Hello to everyone,
I have this malfunctioning board that shuts down in exactly 4 seconds.
The owner told me that the system started acting weird because one day it didn't start well after pressing power
button, but he had to press it again two or 3 times, then all the other functions were working (loading Win 8 etc).
This behaviour got worse by time, and then he had to try 5-6 times pressing power button in order to start the machine.
Once arrived in my hands, the machine started at first try...
Then i tried several times to shut it off and on and it started acting bad again...after some 20 tries the system didn't start anymore.
The owner told me also that it has never been dropped nor any liquid spilled inside, and I can confirm because the mainboard pcb is not corroded anywhere and has no angle or aestethic damages.
I started to measures voltages, and found firstly that +3VSUS_SPI was cycling, up and down, from 3.26V to 1.75V , in a circle of 5 seconds.
I then heated softly the mainboard in various places (CPU, GPU, soldered RAM chips, power ICs, and all over), tring to start it after each heating, but nothing changed.
Then I unsoldered BIOS chip in order to reprogram it, and I noticed that +3VSUS_SPI (and many other signals) was stable at 3.26V...
So I decided to start with reprogramming the BIOS chip, I put the same original version 209, taken from Asus support site, but anything changed.
So I took off again BIOS chip and inserted a newer 212 one, but again the same behaviour.
Then I took some extensive measures :
Without bios chip
+3VAO 3.26
+5VAO 5.00
+3VA 3.26
+5VA 5.01
+12VSUS 12.11
PS_ON 3.26
+3VSUS_ON 2.96
VRAM 1.36V
VTTL 0.68V
PL8201 1.08V
Impedances measured with red probe to GND:
PU8800 BQ735 (impedance - without BIOSCHIP - with 212 BIOSCHIP - only BATT - BATT+PWRJK)
1 ACN 483 - 18.92 - 18.93 - 11.55 - 18.93
2 ACP 483 - 18.92 - 18.93 - 11.55 - 18.93
3 CMSRC 658 - 18.32 - 18.38 - 0.00 - 18.18
4 ACDRV 723 - 23.8 - 23.7 - 0.00 - 23.5
5 ACOK 468 - 3.00 - 3.01 - 0.00 - 2.95
6 ACDET 741 - 2.57 - 2.57 - 0.00 - 2.56
7 IOUT 524 - 0.00 - 0.00 - 0.00 - 0.24
8 SDA 456 - 3.26 - 3.26 - 0.00 - 3.26
9 SCL 455 - 3.26 - 3.26 - 0.00 - 3.26
10 ILIM 536 - 0.81 - 0.81 - 0.81 - 0.81
11 BATDRV 724 - 2.51 - 12.36 - 17.60 - 12.36
12 SRN 504 - 2.49 - 12.36 - 11.55 - 12.38
13 SRP 506 - 2.49 - 12.38 - 11.55 - 12.38
14 GND 000 - 0.00 - 0.00 - 0.00 - 0.00
15 LODRV 333 - 0.00 - 0.08 - 0.00 - 1.74
16 REGN 509 - 5.84 - 5.84 - 0.07 - 5.83
17 BTST 595 - 5.70 - 18.79 - 11.26 - 20.00
18 HIDRV 1000 - 2.50 - 14.19 - 11.54 - +20.00
19 PHASE 495 - 2.50 - 13.69 - 11.54 - 18.83
20 VCC 618 - 18.68 - 18.64 - 11.39 - 18.83
PU8101 RT8239B (Impedance - pwrjack)
1 FB1 595 - 2.00
2 ENTRIP1 599 - 2.42
3 TON 608 - 1.88
4 ENTRIP2 599 - 2.46
5 FB2 599 - 2.01
6 PGOOD2 673 - 3.32
7 BOOT2 617 - 8.23
8 UGATE2 791 - 3.32
9 PHASE2 439 - 3.27
10 LGATE2 429 - 0.16
