acer +vcc_core and No CPU heat

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  • kokono
    Badcaps Veteran
    • Jun 2018
    • 203
    • Germany

    #1

    acer +vcc_core and No CPU heat

    i working in this board, DA0ZRTMB6D0 REV D
    i checked all voltage, is ok except GFX voltage.
    but i dont have video output, i have a good question,
    i checked VCC_Core , is 1.7v but cpu is cold.
    What does it mean? cpu is dead ?

    1 - 0V
    2 - 0V
    3 - 0V
    4 - 1,7V
    5 - 1.06V
    6 - 1,3V
    7 - 5V
    8 - 3,3V
    9 - 1,5V
    10 - 2,7V
    Attached Files
  • SMDFlea
    Super Moderator
    • Jan 2018
    • 20763
    • UK

    #2
    Re: acer +vcc_core and No CPU heat

    Theres another thread with the same problem,maybe it`ll help . https://www.badcaps.net/forum/showthread.php?t=74562
    All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

    Comment

    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india

      #3
      Re: acer +vcc_core and No CPU heat

      1 & 2 is for graphics power and 3 is perhaps PCH Power. One thing is for sure, your graphics chip is not initialised and hence no gfx core(as its discrete mb). You can try removing coils 1 & 2 and see if gfx core comes up.

      Comment

      • piernov
        Super Moderator
        • Jan 2016
        • 4435
        • France

        #4
        Re: acer +vcc_core and No CPU heat

        Tried to flash the BIOS?
        OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • kokono
          Badcaps Veteran
          • Jun 2018
          • 203
          • Germany

          #5
          Re: acer +vcc_core and No CPU heat

          Originally posted by SMDFlea
          Theres another thread with the same problem,maybe it`ll help . https://www.badcaps.net/forum/showthread.php?t=74562
          But this topic finished without result

          Originally posted by mcplslg123
          1 & 2 is for graphics power and 3 is perhaps PCH Power. One thing is for sure, your graphics chip is not initialised and hence no gfx core(as its discrete mb). You can try removing coils 1 & 2 and see if gfx core comes up.
          NO, 1,2 and 3 all is for GFX
          number 3 is 1.5v_GFX

          Originally posted by piernov
          Tried to flash the BIOS?
          If you have a good bios, please send it

          Comment

          • SMDFlea
            Super Moderator
            • Jan 2018
            • 20763
            • UK

            #6
            Re: acer +vcc_core and No CPU heat

            https://www.badcaps.net/forum/showthread.php?t=65552
            All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

            Comment

            • kokono
              Badcaps Veteran
              • Jun 2018
              • 203
              • Germany

              #7
              Re: acer +vcc_core and No CPU heat

              Thx but dont work

              Comment

              • mcplslg123
                Badcaps Legend
                • Jun 2015
                • 7262
                • india

                #8
                Re: acer +vcc_core and No CPU heat

                " NO, 1,2 and 3 all is for GFX "-What do you mean by that?? i already told you coil 1 & 2 is for gfx power and you need to find out why graphics not getting power without which you wont have gfx core enabled on a discrete platform.

                Comment

                • kokono
                  Badcaps Veteran
                  • Jun 2018
                  • 203
                  • Germany

                  #9
                  Re: acer +vcc_core and No CPU heat

                  Originally posted by mcplslg123
                  " NO, 1,2 and 3 all is for GFX "-What do you mean by that?? i already told you coil 1 & 2 is for gfx power and you need to find out why graphics not getting power without which you wont have gfx core enabled on a discrete platform.
                  i attached power states, i have all voltage until +VCCIN( cpu core). next level ist +3v_GFX . i checked DGPU_PWR_EN . is null
                  So i think is normal that dont have GFX core voltage.
                  PCH send DGPU_PWR_EN signal . So I have to draw a conclusion, that PCH dont work ???
                  in addition, i read in another forum that ,in first dont need GFX start
                  In this disc you have 2 graphics, only one will be powered -none +VGPU_CORE in this state is correct.
                  Voltage + 1.5V_GFX appears only during the POST procedure
                  Attached Files

                  Comment

                  • piernov
                    Super Moderator
                    • Jan 2016
                    • 4435
                    • France

                    #10
                    Re: acer +vcc_core and No CPU heat

                    If BIOS doesn't POST, graphics voltage won't come up. Wrote that in the other thread as well.
                    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                    Comment

                    • kokono
                      Badcaps Veteran
                      • Jun 2018
                      • 203
                      • Germany

                      #11
                      Re: acer +vcc_core and No CPU heat

                      Anyone say something to measure?

                      Comment

                      • Techtiger
                        Badcaps Legend
                        • Oct 2014
                        • 1601
                        • france

                        #12
                        Re: acer +vcc_core and No CPU heat

                        Originally posted by kokono
                        i attached power states, i have all voltage until +VCCIN( cpu core). next level ist +3v_GFX . i checked DGPU_PWR_EN . is null
                        So i think is normal that dont have GFX core voltage.
                        PCH send DGPU_PWR_EN signal . So I have to draw a conclusion, that PCH dont work ???
                        in addition, i read in another forum that ,in first dont need GFX start
                        Yes PCH is not responding check SIO pin 78 PCh PWROK ? SYS RESET ? EC PWROK ?
                        Last edited by Techtiger; 08-03-2019, 09:17 AM.

