Lenovo V360, no detect battery

[pabloroggeri]

Hi friends!


It does not charge or detect the battery. At first it didn't start, I programmed the BIOS with the file that is in this forum and it turned on but it doesn't detect a battery. I need to try another bios that is not the one that is already published in the forum, I suspect that the one I recorded is corrupt, or incompatible in some detail and that is why it does not detect the battery. I did all the measurements on the charguer integrated circuit and they are all ok. I think the problem comes from the data BUS side. It is for this reason that I need a different bios file than the one published in the forum to test.


Motherboard: HannStar LA36 MB 09939-1
09939-1
48.4JG01.011

IC charguer : BQ24745

EC: NPCE781EA0DX

Bios version: 2DCN16WW
EC version : 2DEC02WW

[mon2]

Re: Lenovo V360, no detect battery

Unable to comment on the bios issues but for the battery pack - investigate the voltages on EACH pin on the battery connector.

Specifically, we are interested to confirm the SMBUS / I2C (SDA & SCL) lines are ok since they are used by the logic board to communicate with the BMS (battery management system). This will be a good start.

[Udemzy]

Re: Lenovo V360, no detect battery

Since you already got an idea of where the fault might come from,i'll suggest you do that first or you can measure the SDA and SCL line with your oscilloscope or measure the bios chip pins with the oscilloscope.