Dell E5440 no display output on monitor and VGA BUT works on HDMI!

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  • Andreasbest
    Badcaps Legend
    • Aug 2014
    • 1146
    • Hellas ( Greece )

    #1

    Dell E5440 no display output on monitor and VGA BUT works on HDMI!

    Hello!
    I received s E5440 with small water damage, cleaned it with isopropelene and looks like new.
    The problem is that there is no display on integrated screen neither on VGA output but works great through HDMI.
    Any ideas?

    Schematics and boardview attached, thank you in advance!
    Attached Files
  • mcplslg123
    Badcaps Legend
    • Jun 2015
    • 7262
    • india

    #2
    Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

    Why not include the measurement on lvds/edp connector pins??

    Comment

    • Andreasbest
      Badcaps Legend
      • Aug 2014
      • 1146
      • Hellas ( Greece )

      #3
      Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

      Because of the water dage not sure from where you want me to start, i'll do it asap.

      Comment

      • Andreasbest
        Badcaps Legend
        • Aug 2014
        • 1146
        • Hellas ( Greece )

        #4
        Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

        Hello!
        Sorry for the delay but had other important tasks to complete, now i have it back to the bench.
        The voltages at JLVDS1 are:
        pin2 3.3v
        pin8 3.3v
        pin9 13.5v
        pin14 3.3v
        pin35 3.3v
        pin36 3.3v

        Just to mention the specific laptop has integrated touch screen!

        Comment

        • SMDFlea
          Super Moderator
          • Jan 2018
          • 20557
          • UK

          #5
          Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

          Originally posted by Andreasbest
          Hello!
          I received s E5440 with small water damage, cleaned it with isopropelene and looks like new.
          The problem is that there is no display on integrated screen neither on VGA output but works great through HDMI.
          Any ideas?

          Schematics and boardview attached, thank you in advance!
          Where was the water damage,post a picture of the area.
          All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

          Comment

          • Andreasbest
            Badcaps Legend
            • Aug 2014
            • 1146
            • Hellas ( Greece )

            #6
            Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

            The area right under U38 and left of the connector JTP1
            Attached 2 magnified pictures and 1 with the whole area.
            Attached Files

            Comment

            • mcplslg123
              Badcaps Legend
              • Jun 2015
              • 7262
              • india

              #7
              Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

              Did you checked RTD2136S requirements. If you have this controller, replace it if you dont want to troubleshoot.

              Comment

              • Andreasbest
                Badcaps Legend
                • Aug 2014
                • 1146
                • Hellas ( Greece )

                #8
                Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                I'm not sure if i understand, the problem is on this controller and needs replacement?

                Comment

                • rediii
                  h???, spurrrn
                  • Mar 2018
                  • 485
                  • somewhere in europe

                  #9
                  Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                  Originally posted by Andreasbest
                  I'm not sure if i understand, the problem is on this controller and needs replacement?
                  did you try another screen, voltages on pins 12, 38, 39/40? did you measure pin 9/10/11 with power cable only connected? do you have no display ouput on internal screen at all? is bkl there? or no bkl, but picture?
                  Last edited by rediii; 03-23-2022, 02:07 AM.

                  Comment

                  • Andreasbest
                    Badcaps Legend
                    • Aug 2014
                    • 1146
                    • Hellas ( Greece )

                    #10
                    Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                    No i haven't tried another screen
                    Voltages only on the pins i mention
                    All measurements only with power cable connected
                    No display at all, total black no picture (as far the touch glass allows me to see)

                    Comment

                    • rediii
                      h???, spurrrn
                      • Mar 2018
                      • 485
                      • somewhere in europe

                      #11
                      Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                      Originally posted by Andreasbest
                      No i haven't tried another screen
                      Voltages only on the pins i mention
                      All measurements only with power cable connected
                      No display at all, total black no picture (as far the touch glass allows me to see)
                      check for requirements for voltages on pin 38, 39/40

                      Comment

                      • Andreasbest
                        Badcaps Legend
                        • Aug 2014
                        • 1146
                        • Hellas ( Greece )

                        #12
                        Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                        Originally posted by rediii
                        check for requirements for voltages on pin 38, 39/40
                        What do you mean "check for requirements"?

                        Comment

                        • rediii
                          h???, spurrrn
                          • Mar 2018
                          • 485
                          • somewhere in europe

                          #13
                          Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                          Originally posted by Andreasbest
                          What do you mean "check for requirements"?
                          follow the circuits and measure the ics/smd components (reverse). check for enable signals/inputs and outputs

                          Comment

                          • Andreasbest
                            Badcaps Legend
                            • Aug 2014
                            • 1146
                            • Hellas ( Greece )

                            #14
                            Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                            Unfortunately i'm not that expert in repairing circuits, can you please be more specific?

                            Comment

                            • mcplslg123
                              Badcaps Legend
                              • Jun 2015
                              • 7262
                              • india

                              #15
                              Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                              Originally posted by Andreasbest
                              I'm not sure if i understand, the problem is on this controller and needs replacement?
                              Cannot say without measurements but this controller often fails. So you can try replacing it.

                              Comment

                              • SMDFlea
                                Super Moderator
                                • Jan 2018
                                • 20557
                                • UK

                                #16
                                Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                                Originally posted by Andreasbest
                                The area right under U38 and left of the connector JTP1
                                Attached 2 magnified pictures and 1 with the whole area.
                                Check all the resistors (resistance in ohms) and blackened caps.Ive highlighted the ones that look bad to me in the picture.Most of them might be ok if you touch them up with a bit of flux and solder
                                Attached Files
                                Last edited by SMDFlea; 03-23-2022, 10:54 AM.
                                All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                                Comment

                                • Andreasbest
                                  Badcaps Legend
                                  • Aug 2014
                                  • 1146
                                  • Hellas ( Greece )

                                  #17
                                  Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                                  Originally posted by mcplslg123
                                  Cannot say without measurements but this controller often fails. So you can try replacing it.
                                  Do you want to provide you some measurements to make sure it's faulty or not?
                                  I don't have this controller and i must order it.

                                  Comment

                                  • Andreasbest
                                    Badcaps Legend
                                    • Aug 2014
                                    • 1146
                                    • Hellas ( Greece )

                                    #18
                                    Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                                    bump

                                    Comment

                                    • SMDFlea
                                      Super Moderator
                                      • Jan 2018
                                      • 20557
                                      • UK

                                      #19
                                      Re: Dell E5440 no display output on monitor and VGA BUT works on HDMI!

                                      Originally posted by Andreasbest
                                      bump
                                      Go ahead and buy some,they`re quite cheap.
                                      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                                      Comment

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