30" Dell Ultrasharp U3011T troubles

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • eriksalo
    Member
    • Feb 2014
    • 22
    • United States

    #21
    Re: 30" Dell Ultrasharp troubles

    Originally posted by Davi.p
    Post at least an hires image of tcon, we can find those points to test others voltages, i cannot find it in the web, you can buy it at:
    http://www.lcd-chip.com/ViewDetails12873.aspx
    Here are pictures of the T-CON. I think you can read all the labels. I've circled in yellow (first pic, lower left) where I measured VGH and VGL.

    Thanks again for all the help!
    Attached Files

    Comment

    • selldoor
      Slow Learner
      • Dec 2010
      • 7870

      #22
      Re: 30" Dell Ultrasharp troubles

      I may be missing something here (often do) but I see you have marked VGH but VGL
      seems to be elsewhere (from VGH up and across U2)
      Please upload pictures using attachment function when ask for help on the repair
      http://www.badcaps.net/forum/showthread.php?t=39740

      Comment

      • eriksalo
        Member
        • Feb 2014
        • 22
        • United States

        #23
        Re: 30" Dell Ultrasharp troubles

        Originally posted by selldoor
        I may be missing something here (often do) but I see you have marked VGH but VGL
        seems to be elsewhere (from VGH up and across U2)
        Right you are... A mistake of photo editing, not of measurement . I re-marked with the correct VGL. That is where I measured. If you zoom in, you can see the little mark made by my scope probe when I traced it. New pic attached.
        Attached Files
        Last edited by eriksalo; 02-10-2014, 03:04 PM.

        Comment

        • Davi.p
          Hobbist
          • Sep 2009
          • 4264
          • Italy - Milan

          #24
          Re: 30" Dell Ultrasharp troubles

          The point to test are VLCD, VDD, VCC, 1,8V, i don't have the right value but you can search the web for for example: "LM300WQ5 (VLCD OR VDD OR VCC OR 1,8V)" you can find other user that have posted their values and so compare..
          Last edited by Davi.p; 02-10-2014, 03:52 PM.

          Comment

          • eriksalo
            Member
            • Feb 2014
            • 22
            • United States

            #25
            Re: 30" Dell Ultrasharp troubles

            Originally posted by Davi.p
            The point to test are VLCD, VDD, VCC, 1,8V, i don't have the right value but you can search the web for for example: "LM300WQ5 (VLCD OR VDD OR VCC OR 1,8V)" you can find other user that have posted their values and so compare..
            Thanks for the idea. VLCD was the only parameter I was able to find a spec for and it's in range. Here are the results:

            VLCD: Measured 17.83V, Spec 18.0 +/-1 (In Range)
            VDD: Measured 15.44 VDC
            VCC: Measured 3.32 VDC (this seems right)
            VGH: Measured 23.89
            VGL: Measured -7.45 (last time was -10.5)

            Comment

            • eriksalo
              Member
              • Feb 2014
              • 22
              • United States

              #26
              Re: 30" Dell Ultrasharp troubles

              Given all the great responses, I am going to order a new T-CON board.

              It seems there's a good chance this monitor is repairable and I haven't been able to find anything obviously wrong with the T-CON so I will hope the main chip is fried and that a new one will fix it. $50 is a small price to pay to try and fix such an expensive monitor.

              I will post results later this week, thanks again for all the replies.

              Erik

              Comment

              • Topcat
                The Boss Stooge
                • Oct 2003
                • 16955
                • United States

                #27
                Re: 30" Dell Ultrasharp troubles

                Originally posted by eriksalo

                I will post results later this week, thanks again for all the replies.

                Erik
                I too have been keeping a close eye on this thread. I hope you get 'er goin!
                <--- Badcaps.net Founder

                Badcaps.net Services:

                Motherboard Repair Services

                ----------------------------------------------
                Badcaps.net Forum Members Folding Team
                http://folding.stanford.edu/
                Team : 49813
                Join in!!
                Team Stats

                Comment

                • eriksalo
                  Member
                  • Feb 2014
                  • 22
                  • United States

                  #28
                  Re: 30" Dell Ultrasharp U3011T troubles

                  I got a T-CON board and a main board from payless components.

