A2338 battery don't charge

[zippylin]

model: A2338, I got a problem with battery don't charge, the BGATE(B3) of U5200 is 12V with battery or without battery. I don't know why, have someone provide the idea to solve it? thank you

[zippylin]

After change a new battery, the don't charge problem is solved. I guess the original battery may be lock due to some reason, even I charge the cell by power supply directly
and the cell voltage already up to 11.8V.

[mon2]

Measure the voltage to ground of each pin on the battery connector @ J5151.

Post the measurements.

[PITERPENY]

tried SMC reset ?

[zippylin]

J5151:
pin 2 & 3 is 3.259V
pin 7 is 0V

any problem for this voltage measured result? thank you

[zippylin]

this's measure voltage on U5200

[zippylin]

tried SMC reset ?

I will try it later when I get another component and fix it on connector.

[mon2]

J5151 voltage check is ok for the SMBUS lines. They are not shorted.

Remove all power. Meter in resistance mode. Check the battery mosfet @ Q5265.

Measure the resistance across:

source (1-2-3) & drain (5-6-7-8) ; select any pin from each group
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8)

Post each measurement. Checking for a low resistance which usually means the mosfet is defective.

[zippylin]

J5151 voltage check is ok for the SMBUS lines. They are not shorted.

Remove all power. Meter in resistance mode. Check the battery mosfet @ Q5265.

Measure the resistance across:

source (1-2-3) & drain (5-6-7-8) ; select any pin from each group
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8)

Post each measurement. Checking for a low resistance which usually means the mosfet is defective.

The D to S: 1.619M ohm
G to S: 3.7M ohm
G to D: 4.97M ohm

thank you

[zippylin]

After change a new battery, the don't charge problem is solved. I guess the original battery may be lock due to some reason, even I charge the cell by power supply directly
and the cell voltage already up to 11.8V.