Hp g61 main da00p6mb6d0 no power switch

[reset1986]

I have this hp that when I insert the power supply the charger light is ok, when I press the button nothing happens both with charger and with battery

I checked the mainboard and ran these procedures without success:

Flash with bios replacement

replacement ene kb3926

slight reflow on the ICH-9M

voltages present
3VALW + / + 5VALW
+ 12VALW

NBSWON1 # 3.3v drops to 0 when I press the power button

Nothing happens no fan speed,

Do you have any suggestions on what to check? I attach bios and scheme

any suggestion is well accepted thanks

[mcplslg123]

Re: Hp g61 main da00p6mb6d0 no power switch

check RSMRST,LID SW on kbc ene 3926(Both should be 3V). Why change random components without troubleshooting first??

[Techtiger]

Re: Hp g61 main da00p6mb6d0 no power switch

Check if the adapter is Recognize by the SIO AD_TYPE pin 64

[reset1986]

Re: Hp g61 main da00p6mb6d0 no power switch

check RSMRST,LID SW on kbc ene 3926(Both should be 3V). Why change random components without troubleshooting first??

you're right, I had the same components and I tried without success
measure yourself now

RSMRST 3.35 v
LID_EC 3.35 v

they seem ok, the pc doesn't want to turn on

[reset1986]

Re: Hp g61 main da00p6mb6d0 no power switch

Check if the adapter is Recognize by the SIO AD_TYPE pin 64

hi, measured
pin 64 SIO AD_TYPE 1.15 v
Does the measure seem ok?

[mcplslg123]

Re: Hp g61 main da00p6mb6d0 no power switch

Yes, all seems right. Your mb is with discrete graphics or UMA??

[reset1986]

Re: Hp g61 main da00p6mb6d0 no power switch

Yes, all seems right. Your mb is with discrete graphics or UMA??

graphics motherboard UMA, nortbridge CANTIGA_GM

[SMDFlea]

Re: Hp g61 main da00p6mb6d0 no power switch

Your bios backup should be posted in the "Bios Requests ONLY!" sub forum if you want it looking at /fixing https://www.badcaps.net/forum/forumdisplay.php?f=40

[mcplslg123]

Re: Hp g61 main da00p6mb6d0 no power switch

Make a bios request in bios subforum as suggested by@ smdflea. Seems like bios issue.

[reset1986]

Re: Hp g61 main da00p6mb6d0 no power switch

Make a bios request in bios subforum as suggested by@ smdflea. Seems like bios issue.

uploaded original backup in the bios section

[reset1986]

Re: Hp g61 main da00p6mb6d0 no power switch

uploaded original backup in the bios section

Your bios backup should be posted in the "Bios Requests ONLY!" sub forum if you want it looking at /fixing https://www.badcaps.net/forum/forumdisplay.php?f=40

ok, I have opened a new discussion in the bios section, thanks

[reset1986]

Re: Hp g61 main da00p6mb6d0 no power switch

I rewrote the bios, even with the original file from the hp site, nothing to do, always off,
Is it possible that the ICH-9M chipset has failed?
or the CANTIGA_GM nortbridge?

[Techtiger]

Re: Hp g61 main da00p6mb6d0 no power switch

check out page 37 & conform +5VSUS +3VSUS & what voltage are missing on all Big gray Coils when you peers the PWBT

[reset1986]

Re: Hp g61 main da00p6mb6d0 no power switch

check out page 37 & conform +5VSUS +3VSUS & what voltage are missing on all Big gray Coils when you peers the PWBT

+ 5VSUS 0V + 3VSUS 0V

There is no reaction to switch on the main by pressing the pwbt

[lapfix]

Re: Hp g61 main da00p6mb6d0 no power switch

+ 5VSUS 0V + 3VSUS 0V

voltage measurments of PQ 57 / PQ 2

Use diode mode on multimeter to take the impedance on all pins of PQ57/PQ2 ( D-G-S )

[mcplslg123]

Re: Hp g61 main da00p6mb6d0 no power switch

S5_ON-pin 101 of KBc needs to be checked . I think this voltage is not rising. Since you have RSMTST, that means comminication is ok between kbc and ICH. After RSMRST, ICH should answer by releasing S5_ON without which you wont have SUS and in turn VS lines will not rise.

[piernov]

Re: Hp g61 main da00p6mb6d0 no power switch

S5_ON is managed by the EC itself to turn on S5 rails, that should happen before RSMRST# goes high.

When RSMRST# is high and DNBSWON# is triggered, ICH should transition to S4 then S3 state by sending out SLP_S5# and SLP_S4# (SUSC#), EC gets those signals and sends out SUSON to turn on the SUS rails (which are S3 rails, not to be mixed up with the SUS rails present on newer platforms with Deep Sx state).
This requires RTC well to be already working, so RTCRST#, SRTCRST#, INTVRMEN, 32KHz RTC clock should all be present. BATLOW# most likely has to be high as well.

[reset1986]

Re: Hp g61 main da00p6mb6d0 no power switch

+ 5VSUS 0V + 3VSUS 0V

voltage measurments of PQ 57 / PQ 2

Use diode mode on multimeter to take the impedance on all pins of PQ57/PQ2 ( D-G-S )

replaced PQ 57 / PQ 2 the problem still remains

[reset1986]

Re: Hp g61 main da00p6mb6d0 no power switch

S5_ON-pin 101 of KBc needs to be checked . I think this voltage is not rising. Since you have RSMTST, that means comminication is ok between kbc and ICH. After RSMRST, ICH should answer by releasing S5_ON without which you wont have SUS and in turn VS lines will not rise.

s5 on and RSMRST are released after pressing the pw button, I measure

S5on 3.35,
RSMRST 3.35v

however there are no lines Vs

without pressing the pw button

S5on 0 v,
RSMRST 0 v

Must RSMRST always be present?

[reset1986]

Re: Hp g61 main da00p6mb6d0 no power switch

S5_ON is managed by the EC itself to turn on S5 rails, that should happen before RSMRST# goes high.

When RSMRST# is high and DNBSWON# is triggered, ICH should transition to S4 then S3 state by sending out SLP_S5# and SLP_S4# (SUSC#), EC gets those signals and sends out SUSON to turn on the SUS rails (which are S3 rails, not to be mixed up with the SUS rails present on newer platforms with Deep Sx state).
This requires RTC well to be already working, so RTCRST#, SRTCRST#, INTVRMEN, 32KHz RTC clock should all be present. BATLOW# most likely has to be high as well.

DNBSWON # is activated
I measure
DNBSWON # 3.35V


RTC_RST# 0v
SLP_S5# 0V
SUSB# 0V
SUSON 0V the problem is here

replace ICH-9M?