Lenovo Thinkpad E15 Gen 2 NM-D011 - No display ? External , yes!

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  • AccountSaver
    Badcaps Veteran
    • Dec 2016
    • 416
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    #21
    Originally posted by m1ch43lzm
    https://pcsupport.lenovo.com/id/en/p.../display/model
    According to the full model 20TD00GNUK i get only these options, you can enter the serial number at that web site to get the exact parts used

    Mars1.0INTELFRUCABLEMars1.0IntelEDPCABLEIR
    Part No: 5C10Z23917

    Camera,HD-IR,Front,2MIC,ZIF,Azw
    Part No: 5C20W42992
    Substitutes: 5C20W42993 and 5C20W42994
    Click image for larger version Name:	5C20W42993_A.jpg Views:	0 Size:	36.2 KB ID:	3635821
    And it says exactly what you posted SC20F27116 (for 5C20W42993), so it's an IR webcam, on the regular 720p cameras if i select only 20TD the number on the sticker is completely different

    You can click on the images on the lenovo parts site and check
    The serial number is: PF3JCYGJ (i had written above... ) again it shows 2 camera suitable for that laptop as a replacement .

    Oh my god imagine receiving another cable that it's not compatible with that hahah in 2 weeks haha...

    Comment

    • m1ch43lzm
      Badcaps Veteran
      • Mar 2019
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      #22
      You meant
      Camera,HD-IR,Front,2MIC,ZIF,Bsn Part No: 5C20W42993

      Camera,HD-IR,Front,2MIC,ZIF,Azw
      Part No: 5C20W42992

      They're equivalent, both IR, listed as substitutes for each other, the LCD cable is the same 5C10Z23917

      Likely they grab whatever supplier they got cheaper for a given batch

      EDIT: Go figure, I just got an ebay ad on this forum (browsing from my phone) for "EDP Screen Cable+RGB Camera IR Cable DC02C00MF10 for Lenovo ThinkPad E15 Gen2" Coincidence?

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      • AccountSaver
        Badcaps Veteran
        • Dec 2016
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        #23
        Originally posted by m1ch43lzm
        You meant
        Camera,HD-IR,Front,2MIC,ZIF,Bsn Part No: 5C20W42993

        Camera,HD-IR,Front,2MIC,ZIF,Azw
        Part No: 5C20W42992

        They're equivalent, both IR, listed as substitutes for each other, the LCD cable is the same 5C10Z23917

        Likely they grab whatever supplier they got cheaper for a given batch

        EDIT: Go figure, I just got an ebay ad on this forum (browsing from my phone) for "EDP Screen Cable+RGB Camera IR Cable DC02C00MF10 for Lenovo ThinkPad E15 Gen2" Coincidence?
        Indeed.

        I will sell the other one, with the exact details, as we have found out (you basically) on eBay when time will come for someone to buy it ,because that way i 'm just throwing money... 2 weeks left ...

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        • AccountSaver
          Badcaps Veteran
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          #24
          Originally posted by m1ch43lzm
          https://pcsupport.lenovo.com/id/en/p.../display/model
          According to the full model 20TD00GNUK i get only these options, you can enter the serial number at that web site to get the exact parts used

          Mars1.0INTELFRUCABLEMars1.0IntelEDPCABLEIR
          Part No: 5C10Z23917

          Camera,HD-IR,Front,2MIC,ZIF,Azw
          Part No: 5C20W42992
          Substitutes: 5C20W42993 and 5C20W42994
          Click image for larger version Name:	5C20W42993_A.jpg Views:	0 Size:	36.2 KB ID:	3635821
          And it says exactly what you posted SC20F27116 (for 5C20W42993), so it's an IR webcam, on the regular 720p cameras if i select only 20TD the number on the sticker is completely different

          You can click on the images on the lenovo parts site and check
          Yes , the day has come.

          Yes, the cable arrived , yes i changed it, also i changed the fuse just to be sure, and just to be sure the FPC connector. The laptop doesn't anymore shows signs of ground beeping ,and it can power on with charger connected and ,screen cable connected.
          I cannot believe that the cable was the problem that didn't allow it to turn on.

          But!

          The laptop still shows in external screen but internal screen doesn't . But the new let's say symptom is that the screen flickrs like it tries to show something ,for 0.000001ms it does like a flash from black to backlight black but again still remains the same.

