ASUS ROG G14 (GA401) battery spark, dead.

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

I'm considering buying a new battery for it, however, before throwing the same amount of money for a battery, as I initially gave for the machine it self, I was wondering if there are any checks I can do to check the current battery?

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

These pins still measure same voltage with the system powered on:

batpres = 0v
lodrv = 0v
hidrv = 0.223v
srn = 0.223v
srp = 0.223v

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

If you are checking voltage, yes, the logic board should be ON.

If you are checking resistance, the logic board must be always OFF.

I thought by ON, you meant with AC adaptor plugged in, and with it OFF, not plugged in. I will have to redo all measurements then
It will be difficult to do some of the measurements, as the heatsink etc obstructs many of the components etc. Also, I can't measure on the back, as the board has to be installed for the power button ribbon to reach.

[mon2]

Re: ASUS ROG G14 (GA401) battery spark, dead.

If you are checking voltage, yes, the logic board should be ON.

If you are checking resistance, the logic board must be always OFF.

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

What is the voltage on each of these pins with the battery connected ?

So attach the external power adapter & battery -> power up and take the measurements.

Both pins now show 3.3V.

Should I have done previous measurements with the system on as well? I only just now noticed that you wanted me to power up the system before measuring.

[mon2]

Re: ASUS ROG G14 (GA401) battery spark, dead.

What is the voltage on each of these pins with the battery connected ?

So attach the external power adapter & battery -> power up and take the measurements.

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

I think that the BMS logic inside the battery pack is not communicating properly and resulting in the 100% charge reading.

What is the voltage readings on pins 3 & 4 of the battery connector ?

Have seen cases where these I2C lines are defective and with similar results. If the charger IC believes the charge is full, no work is to be done so turns off the battery linked mosfets.

Both pins are reading 0.06V not connected to the board.

[mon2]

Re: ASUS ROG G14 (GA401) battery spark, dead.

I think that the BMS logic inside the battery pack is not communicating properly and resulting in the 100% charge reading.

What is the voltage readings on pins 3 & 4 of the battery connector ?

Have seen cases where these I2C lines are defective and with similar results. If the charger IC believes the charge is full, no work is to be done so turns off the battery linked mosfets.

[Stevedb]

Re: ASUS ROG G14 (GA401) battery spark, dead.

By the way here is shematic and brdview

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

That is very strange how much voltage do you have on battery if you measure it on battery connector.

The same.

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

@Mon2 can it not be the battery is overdischarged over is treasure limit.

That is what I am thinking, but before I started diagnosing the machine, I was pretty sure that it was at close to 100% charge, and I didn't leave it in the machine, so having it discharge completely over a couple of months seems unusual.

[Stevedb]

Re: ASUS ROG G14 (GA401) battery spark, dead.

That is very strange how much voltage do you have on battery if you measure it on battery connector.

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

Battery wil not give voltage if not connected. Can you measure voltage on the battery at all when it is. Connected

When connected, it stills shows as 0,5V on the battery.

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

See attached.

Post the voltage readings for each point of interest on the battery charge mosfets.

Attach the external power adapter & battery.

Meter in 20V scale. Red meter lead to point to test; Black meter lead to ground.

Yes, it is possible that the battery BMS (battery management system) has shut down due to the spark but others can share their comment on this topic. If you have access to, try a replacement battery for testing.

When the system is booted, does Windows report the presence of the battery ? Battery level ?

The SMBUS / I2C lines seem to be ok with the posted resistance but you can also perform another test.

After the logic board is powered up with the battery -> measure the voltage of the battery connector pins (SCL & SDA) to check if the interface lines are defective or not.

What voltage do you read with respect to ground for the battery connector pins 3 & 4 ?

Here is the readings for the mosfets:
PQH8901:
D: 20V
S: 0,223V
G: 0,223V

PQL8901:
D: 0,223V
S: 0V
G: 0V

Yes, battery shows up in Windows and bios, and reports as 100% charged.

[Stevedb]

Re: ASUS ROG G14 (GA401) battery spark, dead.

@Mon2 can it not be the battery is overdischarged over is treasure limit.

[Stevedb]

Re: ASUS ROG G14 (GA401) battery spark, dead.

Battery wil not give voltage if not connected. Can you measure voltage on the battery at all when it is. Connected

[mon2]

Re: ASUS ROG G14 (GA401) battery spark, dead.

See attached.

Post the voltage readings for each point of interest on the battery charge mosfets.

Attach the external power adapter & battery.

Meter in 20V scale. Red meter lead to point to test; Black meter lead to ground.

Yes, it is possible that the battery BMS (battery management system) has shut down due to the spark but others can share their comment on this topic. If you have access to, try a replacement battery for testing.

When the system is booted, does Windows report the presence of the battery ? Battery level ?

The SMBUS / I2C lines seem to be ok with the posted resistance but you can also perform another test.

After the logic board is powered up with the battery -> measure the voltage of the battery connector pins (SCL & SDA) to check if the interface lines are defective or not.

What voltage do you read with respect to ground for the battery connector pins 3 & 4 ?

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

Just measured on both pins, both are at 0.5 Mohm.

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

Does the logic board function without the battery ? It should.

If it does not, the battery is not a factor. For now, work without the battery.

You can inspect the SMBUS (I2C) lines on the battery connector.

Remove all power. Meter in resistance mode.

Check the resistance to ground of the following:

P_SMB0_CLK - pin 3
P_SMB0_SDA - pin 4

Red meter lead on the pin; black to ground.

What are the resistance readings for each ?

Yes, the board works without the battery connected.

Should I measure resistance on the battery, when it is not connected to the board, or on the terminals on the board, when the battery is connected?

Also, the connector does not seem to have a P_SMB0_SDA pin, only a CLK and DAT pin, see pic.

[jacobtc]

Re: ASUS ROG G14 (GA401) battery spark, dead.

what is board number ?

ga401iv r1.4