11 VIN 487 - 18.88
12 ENLDO 740 - 18.20
13 SECFB 608 - 1.97
14 LDO5 532 - 5.01
15 LDO3 468 - 3.26
16 LGATE1 427 - 0.14
17 PHASE1 487 - 5.02
18 UGATE1 820 - 5.04
19 BOOT1 618 - 9.93
20 BYP1 418 - 5.01
(before pwrbtn - after pwrbtn)
D2501 ALL_SYSTES_PWRGD 0.00 - 3 sec and off
Q7702 DGPU_PWRON 0.28-2.95-0.33-0.28
R0405 DRAMRST# 0.12-1.36
R2525 DSWODVREN 3.15
D3204 Q3204 EC_RST# 3.23
R2004 GPU_RST# 0.28-3.23-0.38-0.28
R3211 GPU_THERM# 0.28-3.23-0.38-0.28
R0823 H_CPUPWRGD_R 0.00 - 1.03 (H_CPUPWRGD N.C.), off in 3 sec
R2101 H_THRMTRIP# 0.00 - 1.03 off in 3s
R3008 LID_SW# 3.26
D2505 ME_AC_PRESENT 0.00 -> in 3sec grows to 3.26(1sec then goes to 0.00), in a continuous cycle
R2529 ME_SUSPWRDNACK_R 3.26 for 3 sec -> goes down till 1.75 for 2 sec -> 3.26, in a continuous cycle
R2531 PCH_DPWROK 3.26
R2217 PCH_INTVRMEN 0.00
R2514 PCH_SLP_S0# 3.26 for 3 sec -> goes down till 1.75 for 2 sec -> 3.26, in a continuous cycle
SLP_S3_R#
R2551 PLT_RST# 0.00 - 3.23, after 3sec 0.00
R2521 PM_PWRBTN#_R 3.26 (goes to 0.00 forn a moment after pressing pwrbtn)
R3005 -> R2537 PM_PWROK 0.00 - 3.26, after 3sec 0.00
R3001 PM_RSMRST# 3.26 for 1 sec -> goes down till 2.11 for 3 sec -> 3.26, in a continuous cycle
D2502
pin1 PM_RSMRST#_PCH 3.26 for 2 sec -> goes down till 2.11 for 2 sec -> 3.26, in a continuous cycle
pin2 PM_SYSPWROK_PCH 0.00 - 3.23
pin3 3VA_DSW_PWRGD 3.26
R2511 PM_SLP_A# 0.00 - 3.26, after 3sec 0.00
R3018 PM_SLP_SUS# 3.26
RN3002 PM_SUSB# 0.00 - 3.26, after 3sec 0.00 = SLP_S3_R#
RN3002 PM_SUSC# 0.00 - 3.26, after 3sec 0.00
R2540 PM_SYSPWROK 0.00 - 3.26, after 3sec 0.00
R2528 PM_SYSRST_R# 0.00 - 3.26, after 3sec 0.00
R3047 PWR_SW# 3.26 goes to zero when pressed - 3.26
R3048 PS_ON 3.26
R2246 RTC_RST# 3.16
T2501 SLP_S5# 0.96
R2222 SM_INTRUDER# 2.86
R2226 SRTC_RST# 3.16
R3026 R2510 SUS_PWR_ACK 3.26 for 1 sec -> goes down till 0.00 for 3 sec -> 3.26, in a continuous cycle
PQ9107 SUSB_EC#
1 GND 0.00
2 0.00 - 3.26, off in 3 sec
3 +12VS 0.00 - 12.00, off in 3 sec
4 12.00
5-6 12.00 -> 0.00
PQ9105 SUSC_EC# 0.00 - 3.26, off in 3 sec
PR9022 VGA_ALERT# 0.00 - 3.23, off in 3 sec
All pins on keyboard connector have 3.25Volt.
Battery charges ok and keeps the charge , you can start the system without power jack (only battery), but the behaviour is the same).
Front LED pattern is like this:
- press pwrbtn -> pwr led (LED5608) + capslock (LED5607) light up
- after 3 seconds, only capslock led shuts down
- after another 1 second , power led shuts down
Do you think that a modified BIOS with a Clean ME could help?
In a complete ambient silence, after inserting powerjack and waited for the initial sequence to end, I can hear a squeaky sound , cycling 3 times per second, from the KBC (IT8585VG) zone...that sound ends when I press the power button, and restarts again when the system shuts down...
Do you think that IT8585VG can be at fault?
Please, can you suggest something?
