820-3115 Green light but ?not turn on

[Dewanbd]

820-3115 Green light but not turn on.
It was working unit i just changed hinges cover after that not turn on, only green light.
PPBUS_G3H=12.57v
Not turn on with a charged battery.
PP3V42-GH=3.49V
3v3_S5=3.29v
PP5V_S5=5v
PPVIN_SW_T29BST=2.5v
Any help please.

 

[2informaticos]

Post SMC_ADAPTER_EN, PM_BATLOW_L, PM_SLP_SUS_L, 3V3_SUS.
Trigger SMC_ONOFF_L and check any reaction at PM_PWRBTN_L.
Does it start in SMC bypass mode?

 

[Dewanbd]

SMC_ADAPTER_EN=3.46v
PM_BATLOW_L=unable to measured.
3V3_SUS=3.3v
SMC_ONOFF_L=3.48v
PM_PWRBTN_L=3.47v
Start in SMC bypass mode , i dont know how to do this check, could you please
show me how to do that checking?
Thanks.

 

[2informaticos]

"Start in SMC bypass mode , i dont know how to do this check, could you please
show me how to do that checking?"

Google knows that for sure.
Learn to use online tools and you gain time.

Press power button, connect charger and maintain pressing 5-10s...

PM_BATLOW_L is available at Q5040.

 

[Dewanbd]

PM_BATLOW_L=3.24v
yes ,start in SMC bypass mode

 

[2informaticos]

So you have a sensor issue.
Post voltage at pins 9 & 15 of U7000, charger and battery connected.
Be sure R7021/22 and R7051/52 have correct value.

 

[Dewanbd]

Voltage at U7000, charger and battery connected.
pins 9= .47v
pin15=.048v

R7021/22=16.42v both, 10 ohm both.
R7051/52=11.91v both, 2.4 ohm,.2 ohm respectively.

 

[2informaticos]

Post now voltage for SMC_DCIN_VSENSE and SMC_PBUS_VSENSE.

 

[Dewanbd]

SMC_DCIN_VSENSE=2.08v
SMC_PBUS_VSENSE=1.45v

 

[2informaticos]

Post the signals on charger mode only, without battery.

"Trigger SMC_ONOFF_L and check any reaction at PM_PWRBTN_L."
???
Check for ripped off componentes...

 

[Dewanbd]

charger mode only:
SMC_DCIN_VSENSE=2.08v
SMC_PBUS_VSENSE=1.45v

Trigger SMC_ONOFF_L and check any reaction at PM_PWRBTN_L."
how to do this checking?
I could not find any missing components.
Thanks.

 

[2informaticos]

"how to do this checking?"
Use R5015/16 pads for that...

 

[Dewanbd]

"Trigger SMC_ONOFF_L " it means short R5015/16 pins and check the V at PM_PWRBTN_L.?

 

[2informaticos]

Yes, you must see a drop pulse there.
Solder a wire on SMC_ONOFF_L and touch the ground with it...

 

[Dewanbd]

I found 350 mv at PM_PWRBTN_L after Solder a wire on SMC_ONOFF_L. I dont have ocps so use Fluke 114 True rms.

 

[2informaticos]

Just touch the ground for a moment, like pressing power button.
PM_PWRBTN_L must drop and go back to high level instantly.

 

[Dewanbd]

Just touch the ground for a moment, like pressing power button.
PM_PWRBTN_L must drop and go back to high level instantly.
## I found PM_PWRBTN_L OL and when touch the ground it goes up quickly 373 mv and drop 353mv very fast.

 

[2informaticos]

So you never get 3V at PM_PWRBTN_L?
It should stay high all time.
Only drops if SMC_ONOFF_L is triggered.

 

[Dewanbd]

I made a mistake ( measured it before in mv). After right measurement i found 3V at PM_PWRBTN_L , all times and drop it 0.353v ( stable) if SMC_ONOFF_L is triggered.

 

[2informaticos]

Check if PM_SLP_S4_L pulses at the same moment.