HP 15-AN DAX1BDMB6F0 +VCORE +VCCGT missing

[jasko_jacker]

After a lot of research (Oiginal PID is missing) I find the correct Bios, now all voltage seem corrects but
the cpu voltages +VCCGT -> 0V +VCORE -> 0V are missing. I change two times the NPC81206 with no luck. All related
mosfet are functional (I desolder and test)
On NCP81206 seem that VR_SVID_CLK# = SCLK has 1V but not correctly clock wave
POWER UP SEQUENCE

PLTRST# -> 3.3V
EC_PWROK -> 3.3V
IMVP_PWRGD -> 3.2V
+VCCGT -> 0V
+VCORE -> 0V
VRON -> 3.3V
HWPG -> 3.2V
+1.0V -> OK
+3V +5V +0.65V_DDR_VTT -> OK
MAINON -> 3.3V
+VCCSTPLL ->
+3VSUS -> OK
+1.35VSUS -> OK
SUS_ON -> 3.3V
RSMRST# -> 3.3V
+1.0V_DEEP_SUS -> OK
+1.8V_DEEP_SUS -> OK
+3V_DEEP_SUS -> +3VSPI -> OK
SLP_SUS_ON -> 3.3V
PWR_BTN -> 3.3V
+5VS5 -> OK
+3VS5 -> OK
S5_ON -> 3.3V
RTC_RST# -> OK
SRTC_RST# -> OK
+3V_RTC -> OK

ITE MAIN SIGNAL

3 SUSWARN#_EC -> 3.3V
20 EC_POWEROK -> 3.3V
33 MAINON -> 3.3V
35 SUSON -> 3.3V
73 ADAPTER_SEL_EC -> 1.6V
77 DGPU_PROCHOT# -> 3.3V
79 EC_PCIE_WAKE# -> 3.3V
82 SUSACK#_EC -> 3.3V
83 VRON -> 3.3V
87 DSWROK_EC -> 3.3V
89 SLP_SUS_ON -> 3.3V
90 SLP_SUS#_EC -> 3.3v
93 CLKRUN# -> 0V
97 ACIN -> 3.3V
98 HWPG -> 3.2V
100 S5_ON 3.3V
119 RSMRST# -> 3.3V
123 LID_EC# -> 3.3V
124 H_PROCHOT#_EC 0
128 5VS5_ON -> 3.3V

[caspian]

Re: HP 15-AN DAX1BDMB6F0 +VCORE +VCCGT missing

maybe the CPU is defective. Do you know what had happened to this CPU in the past?

[mcplslg123]

Re: HP 15-AN DAX1BDMB6F0 +VCORE +VCCGT missing

SOC likely to be bad.

[jasko_jacker]

Re: HP 15-AN DAX1BDMB6F0 +VCORE +VCCGT missing

I can't find the wrong signal, now with these cards we would need a jtag debugger.

[dilip.pawar31]

Re: HP 15-AN DAX1BDMB6F0 +VCORE +VCCGT missing

please reflash clear me bios file

[caspian]

Re: HP 15-AN DAX1BDMB6F0 +VCORE +VCCGT missing

As far as I know, JTag works only when CPU has power. Then, we can test CPU through JTag-based testing protocols. when CPU has no power, it does not generate any JTag output. Therefore, Jtag is not useful for power-lack problems. However, it may be used for power management/consumption problems.

[jasko_jacker]

Re: HP 15-AN DAX1BDMB6F0 +VCORE +VCCGT missing

Yes indeed, you are right. I thought there was a possibility of using an external supply.
Regarding this post, I think the problem is that on pin 38 VR_SVID_CLK there should be 1 volt with clock signal but instead I only detect 1V in DC.
I think this signal comes directly from the pch .

[caspian]

Re: HP 15-AN DAX1BDMB6F0 +VCORE +VCCGT missing

I hate soldered CPUs and RAMs. If I was assign to design a mainboard, I would assign sockets for CPU, RAM, PCH, and GPU to be all removable, even though mainboard gets a bit bigger.

[caspian]

Re: HP 15-AN DAX1BDMB6F0 +VCORE +VCCGT missing

I think you should measure voltage on pins 23 to 34 of NCP81206 . what is voltage on PL0004?