Lenovo IDEAPAD 3IML05 Motherboard GS452/GS552/GS572 NM-C781 NO BATTERY CHARGING

This laptop has new battery and charged up to 97%
Battery voltage is 7,5V
When power supply is plugged voltage reach 8,0V but charging led is always white and OS shows 97% but doesn’t go on.

Hello!

Install a Battery Mon software and post a screen of "Battery Info" with the battery + power supply connected.

Measure the voltages to ground on pins 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 17, 18. 19, 20, 24, 25, 28 of charger chip PU5301 with the battery + power supply connected.

Sorry I wrote a wrong value, pin 1 and pin 2 of battery connector voltage is 0,8V and not 8,0V and with PSU connected led near power connector is orange.

1=19,8V
2=19,8V
3=20V
4=20V
5=3,3V
6=2,8V
10=0V
11=3,3V
12=3,3V
15=0,3V
17=0,8V
18=0,8V
19=0,8V
20=0,8V
24=6V
25=5,6V
28=20V

Pin 4 should be about 26V.
Check that PQ5301 and PQ5302 are not shorted.

Hello
You’re right PQ5301 was open drain and source
Now it works.
Thank you