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    #1

    Continued Troubles- Toshiba 32AV500U

    I mentioned this TV in another thread.

    Thread: https://www.badcaps.net/forum/showthread.php?t=52781

    I have replaced the inverter board, and still no backlight. And now no picture. I have done the voltage check on BOTH the Master and the new Slave board. Now, I have, like, 0VDC before and after the fuse on both boards, and, yes, I DID have both boards plugged in. It's like, first just no backlight, and now no backlight and no picture, AND there was a video input connected. It's still responsive to the remote, though. Also, when doing the voltage check, I noticed that the voltage is bouncing between 0.00VDC and 0.1x VDC on both boards. It's like the boards are trying to start up, but they are almost immediately shut down, and then they restart, doing it again. I think the Master board has failed. WHY is it doing this? WHY would replacing the Slave board cause all these problems? WHY would the TV no longer display a picture when it did earlier!? PLEASE HELP!!!
    Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

    My computer doubles as a space heater.

    Permanently Retired Systems:
    RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
    Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


    Kooky and Kool Systems
    - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
    - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
    - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
    - Main Workstation - Fully operational!

    sigpic
    Tags: None
    #2
    Re: Continued Troubles- Toshiba 32AV500U

    Hello!?!?!?!? Is anyone there!? I need this TV repaired!!!!!!!!!!!!!!!!!!!! I've been waiting 2 hours for someone to reply!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Hhhhhhhhhhhhhhhheeeeeeeeeeeeeeeeeeeeeeeeeeeellllllllllllllllllllllllllloooooooooooooooooooooo!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!???????????????????????????????????????????????
    Last edited by TechGeek; 03-14-2016, 06:37 PM. Reason: tv=TV
    Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

    My computer doubles as a space heater.

    Permanently Retired Systems:
    RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
    Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


    Kooky and Kool Systems
    - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
    - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
    - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
    - Main Workstation - Fully operational!

    sigpic

    Comment

      #3
      Re: Continued Troubles- Toshiba 32AV500U

      ^^^Caps lock silencer...
      Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

      My computer doubles as a space heater.

      Permanently Retired Systems:
      RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
      Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


      Kooky and Kool Systems
      - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
      - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
      - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
      - Main Workstation - Fully operational!

      sigpic

      Comment

        #4
        Re: Continued Troubles- Toshiba 32AV500U

        So without the inverter boards connected to the power supply board what DCV do you have on the power supply connector between the main board and the power supply board, and on the connectors that go to the inverter boards?
        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

          #5
          Re: Continued Troubles- Toshiba 32AV500U

          BTW, I wish you stay with the same original thread I had to go back and forth to remind me what were done on the old the thread.
          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

            #6
            Re: Continued Troubles- Toshiba 32AV500U

            Originally posted by budm View Post
            So without the inverter boards connected to the power supply board what DCV do you have on the power supply connector between the main board and the power supply board, and on the connectors that go to the inverter boards?
            What pins to I have to measure?
            Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

            My computer doubles as a space heater.

            Permanently Retired Systems:
            RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
            Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


            Kooky and Kool Systems
            - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
            - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
            - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
            - Main Workstation - Fully operational!

            sigpic

            Comment

              #7
              Re: Continued Troubles- Toshiba 32AV500U

              Fixed or not ?
              Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

              https://www.facebook.com/Telford-Tel...7894576335359/

              Comment

                #8
                Re: Continued Troubles- Toshiba 32AV500U

                Originally posted by TechGeek View Post
                Hello!?!?!?!? Is anyone there!? I need this TV repaired!!!!!!!!!!!!!!!!!!!! I've been waiting 2 hours for someone to reply!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Hhhhhhhhhhhhhhhheeeeeeeeeeeeeeeeeeeeeeeeeeeellllllllllllllllllllllllllloooooooooooooooooooooo!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!???????????????????????????????????????????????
                Err 2 HOURS, Oh My Good-Gawd--The WORLD IS ABOUT TO END!!--Wait at Least Two DAYS--THEN you MAY have summit to whinge about!

                Just because YOU want YOUR TV repaired-NOW- Doesn't mean the World stops turning. We ALL got Lives To Live (And watch our own -Working- TV's) as well!!

                I'm guessing Your PSU is stuffed from the limited proper testing you've done--

                Oh, And, Stop Screaming!!

                (Bloody Selfie Generation, PITA!......)
                Last edited by Alastair E; 06-03-2016, 01:56 PM.
                TELEFIX

                How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
                http://www.irf.com/technical-info/appnotes/an-1088.pdf
                PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

                Comment

                  #9
                  Re: Continued Troubles- Toshiba 32AV500U

                  The TV is fixed, and you can delete this thread.
                  Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

                  My computer doubles as a space heater.

                  Permanently Retired Systems:
                  RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
                  Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


                  Kooky and Kool Systems
                  - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
                  - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
                  - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
                  - Main Workstation - Fully operational!

                  sigpic

                  Comment

                    #10
                    Re: Continued Troubles- Toshiba 32AV500U

                    Originally posted by TechGeek View Post
                    The TV is fixed, and you can delete this thread.
                    So what was done to fix the problem?
                    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

                      #11
                      Re: Continued Troubles- Toshiba 32AV500U

                      Master inverter board failure. Either replace the shorted MOSFETs or replace the board.
                      Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

                      My computer doubles as a space heater.

                      Permanently Retired Systems:
                      RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
                      Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


                      Kooky and Kool Systems
                      - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
                      - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
                      - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
                      - Main Workstation - Fully operational!

                      sigpic

                      Comment

                        #12
                        Re: Continued Troubles- Toshiba 32AV500U

                        Well that did not jive with what you have found before, the fuse for the MASTER inverter was not blown but the Slave inverter did have blown fuse:
                        Originally posted by TechGeek View Post
                        Voltages are:
                        Master:
                        Before fuse: 24VDC
                        After fuse:24VDC
                        Slave:
                        Before fuse: 24VDC
                        After fuse: 2.2VDC
                        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

                          #13
                          Re: Continued Troubles- Toshiba 32AV500U

                          Darnit, got Master and Slave mixed up.
                          Don't buy those $10 PSU "specials". They fail, and they have taken whole computers with them.

                          My computer doubles as a space heater.

                          Permanently Retired Systems:
                          RIP Advantech UNO-3072LA (2008-2021) - Decommissioned and taken out of service permanently due to lack of software support for it. Not very likely to ever be recommissioned again.
                          Asus Q550LF (Old main laptop, 2014-2022) - Decommissioned and stripped due to a myriad of problems, the main battery bloating being the final nail in the coffin.


                          Kooky and Kool Systems
                          - 1996 Power Macintosh 7200/120 + PC Compatibility Card - Under Restoration
                          - 1993 Gateway 2000 80486DX/50 - Fully Operational/WIP
                          - 2004 Athlon 64 Retro Gaming System - Indefinitely Parked
                          - Main Workstation - Fully operational!

                          sigpic

                          Comment

                            #14
                            Re: Continued Troubles- Toshiba 32AV500U

                            Well, the bottom line is that you got it fixed otherwise we would have chased our tails due to mixed up on the MASTER/SLAVE boards.
                            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

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