I have this malfunctioning board that shuts down in exactly 4 seconds.
The owner told me that the system started acting weird because one day it didn't start well after pressing power
button, but he had to press it again two or 3 times, then all the other functions were working (loading Win 8 etc).
This behaviour got worse by time, and then he had to try 5-6 times pressing power button in order to start the machine.
Once arrived in my hands, the machine started at first try...
Then i tried several times to shut it off and on and it started acting bad again...after some 20 tries the system didn't start anymore.
The owner told me also that it has never been dropped nor any liquid spilled inside, and I can confirm because the mainboard pcb is not corroded anywhere and has no angle or aestethic damages.
I started to measures voltages, and found firstly that +3VSUS_SPI was cycling, up and down, from 3.26V to 1.75V , in a circle of 5 seconds.
I then heated softly the mainboard in various places (CPU, GPU, soldered RAM chips, power ICs, and all over), tring to start it after each heating, but nothing changed.
Then I unsoldered BIOS chip in order to reprogram it, and I noticed that +3VSUS_SPI (and many other signals) was stable at 3.26V...
So I decided to start with reprogramming the BIOS chip, I put the same original version 209, taken from Asus support site, but anything changed.
So I took off again BIOS chip and inserted a newer 212 one, but again the same behaviour.
Then I took some extensive measures :
Without bios chip
+3VAO 3.26
+5VAO 5.00
+3VA 3.26
+5VA 5.01
+12VSUS 12.11
PS_ON 3.26
+3VSUS_ON 2.96
VRAM 1.36V
VTTL 0.68V
PL8201 1.08V
Impedances measured with red probe to GND:
PU8800 BQ735 (impedance - without BIOSCHIP - with 212 BIOSCHIP - only BATT - BATT+PWRJK)
1 ACN 483 - 18.92 - 18.93 - 11.55 - 18.93
2 ACP 483 - 18.92 - 18.93 - 11.55 - 18.93
3 CMSRC 658 - 18.32 - 18.38 - 0.00 - 18.18
4 ACDRV 723 - 23.8 - 23.7 - 0.00 - 23.5
5 ACOK 468 - 3.00 - 3.01 - 0.00 - 2.95
6 ACDET 741 - 2.57 - 2.57 - 0.00 - 2.56
7 IOUT 524 - 0.00 - 0.00 - 0.00 - 0.24
8 SDA 456 - 3.26 - 3.26 - 0.00 - 3.26
9 SCL 455 - 3.26 - 3.26 - 0.00 - 3.26
10 ILIM 536 - 0.81 - 0.81 - 0.81 - 0.81
11 BATDRV 724 - 2.51 - 12.36 - 17.60 - 12.36
12 SRN 504 - 2.49 - 12.36 - 11.55 - 12.38
13 SRP 506 - 2.49 - 12.38 - 11.55 - 12.38
14 GND 000 - 0.00 - 0.00 - 0.00 - 0.00
15 LODRV 333 - 0.00 - 0.08 - 0.00 - 1.74
16 REGN 509 - 5.84 - 5.84 - 0.07 - 5.83
17 BTST 595 - 5.70 - 18.79 - 11.26 - 20.00
18 HIDRV 1000 - 2.50 - 14.19 - 11.54 - +20.00
19 PHASE 495 - 2.50 - 13.69 - 11.54 - 18.83
20 VCC 618 - 18.68 - 18.64 - 11.39 - 18.83
PU8101 RT8239B (Impedance - pwrjack)
1 FB1 595 - 2.00
2 ENTRIP1 599 - 2.42
3 TON 608 - 1.88
4 ENTRIP2 599 - 2.46
5 FB2 599 - 2.01
6 PGOOD2 673 - 3.32
7 BOOT2 617 - 8.23
8 UGATE2 791 - 3.32
9 PHASE2 439 - 3.27
10 LGATE2 429 - 0.16
11 VIN 487 - 18.88
