlier as being out of spec.
                      WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?

                      Comment

                      • THERED117
                        Member
                        • May 2017
                        • 25
                        • USA

                        #31
                        Re: Proscan LED 32" TV not working.

                        gotcha thanks. I overlooked the thumbnail.
                        My Spelling and Grammer Sucks.

                        Comment

                        • vinceroger69
                          Badcaps Legend
                          • Mar 2012
                          • 6714
                          • uk

                          #32
                          Re: Proscan LED 32" TV not working.

                          with that 3rd regulator it does seem odd that the trace at the left regulator is 5v but when it reaches the third regulator on the same trace its down too 3v volts so yes maybe double check voltage readings if still odd maybe change the regulator

                          Comment

                          • THERED117
                            Member
                            • May 2017
                            • 25
                            • USA

                            #33
                            Re: Proscan LED 32" TV not working.

                            So I know it been awhile but I finely bought a board...... Problem now is the PS board. Ive got one on order but i would like to know what died. At the moment I only have one question. Is it normal for a heat sink to be electrified? IE I'm getting 60 ish VAC on the left heat sink.
                            My Spelling and Grammer Sucks.

                            Comment

                            • vinceroger69
                              Badcaps Legend
                              • Mar 2012
                              • 6714
                              • uk

                              #34
                              Re: Proscan LED 32" TV not working.

                              yes a lot of power supply heat sinks are live.

                              Comment

                              • budm
                                Badcaps Legend
                                • Feb 2010
                                • 40746
                                • USA

                                #35
                                Re: Proscan LED 32" TV not working.

                                Originally posted by THERED117
                                So I know it been awhile but I finely bought a board...... Problem now is the PS board. Ive got one on order but i would like to know what died. At the moment I only have one question. Is it normal for a heat sink to be electrified? IE I'm getting 60 ish VAC on the left heat sink.
                                I would suggest you to at the very least plug what you are working on into the GFCI outlet.
                                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

                                • Andrew F. Ali
                                  Badcaps Legend
                                  • Jan 2014
                                  • 2450
                                  • Trinidad & Tobago

                                  #36
                                  Re: Proscan LED 32" TV not working.

                                  So did you get the TV going by installing the new Main Bd you got? Did the older posts not confirm the PSU was OK? Did you mess with PSU and now destroyed it?

                                  Comment

                                  • THERED117
                                    Member
                                    • May 2017
                                    • 25
                                    • USA

                                    #37
                                    Re: Proscan LED 32" TV not working.

                                    I changed out the main board with no luck. When it didn't work I checked the output from my PS and and found that there was no voltage. I had voltage up to the transformer so I didn't dig into it too deep. I was going to take the easy quick way out and buy the PS. So now I have another PS and the problem is unchanged. Also there is no stand by light.
                                    Last edited by THERED117; 04-06-2018, 01:19 AM.
                                    My Spelling and Grammer Sucks.

                                    Comment

                                    • THERED117
                                      Member
                                      • May 2017
                                      • 25
                                      • USA

                                      #38
                                      Re: Proscan LED 32" TV not working.

                                      GFCI is a welcomed idea. lol
                                      My Spelling and Grammer Sucks.

                                      Comment

                                      • vinceroger69
                                        Badcaps Legend
                                        • Mar 2012
                                        • 6714
                                        • uk

                                        #39
                                        Re: Proscan LED 32" TV not working.

                                        its odd as in your earlier posts the psu checked out fine but then you say its lost the voltages, so you have now replaced the main board and another psu and still same issues? i would leave your two new boards in if they are the exact same board numbers including any details on stickers etc, then i would re test all the psu voltages and post your results please let us know what it says by each pin and the voltages you are getting.

                                        Comment

                                        • THERED117
                                          Member
                                          • May 2017
                                          • 25
                                          • USA

                                          #40
                                          Re: Proscan LED 32" TV not working.

                                          Ok. I will as soon as i get a chance this weekend. Thanks
                                          My Spelling and Grammer Sucks.

                                          Comment

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