Lenovo IPad 320-15IKB eDP failure

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  • the Benninger
    Senior Member
    • Nov 2022
    • 189
    • venezulan

    #1

    Lenovo IPad 320-15IKB eDP failure

    Specifically I enter with the connector very damaged, from another service it did not start correctly, I redid the BIOS now it turns on normal, it only generates image through the HDMI port it does not generate image in the display which I already discarded by placing the eDP cable and the LCD new

    a cut in a track 14 jumping it with a small piece of cable can you see
    MoBo is NM-B242 Rev 1.0

    I leave photos and readings of the 30 pins that I made with the multimeter, thank you very much for those who can extend their hand
    Click image for larger version

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    Attached Files
  • mcplslg123
    Badcaps Legend
    • Jun 2015
    • 7262
    • india

    #2
    +LCDVDD_CON is missing. Check voltages on pin 1/4/5 of U5.

    Comment

    • the Benninger
      Senior Member
      • Nov 2022
      • 189
      • venezulan

      #3
      thanks for taking interest @mcpisig123, I located the U5 transistor I took a picture and added the values of the measurement, it is curious but I did not find datashett of this component
      Attached Files

      Comment

      • the Benninger
        Senior Member
        • Nov 2022
        • 189
        • venezulan

        #4
        hey mcplslg123 Could you help me the signal that appears on the pin one appears for a brief moment when the computer starts then it is lost, it marks zero after a couple of seconds, just in case you know who sends the signal to activate if you are so kind as to indicate

        Comment

        • mcplslg123
          Badcaps Legend
          • Jun 2015
          • 7262
          • india

          #5
          Check Resistance to GND on pin1(without power)
          If the reistance is High on pin1, jumper between pin5 and pin1 of U5(component still being removed).
          Try again.

          Comment

          • the Benninger
            Senior Member
            • Nov 2022
            • 189
            • venezulan

            #6
            resistance to GND to pin 1 is 173k hom, I did the bypass as you indicated and the screen worked again I thank you for the help this equipment had given me many problems it was very damaged
            I appreciate the time you took to indicate the solution I hope it multiplies by a thousand in equipment that you receive to repair -thanks u
            Attached Files

            Comment

            • mcplslg123
              Badcaps Legend
              • Jun 2015
              • 7262
              • india

              #7
              Happy to know it helped you and thanks for your good wishes.

              Comment

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