12 ENLDO 740 - 18.20
13 SECFB 608 - 1.97
14 LDO5 532 - 5.01
15 LDO3 468 - 3.26
16 LGATE1 427 - 0.14
17 PHASE1 487 - 5.02
18 UGATE1 820 - 5.04
19 BOOT1 618 - 9.93
20 BYP1 418 - 5.01
(before pwrbtn - after pwrbtn)
D2501 ALL_SYSTES_PWRGD 0.00 - 3 sec and off
Q7702 DGPU_PWRON 0.28-2.95-0.33-0.28
R0405 DRAMRST# 0.12-1.36
R2525 DSWODVREN 3.15
D3204 Q3204 EC_RST# 3.23
R2004 GPU_RST# 0.28-3.23-0.38-0.28
R3211 GPU_THERM# 0.28-3.23-0.38-0.28
R0823 H_CPUPWRGD_R 0.00 - 1.03 (H_CPUPWRGD N.C.), off in 3 sec
R2101 H_THRMTRIP# 0.00 - 1.03 off in 3s
R3008 LID_SW# 3.26
D2505 ME_AC_PRESENT 0.00 -> in 3sec grows to 3.26(1sec then goes to 0.00), in a continuous cycle
R2529 ME_SUSPWRDNACK_R 3.26 for 3 sec -> goes down till 1.75 for 2 sec -> 3.26, in a continuous cycle
R2531 PCH_DPWROK 3.26
R2217 PCH_INTVRMEN 0.00
R2514 PCH_SLP_S0# 3.26 for 3 sec -> goes down till 1.75 for 2 sec -> 3.26, in a continuous cycle
SLP_S3_R#
R2551 PLT_RST# 0.00 - 3.23, after 3sec 0.00
R2521 PM_PWRBTN#_R 3.26 (goes to 0.00 forn a moment after pressing pwrbtn)
R3005 -> R2537 PM_PWROK 0.00 - 3.26, after 3sec 0.00
R3001 PM_RSMRST# 3.26 for 1 sec -> goes down till 2.11 for 3 sec -> 3.26, in a continuous cycle
D2502
pin1 PM_RSMRST#_PCH 3.26 for 2 sec -> goes down till 2.11 for 2 sec -> 3.26, in a continuous cycle
pin2 PM_SYSPWROK_PCH 0.00 - 3.23
pin3 3VA_DSW_PWRGD 3.26
R2511 PM_SLP_A# 0.00 - 3.26, after 3sec 0.00
R3018 PM_SLP_SUS# 3.26
RN3002 PM_SUSB# 0.00 - 3.26, after 3sec 0.00 = SLP_S3_R#
RN3002 PM_SUSC# 0.00 - 3.26, after 3sec 0.00
R2540 PM_SYSPWROK 0.00 - 3.26, after 3sec 0.00
R2528 PM_SYSRST_R# 0.00 - 3.26, after 3sec 0.00
R3047 PWR_SW# 3.26 goes to zero when pressed - 3.26
R3048 PS_ON 3.26
R2246 RTC_RST# 3.16
T2501 SLP_S5# 0.96
R2222 SM_INTRUDER# 2.86
R2226 SRTC_RST# 3.16
R3026 R2510 SUS_PWR_ACK 3.26 for 1 sec -> goes down till 0.00 for 3 sec -> 3.26, in a continuous cycle
PQ9107 SUSB_EC#
1 GND 0.00
2 0.00 - 3.26, off in 3 sec
3 +12VS 0.00 - 12.00, off in 3 sec
4 12.00
5-6 12.00 -> 0.00
PQ9105 SUSC_EC# 0.00 - 3.26, off in 3 sec
PR9022 VGA_ALERT# 0.00 - 3.23, off in 3 sec
All pins on keyboard connector have 3.25Volt.
Battery charges ok and keeps the charge , you can start the system without power jack (only battery), but the behaviour is the same).
Front LED pattern is like this:
- press pwrbtn -> pwr led (LED5608) + capslock (LED5607) light up
- after 3 seconds, only capslock led shuts down
- after another 1 second , power led shuts down
Do you think that a modified BIOS with a Clean ME could help?
In a complete ambient silence, after inserting powerjack and waited for the initial sequence to end, I can hear a squeaky sound , cycling 3 times per second, from the KBC (IT8585VG) zone...that sound ends when I press the power button, and restarts again when the system shuts down...
Do you think that IT8585VG can be at fault?
Please, can you suggest something?