                        Comment

                        • kokono
                          Badcaps Veteran
                          • Jun 2018
                          • 203
                          • Germany

                          #13
                          Re: acer +vcc_core and No CPU heat

                          Originally posted by techtiger
                          Yes PCH is not responding check SIO pin 78 PCh PWROK ?
                          pin 78=3.3v

                          EC PWROK =3.3v
                          SYS RESET is strange
                          please check attach
                          Attached Files
                          Last edited by kokono; 08-03-2019, 09:37 AM.

                          Comment

                          • Techtiger
                            Badcaps Legend
                            • Oct 2014
                            • 1601
                            • france

                            #14
                            Re: acer +vcc_core and No CPU heat

                            Originally posted by kokono
                            pin 78=3.3v
                            what is the resestence to GND on coil 1 2 3 with no voltage did you try to remove one PAD of coil 1 2 to see if voltage is coming back (mcplslg123) have ask you ! may be a BIOS with out Oscilloscope it's hard to say
                            Last edited by Techtiger; 08-03-2019, 09:39 AM.

                            Comment

                            • kokono
                              Badcaps Veteran
                              • Jun 2018
                              • 203
                              • Germany

                              #15
                              Re: acer +vcc_core and No CPU heat

                              Originally posted by techtiger
                              what is the resestence to GND on coil 1 2 3 with no voltage did you try to remove one PAD of coil 1 2 to see if voltage is coming back (mcplslg123) have ask you !
                              1,2 ist about 13ohm
                              and 3 is 9 ohm
                              i dont try because before these voltage ,we should have +3V_GFX ,But is null
                              Attached Files
                              Last edited by kokono; 08-03-2019, 09:42 AM.

                              Comment

                              • mcplslg123
                                Badcaps Legend
                                • Jun 2015
                                • 7262
                                • india

                                #16
                                Re: acer +vcc_core and No CPU heat

                                i asked you to remove coil 1 &2 'coz of this very reason that you wont have +3v gfx. It might be so 'coz of bad graphics chip also. Thats why asked you to avoid graphics power circuit by removing those 2 coils and see if anything changes. have seen , that on many-many discrete mobo's. Btw, its your choice.

                                Comment

                                • kokono
                                  Badcaps Veteran
                                  • Jun 2018
                                  • 203
                                  • Germany

                                  #17
                                  Re: acer +vcc_core and No CPU heat

                                  Originally posted by mcplslg123
                                  i asked you to remove coil 1 &2 'coz of this very reason that you wont have +3v gfx. It might be so 'coz of bad graphics chip also. Thats why asked you to avoid graphics power circuit by removing those 2 coils and see if anything changes. have seen , that on many-many discrete mobo's. Btw, its your choice.
                                  Thx for suggestion,i tested another things
                                  i pullup "DGPU_PWR_EN" with R620 ,and now i have 1.5v in PL10(Coil 3) and about 0.9v in PL6 and PL7(Coil 1&2) , and Graphic chip Warmed up .So i think chip graphic and all voltage for chip is ok and working.
                                  But this job is for PCH , maybe i have a short smd resistor or PCH integrated dont answer
                                  it is strange, Coil4 have 1.7 volt but cpu not warm(very low)
                                  Attached Files
                                  Last edited by kokono; 08-04-2019, 05:06 AM.

                                  Comment

                                  • kokono
                                    Badcaps Veteran
                                    • Jun 2018
                                    • 203
                                    • Germany

                                    #18
                                    Re: acer +vcc_core and No CPU heat

                                    Also i checked SYS_PWROK is 3v
                                    So EC_PWROK and IMVP_PWRGD_3V is 3v
                                    Attached Files

                                    Comment

                                    • mcplslg123
                                      Badcaps Legend
                                      • Jun 2015
                                      • 7262
                                      • india

                                      #19
                                      Re: acer +vcc_core and No CPU heat

                                      Originally posted by kokono
                                      Thx for suggestion,i tested another things
                                      i pullup "DGPU_PWR_EN" with R620 ,and now i have 1.5v in PL10(Coil 3) and about 0.9v in PL6 and PL7(Coil 1&2) , and Graphic chip Warmed up .So i think chip graphic and all voltage for chip is ok and working.
                                      But this job is for PCH , maybe i have a short smd resistor or PCH integrated dont answer
                                      it is strange, Coil4 have 1.7 volt but cpu not warm(very low)
                                      Yes, that proves graphics chip is fine.

                                      Comment

                                      • mcplslg123
                                        Badcaps Legend
                                        • Jun 2015
                                        • 7262
                                        • india

                                        #20
                                        Re: acer +vcc_core and No CPU heat

                                        I still suspect bios issue. Have you tried this bios
                                        https://www.laboneinside.com/acer-as...ev-d-bios-bin/

                                        This bios is tested ok.

                                        Comment

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