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ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

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    ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

    Hello,

    I have a problem with 17" Asus FX705GD ASUS Motherboard marking: FX505GD MB rev 2.0
    I7-8750H with UHD630 and GTX1050.

    Laptop switch in on and go to BIOS without delay.
    Work stable, ventilators switch on late and keep stable temperature.
    It see USB drive. NVME on M2 port and SATA 3 SSD drive.
    RAM, GTX and APU, CPU are visible in BIOS.
    Any try of Windows 10 boot or USB installation are followed in few seconds try of boot (loading circle visible) and then system reboots. This is reapeated multiple times.
    Sometimes it reset during "recovery mode" and sometimes it is possible to go into recovery. Any try of "Windows in safe mode" or other choice occurs in reboots in loop.
    Thanks to SMDFlea i tested few BIOS and my one with cleaned ME. Tested 306 and upgraded 307 version BIOS and all is same.
    There is some power section in BIOS which i didn't touch.
    Tested both on 180W and oem battery with same results. Battery is properly charging.

    Measurments:
    20,6V on power cord

    In BIOS measurements:
    L8201 - 1,04V
    L8800 - 12,6V
    L8300 - 1,22V
    L8101 - 3,45V
    L8100 - 5,15V
    L8004 - 0V - ?
    L8003 - 0V - ?
    L8000 - 0,85V
    L8001 - 0,85V
    L8002 - 0,85V
    L9401 - 0,94V
    L8005 - 0,92V

    HM 370 have approx 50*C

    Switched off:
    L8201 - 1,04V
    L8800 - 1,6V no battery
    L8300 - 0V
    L8101 - 3,45V
    L8100 - 5,15V
    L8004 - 0V
    L8003 - 0V
    L8000 - 0V
    L8001 - 0V
    L8002 - 0V
    L9401 - 0V
    L8005 - 0V

    During reboots:
    L8004 - 0,3V for 1s jump just after restart
    L8003 - 0,33V
    L8000 - 1V before restart, 0,95V just after and then stabilization: 0,85V
    L8001 - as above
    L8002 - as above
    L9401 - stable 0,94 (0V just for few seconds)
    L8005 - 1V peak, then 0,92V stable

    Resistance with all disconnected, just with A slot ram
    L8201 - 25R
    L8800 - 360KR
    L8300 - 75R
    L8101 - 10KR
    L8100 - 25KR
    L8004 -4R
    L8003 - 4R
    L8000 - 1,6R
    L8001 - 1,6R
    L8002 - 1,9R
    L9401 - 30R
    L8005 - 11R

    I found that on MB there is 8 pin keyboard ight/RGB socket, however keyboard have 4pin cable. Looks like palmrest was replaced in past. Maybe someone connected this cable to socket and made some short circuit?
    KBC has very slightly discoloured area near TE letters, so maybe this could be KBC fault?

    Please kindly help in next measurements/tests, as i never diagnose KBC and PCH communication.
    I can borrow oscilloscope, but i never used it for laptop testing, so will need some hints.

    Regards
    Attached Files

    #2
    Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

    Hi
    It is possible that the GTX makes problem while loading Nvidea Treiber

    Comment


      #3
      Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

      I thought that in safe mode it don't switch GTX, but maybe it does.
      Is it possible in this model to switch to UMA only, just for tests?

      Comment


        #4
        Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

        Sometimes the win10 logs can help, have you remove the rtc batt after a bios reprogramming ? about kbc you can check if it's works well with vertyanov (make a backup and erase and power the system after that check if the firmware is present) and adapter (the cable from keyboard is 0.8 and not match directly with vertyanov)

        Comment


          #5
          Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

          During programming RTC battery was took out. I run laptop without battery.
          Don't have KBC programmer - i buy if need already programmed one in store (i repair from time to time, so 100USD is a bit too much for that).
          How to check win10 logs, when it won't switch?
          Put disk into case through USB and check somehow?
          Thanks

          Comment


            #6
            Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

            Try to boot with linux pen drive without m2 or sata.
            Regarding the logs during the installation of windows, search on google, but since it is not easy to interpret them in my opinion it is easier to see the logs during the start phase of a linux distro

            Comment


              #7
              Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

              Sounds like Windows keeps crashing and rebooting itself. If this is with a USB drive, most likely a stop error code caused by a USB I/O error.
              ASRock B550 PG Velocita

              Ryzen 9 "Vermeer" 5900X

              16 GB AData XPG Spectrix D41

              Sapphire Nitro+ Radeon RX 6750 XT

              eVGA Supernova G3 750W

              Western Digital Black SN850 1TB NVMe SSD

              Alienware AW3423DWF OLED




              "¡Me encanta "Me Encanta o Enlistarlo con Hilary Farr!" -Mí mismo

              "There's nothing more unattractive than a chick smoking a cigarette" -Topcat

              "Today's lesson in pissivity comes in the form of a ziplock baggie full of GPU extension brackets & hardware that for the last ~3 years have been on my bench, always in my way, getting moved around constantly....and yesterday I found myself in need of them....and the bastards are now nowhere to be found! Motherfracker!!" -Topcat

              "did I see a chair fly? I think I did! Time for popcorn!" -ratdude747

              Comment


                #8
                Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

                But same crashes and reboots are on Windows preinstalled on M2 and on SATA 3 drive.
                Will try wirh linux. I have peppermint version. This will be ok? Use usb-boot or preinstall?

                Comment


                  #9
                  Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

                  I don't know. I've had a similar problem due to a bad USB drive connection.
                  ASRock B550 PG Velocita

                  Ryzen 9 "Vermeer" 5900X

                  16 GB AData XPG Spectrix D41

                  Sapphire Nitro+ Radeon RX 6750 XT

                  eVGA Supernova G3 750W

                  Western Digital Black SN850 1TB NVMe SSD

                  Alienware AW3423DWF OLED




                  "¡Me encanta "Me Encanta o Enlistarlo con Hilary Farr!" -Mí mismo

                  "There's nothing more unattractive than a chick smoking a cigarette" -Topcat

                  "Today's lesson in pissivity comes in the form of a ziplock baggie full of GPU extension brackets & hardware that for the last ~3 years have been on my bench, always in my way, getting moved around constantly....and yesterday I found myself in need of them....and the bastards are now nowhere to be found! Motherfracker!!" -Topcat

                  "did I see a chair fly? I think I did! Time for popcorn!" -ratdude747

                  Comment


                    #10
                    Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

                    I faced the same situation in another asus and it was SOC which was bad. Replacing it helped. Very difficult to find out what is wrong when technically speaking there is no fault.

                    Comment


                      #11
                      Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

                      Ok so error was same even when not using any USB port? Will check all USB ports and their drives.
                      SOC will be quite expensive. i7-8750H Tries reballing or just replaced?

                      Comment


                        #12
                        Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

                        Originally posted by mcplslg123 View Post
                        I faced the same situation in another asus and it was SOC which was bad. Replacing it helped. Very difficult to find out what is wrong when technically speaking there is no fault.
                        Linux reboots in safe mode, but in normal mode it just stuck during initiation.

                        Did you mean 54B1A (G524B1T11U) as a USB drives?
                        I've checked and all 3 have same resistance.

                        Comment


                          #13
                          Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

                          Try installing win10 21H2 version.

                          Comment


                            #14
                            Re: ASUS FX705GD FX505GD MB REV 2.0 - restarts during boot

                            Same reboots for 21H1 and 21H2

                            Comment

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