820-3115 no power

Kyle93

Active member
Have a 820-3115 that has green light but wont power on. No liquid damage.

PPBUS_G3H 12.60V
PPBUS_S5_HS_OTHER_INSIS 5V
PP5V_S5 5V
PP5V_SUS 0V and not shorted to ground.

what to check next? Replaced u7940 but no change
 

2informaticos

Administrator
Staff member
Post SMC_ADAPTER_EN, PM_BATLOW_L, PM_SLP_SUS_L.
Are you using original 60/85W charger?
Check all 4 RTC signals if OK.
Also check 32KHz presence at U2600.
 

Kyle93

Active member
SMC_ADAPTER_EN 0V

PM_BATLOW_L 0.18V

PM_SLP_SUS_L 0V

Using bench power supply with original 85W plug. Board using 0.15Amps

RTC_RESET_L 0V

PCH_SRTCRST_L 3.3V

PCH_INTRUDER_L 0v

PCH_INTVRMEN_L 3.3V

Do not have a oscilloscope for checking u2600
 

Kyle93

Active member
changed SMC with different results

r1801 PCH_INTRUDER_L 3.3V PPVRTC_G3H 3.3V

R1803 RTC_RESET_L 3.3V

C1803 RTC_RESET_L 3.3V
 

2informaticos

Administrator
Staff member
"SMC_ADAPTER_EN 0V

PM_BATLOW_L 0.18V

PM_SLP_SUS_L 0V"

Post these again now...

"Also check 32KHz presence at U2600.
-------------
Do not have a oscilloscope..."
Post DC voltage at least...
 

Kyle93

Active member
PCH_DSWVRMEN 3.2V

PM_DSW_PWRGD 0V

3V3_S5 3.3V

S5_PWRGD 0V


RTC_RESET_L 3.3V

PCH_SRTCRST_L 3.3V

PCH_INTRUDER_L 3.055v

PCH_INTVRMEN_L 3.3V
 
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