820-00165-A No life

I have a 820-00165-A board, no power. Slight corrosion on C6100 which was cleaned up. No other signs of damage or corrosion.

ppbus_g3h is 8.59
pp_3v42 is 3.44
pp3v3_sus is 3.3
 

2informaticos

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Staff member
Then must be PCH related problem.
Check SMC_ADAPTER_EN, PM_DSW_PWRGD, PCH_DSWVRMEN, PM_BATLOW_L and all PCH's RTC signals.
 
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SMC_ADAPTER_EN is 3.4
PM_DSW_PWRGD is 3.44
PCH_DSWVRMEN is 3.2
PM_BATLOW_L is .245

PCH_CLK32K_RTCX is .411
PCH_INTRUDER_L is 3.06
PCH_INTVRMEN is 3.34
PCH_SRTCRST_L is 3.34
RTC_RESET_L is 3.34
 

2informaticos

Administrator
Staff member
"PM_BATLOW_L is .245"
PCH requires high level to start power on sequence.
Using 45W original Magsafe 2 charger?
Try 60/85W too.
Also try to start with both charger and battery connected.
 
I am using an original 85W charger.

W/ battery&charger connected PM_BATLOW_L is .156v
reading in diode is .49 (with no battery)
 
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not getting any fan spin. r1410 is only reading 7.7k ohms. i took the resistor off and it read 10ohm. I replaced it for fun but went back down to 7.7ohms and still no fan spin.

should i change q3000 and smc to fix maybe?
 

2informaticos

Administrator
Staff member
You can remove Q3000 and check PM_BATLOW_L.
I doubt to be fault.
You may need to change SMC; reball it first.
 
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