Lenovo SL510 does not charge the battery - Charge Circuit

Thread Starter


Joined Apr 17, 2022
Hi all,
I have a Lenovo SL510 motherboard that won't charge the battery. Windows, bios update, battery, power supply are 100% fine. So I decided to look at the motherboard and see if something was wrong with the power circuit. I saw that the connector solder was yellow. So I redid the soldering and it's now fine.
My power supply is Output: 20V 4.5A


I found the diagram about the charge circuit:

The fuse test i did on my motherboard was giving me 4.1 volts.

I also saw that PWR1, PWR2. are giving me 4.0 volts while I2C_CLK, I2C_DATA and TEMP give 3.36 Volts.

I'm a beginner at understanding a diagram, but I don't seem to have enough voltage to charge my battery. Is this possible?

Do you have any advice for me?

Thanks for your help.