820-3024-b works with battery but not with charger

hey guys ,

another crazy one to share for advise .


problem =PPBUS_G3H is moving between 2.5 volts to 4 volts . i have checked thoroughly for liquid damage but could not find anything may be under smc but no traces of liquid outside any where . i do get green light some times .

i have tried another dc in board
dc voltage is about 16.15 volts
checked the follwing aswell

1. r7021 and 7022 reaing 20.1 ohms
2. r7051 and r7052 reading 2.9 ohms
3. q7085 replaced
and also have replaced u7000


the system works on battery only .
kindly advise.
 
thanks for the reply
/ resistance between 17/18 is 3.0 ohms and 27/28 is 20.6 BUT r7005 was 166 ohms so removed and replaced with another resistor and now green light is coming every time i plug in the charger but the PPBUS_G3H is fluctuating quicker between 3.96 volts and 4.15 volts .
 
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