                  So Sad! Symptoms are the same after replacing both boards.

                  Any ideas where to go next? I plan to take apart the panel casing and have a look but.....

                  Comment

                  • selldoor
                    Slow Learner
                    • Dec 2010
                    • 7870

                    #29
                    Re: 30" Dell Ultrasharp U3011T troubles

                    read up up fixing tab bonds we already gave a few links. Main thing is to be careful and not do more damage getting panel from frame. At least looking at this will not involve further outlay.
                    Please upload pictures using attachment function when ask for help on the repair
                    http://www.badcaps.net/forum/showthread.php?t=39740

                    Comment

                    • Davi.p
                      Hobbist
                      • Sep 2009
                      • 4264
                      • Italy - Milan

                      #30
                      Re: 30" Dell Ultrasharp U3011T troubles

                      i dont think is a fpc problem, erik in post 8 has already tried pushing those.. it can be at least 2 chips on the screen's board, and discrete components, those could be tested/changed.

                      Comment

                      • Lumberjack777
                        Badcaps Veteran
                        • Dec 2010
                        • 464

                        #31
                        Re: 30" Dell Ultrasharp U3011T troubles

                        I think a likely candidate is the >>> LVDS cable <<<<. Or the T-Con ribbons.
                        I always include those when I sell a main board or T-Con board on eBay.
                        I won't need them, but the buyer just might.

                        Comment

                        • Topcat
                          The Boss Stooge
                          • Oct 2003
                          • 16955
                          • United States

                          #32
                          Re: 30" Dell Ultrasharp U3011T troubles

                          Originally posted by eriksalo
                          I got a T-CON board and a main board from payless components.

                          So Sad! Symptoms are the same after replacing both boards.

                          Any ideas where to go next? I plan to take apart the panel casing and have a look but.....
                          Darn....the panel is gone....and thats what I needed!!

                          Ohh well, looks like you're in the same boat as me.....a boat with a really cool anchor!!
                          <--- Badcaps.net Founder

                          Badcaps.net Services:

                          Motherboard Repair Services

                          ----------------------------------------------
                          Badcaps.net Forum Members Folding Team
                          http://folding.stanford.edu/
                          Team : 49813
                          Join in!!
                          Team Stats

                          Comment

                          • eriksalo
                            Member
                            • Feb 2014
                            • 22
                            • United States

                            #33
                            Re: 30" Dell Ultrasharp U3011T troubles

                            I removed the bezel from the monitor so I could access the tab bonds.

                            For all the world, the tab bonds seem FINE. Visual inspection shows nothing. I can't change the picture by gently touching the tabs. Is this common?

                            Flex cables from tab bonds board to T-Con looks fine. I will mic out the LVDS connections next. As reminder, I tried new T-Con and main boards.

                            I've posted a second video showing the screen while I'm manipulating the tab bonds.

                            A real mystery! Video is here:

                            http://youtu.be/KyRYQwcVdvI
                            Last edited by eriksalo; 02-15-2014, 11:50 AM.

                            Comment

                            • eriksalo
                              Member
                              • Feb 2014
                              • 22
                              • United States

                              #34
                              Re: 30" Dell Ultrasharp U3011T troubles

                              I've decided to officially give up on this one and let someone else try.

                              Have a look at my new project, a Dell 30" 3007. It won't go into high resolution (and it's not the cables).

                              https://www.badcaps.net/forum/showthread.php?t=35515

                              Thanks for all your help.

                              Comment

                              • ktzz
                                Member
                                • Oct 2014
                                • 28
                                • singapore

                                #35
                                Re: 30" Dell Ultrasharp U3011T troubles

                                i got two dell u3011. power problem!
                                Last edited by ktzz; 10-14-2014, 10:29 AM.

                                Comment

                                Related Topics

                                Collapse

                                Working...