acer +vcc_core and No CPU heat

[kokono]

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

[SMDFlea]

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

[mcplslg123]

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.

[piernov]

Re: acer +vcc_core and No CPU heat

Tried to flash the BIOS?

[kokono]

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

But this topic finished without result

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

Tried to flash the BIOS?

If you have a good bios, please send it

[SMDFlea]

Re: acer +vcc_core and No CPU heat

https://www.badcaps.net/forum/showthread.php?t=65552

[kokono]

Re: acer +vcc_core and No CPU heat

https://www.badcaps.net/forum/showthread.php?t=65552

Thx but dont work

[mcplslg123]

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.

[kokono]

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.

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

[piernov]

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.

[kokono]

Re: acer +vcc_core and No CPU heat

Anyone say something to measure?

[Techtiger]

Re: acer +vcc_core and No CPU heat

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 ?

[kokono]

Re: acer +vcc_core and No CPU heat

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

[Techtiger]

Re: acer +vcc_core and No CPU heat

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

[kokono]

Re: acer +vcc_core and No CPU heat

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

[mcplslg123]

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.

[kokono]

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.

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)

[kokono]

Re: acer +vcc_core and No CPU heat

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

[mcplslg123]

Re: acer +vcc_core and No CPU heat

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.

[mcplslg123]

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.