820-00165 A1466 No battery

[pipsystems]

Board powers on and boots fine with charger, known good batteries display 0%, dies, and it does not charge.

Corrosion around C1204, and U6101 area

I tested the continuity on U6101 and all the connections seem to be fine still

 

[2informaticos]

Post exact PPBUS_G3H voltage, w/ and w/o battery connected.
Also check voltage and diode mode to ground at SCL/SDA lines of battery bus.

 

[pipsystems]

PPBUS_G3H:
8.62 V - Just Charger
1.8 V and dropping steadily - Just battery
5.99V - Bat & Charger

I'm sorry but I couldn't find the SCL and SDA lines related to the battery
Note: Sometimes the fan does spin fast and sometimes doesn't
This is what I did find related to the battery:

Just the charger connected:

Name	Voltage	Diode ( disconnected from power and red to ground)
CHGR_VNEG_R	1.43V	2.67V
PPBAT_R	8.6V	0.152V
PPBAT_CONN	8.6V	OL
TBT_BATLOW	3.3V	0.806V
PM_BATLOW	3.3V	0.5V & Rising

Just Battery Connected:

Name	Voltage
CHGR_VNEG_R	5mV
PPBAT_R	1.6V
PPBAT_CONN	1.6V
TBT_BATLOW	15mV
PM_BATLOW	37mV

Battery and Charger Connected:

Name	Voltage
CHGR_VNEG_R	0.98V
PPBAT_R	5.95V
PPBAT_CONN	5.9V ( Rising)
TBT_BATLOW	3.3V
PM_BATLOW	3.3V

 

[2informaticos]

Looks like battery is charging.
Let it connected more time and voltage should increase more than 6-7V ("5.9V ( Rising)").

"I'm sorry but I couldn't find the SCL and SDA lines related to the battery"
No idea, looking at battery conector in schematic???
These values should be good, as PPBUS_G3H is correctly controlled.

There should be bad battery, or broken connector.