820-01700 quarter fan spin?

ajdoc

Member
Liquid damage around Q5480.

Damaged components replaced. Traces are OK,

No chime.
20V on charger and it take 2.2A short but fast fan spin and reboot.
Trackpad clicks, caps lock LED not working.

Any idea?
 

ajdoc

Member
PPBUS_G3H got 12.6V but there is drop to around 10V during that short fan spin and then again stable 12.6V

PP1V2_AWAKE 1.2V and when fan spin drop to 0V and then back to 1.2V
PP1V8_AWAKE 1.8V and when fan spin drop to 0V and then back to 1.8V

PP1V8_SLPS2R present
P1V1SLPS2R_SW0 present
PP0V8_SLPS2R present
 

ajdoc

Member
I connected battery and got 20.1V and 0.06A from charger which is around 1.2W.

After 15 minutes USB C meter shows there was 14mAh "used"

PPVBAT_G3H_CONN have a few second 12.6V and then a few seconds 0.16V
 

2informaticos

Administrator
Staff member
Does the board try to start when battery is connected?
Try using SWK000/2 pads, instead of power button.
 

2informaticos

Administrator
Staff member
Trackpad click is irrelevant.
Is an hardware response, once its coils are energized.
Do not consider the click as life sign.

I was expecting you will check for reaction on S5 voltages, or S4 signal.
 

ajdoc

Member
"Do not consider the click as life sign." - thank you , will remember that


PP3V3_S5 - 0V
PP1V8_S5 - 0V
PP5V_S5_LDO - 5.13V
PP5V_S4_T_USBC - 0V
PP5V_S4_X_USBC - 0V

Will that help?
 
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