Lenovo g500 issue

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  • asem18
    Senior Member
    • Oct 2016
    • 112
    • my workshop
    #1

    Lenovo g500 issue

    Hello everyone.
    Lenovo g500 LA-9632P / i7 / intel graphic
    it's turning on ,fan spinning there is backlight but no picture , nothing on external display.
    i flashed bios with 3 dump...no backlight no picture...but on external display just a picture for second than nothing than picture again in repeat ( attached picture ).
    the current don t decrease from 0.80 amp and when there is this picture go to 1 amp.
    what to chek else please...thank you

    Schematics : https://www.badcaps.net/forum/showthread.php?t=42971

    Tags: None
    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india
      #2
      Re: Lenovo g500 issue

      External picture appears and repeat the cycle means its not detecting hdd. Check uefi/legacy settings.

        Comment

        • asem18
          Senior Member
          • Oct 2016
          • 112
          • my workshop
          #3
          Re: Lenovo g500 issue

          Thank you mcplslg for your help...i tried without HDD..

            Comment

            • mcplslg123
              Badcaps Legend
              • Jun 2015
              • 7262
              • india
              #4
              Re: Lenovo g500 issue

              Without hdd, the behaviour is normal.Check with hdd connected whether it boots up to windows screen.

                Comment

                • asem18
                  Senior Member
                  • Oct 2016
                  • 112
                  • my workshop
                  #5
                  Re: Lenovo g500 issue

                  THank you again for your help..i check it with HDD connected...no backlight , no picture...but there's a picture at externe display...the lenovo logo appears ,the little small circles of win turns...after 20 secondes the internal screen light and all is turn off !..

                    Comment

                    • mcplslg123
                      Badcaps Legend
                      • Jun 2015
                      • 7262
                      • india
                      #6
                      Re: Lenovo g500 issue

                      Originally posted by asem18
                      THank you again for your help..i check it with HDD connected...no backlight , no picture...but there's a picture at externe display...the lenovo logo appears ,the little small circles of win turns...after 20 secondes the internal screen light and all is turn off !..
                      It goes to desktop screen on external with hdd connected??

                        Comment

                        • asem18
                          Senior Member
                          • Oct 2016
                          • 112
                          • my workshop
                          #7
                          Re: Lenovo g500 issue

                          i take some measurements at LVDS1
                          1,2 +LEDVDD = 18.34v
                          7 BKOFF# = 2.6 mv
                          21 +3VS = 3v
                          24 +3VS = 3v
                          26 +3VS_CMOS = 3v

                          i learned from this site that if BKOFF# is not +3v then it is EC problem !

                            Comment

                            • asem18
                              Senior Member
                              • Oct 2016
                              • 112
                              • my workshop
                              #8
                              Re: Lenovo g500 issue

                              yes it goes , but off after 2 minutes !

                                Comment

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