Toshiba 42HL67

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  • CraigR
    Badcaps Veteran
    • Dec 2013
    • 959
    • USA

    #1

    Toshiba 42HL67

    Toshiba 42HL67 has and issue I have not run across and that only the top 25% of the screen shows and the rest is black. I though TCON but If I'm thinking correctly that woul be a left half or right half of screen issue. Not sure where to start on this one so any help is always appreciated.
    Attached Files
  • Dgtech
    E. Technician
    • Apr 2009
    • 1462
    • Steeler

    #2
    Re: Toshiba 42HL67

    The T-conn board should be the cheapest of the boards to replace. Try that first.
    Last edited by Dgtech; 04-12-2014, 07:32 PM.
    The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

    Comment

    • CraigR
      Badcaps Veteran
      • Dec 2013
      • 959
      • USA

      #3
      Re: Toshiba 42HL67

      I am thinking it would not be the TCON because that controls left and right sides vertically right?

      Comment

      • Dgtech
        E. Technician
        • Apr 2009
        • 1462
        • Steeler

        #4
        Re: Toshiba 42HL67

        My little summary is not exact for all TV's but somewhat effective:
        1.The power board controls most/all power distribution.
        2.The main board does the processing and signal distribution.
        3.The Inverters do the low voltage to high voltage conversion only for backlights
        4. The T-Conn board do more of a analog to digital conversion for the placement of seen pictures on screen.

        This isn't exact but its an easy way to look at the LCD TV's
        The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

        Comment

        • Dgtech
          E. Technician
          • Apr 2009
          • 1462
          • Steeler

          #5
          Re: Toshiba 42HL67

          It too could be a tab bond issue. Those are kinda hard to fix and most, that I heard of, have problems after the fix is applied. The direction you are headed for goes like this: buy the T-conn board and swap it out. If that doesn't work.......

          I had a chance to buy different sets like this to try to fix them. I had no luck with one before and got burned on it. And... I also had one that I fixed with the T-conn replacement. So... it could go either way.
          The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

          Comment

          • CraigR
            Badcaps Veteran
            • Dec 2013
            • 959
            • USA

            #6
            Re: Toshiba 42HL67

            Just bought a TCON so I will report back once I get it and install. Maybe subscribe to this thread if you want to see if that fixes it.

            Comment

            • philliesfan30m
              Badcaps Veteran
              • Aug 2013
              • 542
              • USA

              #7
              Re: Toshiba 42HL67

              did you try to flex the screen or apply pressure to where the fault occurs around the edges and see if it changes at all? if it changes when doing that then it is most likely a tab bond issue. i do know that quite a few of the regza's did have problems with panel failure do main to tab bond issues if i remember correctly. i had 1 that had vertical lines. so that might be a t-con problem. did you try to clean and reseat the cable to the t-con and from the t-con to the panel?

              Comment

              • CraigR
                Badcaps Veteran
                • Dec 2013
                • 959
                • USA

                #8
                Re: Toshiba 42HL67

                Cleaned and reset the 2 cables but a little hard to twist the TV so I will pst back when I get the TCON board.

                Comment

                • CraigR
                  Badcaps Veteran
                  • Dec 2013
                  • 959
                  • USA

                  #9
                  Re: Toshiba 42HL67

                  Well put in a TCON and that did nothing so money wasted and back to square one.

                  Comment

                  • ecking767
                    Badcaps Veteran
                    • Oct 2009
                    • 492
                    • USA

                    #10
                    Re: Toshiba 42HL67

                    Originally posted by CraigR
                    Well put in a TCON and that did nothing so money wasted and back to square one.
                    can you post a picture of your T-CON board or a part number, I look up this model tv on shopjimmy, I see on one of the T-CON board listed, there is the famous AS15-F on board, which is known to go bad.

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #11
                      Re: Toshiba 42HL67

                      90% sure this is a panel fault, AS15F has nothing to do with it.
                      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

                      • CraigR
                        Badcaps Veteran
                        • Dec 2013
                        • 959
                        • USA

                        #12
                        Re: Toshiba 42HL67

                        Screen shot then Tom? here is the TCON I put in.
                        Attached Files

                        Comment

                        • Shinju
                          Badcaps Legend
                          • Mar 2014
                          • 1239
                          • USA

                          #13
                          Re: Toshiba 42HL67

                          Have you tried the frozen air trick or applying pressure to the panels ribbon cables?

                          Comment

                          • CraigR
                            Badcaps Veteran
                            • Dec 2013
                            • 959
                            • USA

                            #14
                            Re: Toshiba 42HL67

                            Did not pull it down that far yet. Where should I try the frozen air on? The cables also?

                            Comment

                            • CraigR
                              Badcaps Veteran
                              • Dec 2013
                              • 959
                              • USA

                              #15
                              Re: Toshiba 42HL67

                              Yep screen is toast! top tab on the side. I can push on it and bottom of screen works but still has a white line horizontal through it.

                              Comment

                              • philliesfan30m
                                Badcaps Veteran
                                • Aug 2013
                                • 542
                                • USA

                                #16
                                Re: Toshiba 42HL67

                                that sucks! thats why i asked you to check the tab bonds before ordering a board cause those sets are known for panel faults. you gonna try and fix the tab bonds or scrap it?

                                Comment

                                • CraigR
                                  Badcaps Veteran
                                  • Dec 2013
                                  • 959
                                  • USA

                                  #17
                                  Re: Toshiba 42HL67

                                  I tried to fix it but still had line through it so I just scraped it out.

                                  Comment

                                  • Shinju
                                    Badcaps Legend
                                    • Mar 2014
                                    • 1239
                                    • USA

                                    #18
                                    Re: Toshiba 42HL67

                                    I noticed on my 37HL17, those 4 ribbon cables from the T-con go into 2 separate boards at the top of the panal. Both of them were warped. I didn't have any screen issues but I did put a couple of polyurethane shims to keep them level. I have put over 40 hours on the TV non stop since I corrected the RCut/drive issues and its been working like a champ.

                                    Comment

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