          I did update the BIOS to the latest one to be sure, again same nothing changed....

          I have given up.

          Comment

          • m1ch43lzm
            Badcaps Veteran
            • Mar 2019
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            #25
            Does the screen show an image if you shine a flashlight to it?

            EDIT: Now we have to figure out what prompted your customer to replace the LCD cable in the first place, so I think the original fault is what you have now

            Measure +LCDVDD_CON, BL_ON and PANEL_PWM
            Last edited by m1ch43lzm; 06-05-2025, 08:21 AM.

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            • AccountSaver
              Badcaps Veteran
              • Dec 2016
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              #26
              Originally posted by m1ch43lzm
              Does the screen show an image if you shine a flashlight to it?

              EDIT: Now we have to figure out what prompted your customer to replace the LCD cable in the first place, so I think the original fault is what you have now

              Measure +LCDVDD_CON, BL_ON and PANEL_PWM
              No backlight , i tried maybe to see a logo or something as usual to understand 100% the problem , but again nothing.
              The flickr of the image is ... imagine a black color and then if you press the power button for a split mini 0.00001 sec like a spark it shows a change from black to ultra black ... if i can explain it somehow ,the black light up a little.

              Other than that nothing more.

              Where , to check those lines ?

              I still cannot believe, that he tried to change the cable , and did a hole in the FPC connector , and it could happen due to the old cable

              Comment

              • m1ch43lzm
                Badcaps Veteran
                • Mar 2019
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                #27
                https://www.badcaps.net/forum/troubl...ic#post1718498

                Schematics post #9, board view post #11, the boardview posted by "Lisa Su" you unrar, then rename the extension from GE4B0.fz to .tvw, open with flexbv free

                like a spark it shows a change from black to ultra black
                I think i understand what you mean, on IPS panels when off they look black even when shining a flashlight, when the panel gets energized gets a bit blacker before backlight comes on
                On TN panels when off it's a dark green color, more noticeable with a flashlight, then turn black when powered on

                LCDVDD is pins 18-19 of the LCD connector, you can measure it at CG11, CG24, or at pin 1 of UG1, should be 3.3v
                PANEL_PWM, pin 8 and BL_ON, pin 9 of the LCD connector, those go to the back of the board, the boardview will help identify some resistors where you can probe those signals
                Click image for larger version

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                • AccountSaver
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                  #28
                  Originally posted by m1ch43lzm
                  https://www.badcaps.net/forum/troubl...ic#post1718498

                  Schematics post #9, board view post #11, the boardview posted by "Lisa Su" you unrar, then rename the extension from GE4B0.fz to .tvw, open with flexbv free


                  I think i understand what you mean, on IPS panels when off they look black even when shining a flashlight, when the panel gets energized gets a bit blacker before backlight comes on
                  On TN panels when off it's a dark green color, more noticeable with a flashlight, then turn black when powered on

                  LCDVDD is pins 18-19 of the LCD connector, you can measure it at CG11, CG24, or at pin 1 of UG1, should be 3.3v
                  PANEL_PWM, pin 8 and BL_ON, pin 9 of the LCD connector, those go to the back of the board, the boardview will help identify some resistors where you can probe those signals
                  Click image for larger version  Name:	Captura de pantalla 2025-06-05 155024.png Views:	0 Size:	160.1 KB ID:	3653107
                  Click image for larger version

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                  UG1..
                  Attached Files

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                  • AccountSaver
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                    • Dec 2016
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                    #29
                    Plus i see that the capacitors are not there...CG24 and CG11...
                    Maybe when he tried to fix it he ripped them out ?!

                    Comment

                    • m1ch43lzm
                      Badcaps Veteran
                      • Mar 2019
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                      #30
                      Measure with laptop powered on, lid open, keyboard facing down on the table to make it easier for you
                      You should also get the enable signal (3.3v) at pin 4 to enable UG1, and the output should be 3.3v
                      Click image for larger version  Name:	ug1.jpg Views:	0 Size:	12.9 KB ID:	3653519
                      Attached Files
                      Last edited by m1ch43lzm; 06-06-2025, 07:07 AM.

