asus FX804gd novideo after low side mosfet short on CPU phase

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  • ktmmotocross
    Boardkiller
    • Feb 2014
    • 3588
    • slovakia
    #1

    asus FX804gd novideo after low side mosfet short on CPU phase

    Hello.
    I have this asus FX504gd that show novideo after low side mosfet short on CPU phase. after repair laptop start normally, fans ramping by temp, but without video. I have all voltages on coils except VCC GFX phases that must not be active.
    I found that with original bios led for "aircraft mode?" is on, but with new bios this led is not on

    any hint on this? how to check if CPU was damaged?
    Last edited by ktmmotocross; 10-04-2021, 02:13 AM.
    Tags: None
    • RomaM65
      New Member
      • Mar 2020
      • 2
      • Ukraine
      #2
      Re: asus FX804gd novideo after low side mosfet short on CPU phase

      Is there an image on external sources? For example hdmi

      Perhaps what is the supply resistance vcc gfx?

        Comment

        • ktmmotocross
          Boardkiller
          • Feb 2014
          • 3588
          • slovakia
          #3
          Re: asus FX804gd novideo after low side mosfet short on CPU phase

          no internal or external video. no short

            Comment

            • ktmmotocross
              Boardkiller
              • Feb 2014
              • 3588
              • slovakia
              #4
              Re: asus FX804gd novideo after low side mosfet short on CPU phase

              guys nobody knows what to check?

                Comment

                • mcplslg123
                  Badcaps Legend
                  • Jun 2015
                  • 7262
                  • india
                  #5
                  Re: asus FX804gd novideo after low side mosfet short on CPU phase

                  Check if there is any pulse on VCC_GFX with dso only.

                    Comment

                    • ktmmotocross
                      Boardkiller
                      • Feb 2014
                      • 3588
                      • slovakia
                      #6
                      Re: asus FX804gd novideo after low side mosfet short on CPU phase

                      Originally posted by mcplslg123
                      Check if there is any pulse on VCC_GFX with dso only.
                      what is DSO ?

                        Comment

                        • SMDFlea
                          Super Moderator
                          • Jan 2018
                          • 20795
                          • UK
                          #7
                          Re: asus FX804gd novideo after low side mosfet short on CPU phase

                          Originally posted by ktmmotocross
                          what is DSO ?
                          Digital Storage Oscilloscope
                          All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                            Comment

                            • ktmmotocross
                              Boardkiller
                              • Feb 2014
                              • 3588
                              • slovakia
                              #8
                              Re: asus FX804gd novideo after low side mosfet short on CPU phase

                              thats too hard Terminus Technicus for me



                              But i have no pulses on VCC GFX. CPU have only 1ohm which is too low for me. Coils and mosfets on CPU phases gets hot quickly so i think it is burned

                                Comment

                                • ktmmotocross
                                  Boardkiller
                                  • Feb 2014
                                  • 3588
                                  • slovakia
                                  #9
                                  Re: asus FX804gd novideo after low side mosfet short on CPU phase

                                  guys how to flash SIO ITE FX504fd. i dont have this board in my Vertyanov Software.


                                  Or have somebody Vertyanow SW with this board in it?
                                  Last edited by ktmmotocross; 10-08-2021, 04:07 AM.

                                    Comment

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