Acer 4741 dislay off problem

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  • dspok
    Badcaps Veteran
    • Jan 2014
    • 553
    • Nepal
    #1

    Acer 4741 dislay off problem

    Hello,

    I have Acer Aspire 4741 with board 09920-3 JE40-CP MB 48.4GY02.031 machine. It works fine in battery but adapter is inserted display goes off but laptop is running and display never comes back.

    I have adapter plugged in + battery inserted then display goes off after acer logo and laptop still running doesn't turn off if power not pressed.

    Also same thing happens only on adapter.

    I couldn't figure out, is there somebody to help?
    Last edited by SMDFlea; 11-18-2020, 11:17 AM.
    Tags: None
    • dspok
      Badcaps Veteran
      • Jan 2014
      • 553
      • Nepal
      #2
      Re: Acer dislay off problem

      schematic here https://www.badcaps.net/forum/showpo...60&postcount=2

        Comment

        • mcplslg123
          Badcaps Legend
          • Jun 2015
          • 7262
          • india
          #3
          Re: Acer dislay off problem

          Its very likely a bios issue and not hardware issue. Did you flashed known good bios??

            Comment

            • dspok
              Badcaps Veteran
              • Jan 2014
              • 553
              • Nepal
              #4
              Re: Acer dislay off problem

              Originally posted by mcplslg123
              Its very likely a bios issue and not hardware issue. Did you flashed known good bios??
              I will try with bios.

              edit: I can't get official bios becoz SNID 02704936420 not found.
              Can anybody provide me?
              Last edited by dspok; 11-10-2020, 12:14 AM.

                Comment

                • dspok
                  Badcaps Veteran
                  • Jan 2014
                  • 553
                  • Nepal
                  #5
                  Re: Acer dislay off problem

                  i tried official bios and it didn't work, same issue.

                    Comment

                    • stingerchamp
                      Badcaps Veteran
                      • Sep 2020
                      • 425
                      • Pakistan
                      #6
                      Re: Acer dislay off problem

                      Originally posted by dspok
                      Hello,

                      I have Acer Aspire 4741 with board 09920-3 JE40-CP MB 48.4GY02.031 machine. It works fine in battery but adapter is inserted display goes off but laptop is running and display never comes back.

                      I have adapter plugged in + battery inserted then display goes off after acer logo and laptop still running doesn't turn off if power not pressed.

                      Also same thing happens only on adapter.

                      I couldn't figure out, is there somebody to help?
                      Replace adapter,

                        Comment

                        • mcplslg123
                          Badcaps Legend
                          • Jun 2015
                          • 7262
                          • india
                          #7
                          Re: Acer dislay off problem

                          Compare LVDS pins voltage under both the scenarios-when display goes off & when display is ok. You will get the clue.

                            Comment

                            • dspok
                              Badcaps Veteran
                              • Jan 2014
                              • 553
                              • Nepal
                              #8
                              Re: Acer dislay off problem

                              Originally posted by stingerchamp
                              Replace adapter,
                              Not a adapter issue in my opinion, I did checked though.

                              Originally posted by mcplslg123
                              Compare LVDS pins voltage under both the scenarios-when display goes off & when display is ok. You will get the clue.
                              I will give a try, thank you for suggestion.

                                Comment

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