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                      • AccountSaver
                        Badcaps Veteran
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                        #31
                        Originally posted by m1ch43lzm
                        Measure with laptop powered on, lid open, keyboard facing down on the table to make it easier for you
                        You should also get the enable signal (3.3v) at pin 4 to enable UG1, and the output should be 3.3v
                        Click image for larger version Name:	ug1.jpg Views:	0 Size:	12.9 KB ID:	3653519
                        Nice hint i was trying to turn myself around etc.

                        Yes, they are as you show me.

                        3.35 to 4.5 and 1.
                        2 and 3 are 0.00

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                        • AccountSaver
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                          #32
                          Plus i see that the capacitors are not there...CG24 and CG11...

                          Maybe when he tried to fix it he ripped them out ?!

                          I should order them i believe....​

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                          • m1ch43lzm
                            Badcaps Veteran
                            • Mar 2019
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                            #33
                            Voltages look fine, the panel is getting power
                            Try doing an LCD self test according to the e15 gen2 hardware maintenance manual

                            LCD Self Test
                            When you turn on the computer and the LCD goes black, run LCD Self Test to help you determine whether the LCD functions normally.

                            To run LCD Self Test:
                            1. Ensure that the computer is connected to ac power. Then, press the power button for about seven seconds to turn off the computer.
                            2. Press Fn, left Ctrl, and the power button at the same time. If the computer displays five solid colors in sequence across the entire screen, it indicates that the LCD functions normally.
                            3. The test lasts for about 20 seconds and then exits automatically. You also can press the power button to exit the test.

                            Comment

                            • AccountSaver
                              Badcaps Veteran
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                              #34
                              Originally posted by m1ch43lzm
                              Voltages look fine, the panel is getting power
                              Try doing an LCD self test according to the e15 gen2 hardware maintenance manual

                              nope ,it doesn't.

                              Comment

                              • m1ch43lzm
                                Badcaps Veteran
                                • Mar 2019
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                                #35
                                Do you still have the working E15 gen2? To check if the LCD self test procedure works there

                                Comment

                                • SMDFlea
                                  Super Moderator
                                  • Jan 2018
                                  • 20279
                                  • UK

                                  #36
                                  Did you check BL_ON
                                  All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

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                                  • AccountSaver
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                                    #37
                                    Originally posted by m1ch43lzm
                                    Do you still have the working E15 gen2? To check if the LCD self test procedure works there
                                    No ,it was returned.

                                    The screen is 100% working. As it has been tested to a 14" that i have on the side , it works like a charm (it's the original screen of the Lenovo ,as i have teared apart the sticker of the screen) it was never opened.

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                                    • AccountSaver
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                                      #38
                                      Originally posted by SMDFlea
                                      Did you check BL_ON
                                      How to check BL_ON ?

                                      Comment

                                      • m1ch43lzm
                                        Badcaps Veteran
                                        • Mar 2019
                                        • 239
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                                        #39
                                        Originally posted by m1ch43lzm
                                        https://www.badcaps.net/forum/troubl...ic#post1718498

                                        Schematics post #9, board view post #11, the boardview posted by "Lisa Su" you unrar, then rename the extension from GE4B0.fz to .tvw, open with flexbv free
                                        .....
                                        PANEL_PWM, pin 8 and BL_ON, pin 9 of the LCD connector, those go to the back of the board, the boardview will help identify some resistors where you can probe those signals
                                        Alternate point for BL_ON is on the back side of the board, get the schematics and board view if you haven't already
                                        R4618, it's either a 0 ohm resistor or a trace, according to schematics it should be "high"
                                        Or at DG13, it could be missing but the pads are there, if it's bypassed by R4618, sometimes the engineers place parts on the schematics that are not used in the final production version...

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                                        • AccountSaver
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                                          #40
                                          Originally posted by SMDFlea
                                          Did you check BL_ON
                                          Originally posted by m1ch43lzm
                                          Alternate point for BL_ON is on the back side of the board, get the schematics and board view if you haven't already
                                          R4618, it's either a 0 ohm resistor or a trace, according to schematics it should be "high"
                                          Or at DG13, it could be missing but the pads are there, if it's bypassed by R4618, sometimes the engineers place parts on the schematics that are not used in the final production version...
                                          Sorry for my late reply , i was away.

                                          Yes, i checked both of R4618 and DG13 and they show the same values.

                                          Click image for larger version

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