Dead ASUS ROG G14 (GA401)

[jacobtc]

Re: Dead ASUS ROG G14 (GA401)

Im sorry if this is a stupid question, but is this side ground? It measures 0.12 ohm, but the ?diode? Right above measures 20V on one side and 0V on the other… It just seems like the area marked with blue does not turn on, all measure 0-0.2V when plugged in and does not change when power button is pushed.

[Sephir0th]

Re: Dead ASUS ROG G14 (GA401)

It is GND and the "diode" is probably a Capacitor. Maybe we are on something with the 1.2V there, though. Detailed inspection of the circuit necessary, but not today (at least for me^^)

[jacobtc]

Re: Dead ASUS ROG G14 (GA401)

It is GND and the "diode" is probably a Capacitor. Maybe we are on something with the 1.2V there, though. Detailed inspection of the circuit necessary, but not today (at least for me^^)

Alright, but I am guessing 0.2V isn't normal either, right?

[Sephir0th]

Re: Dead ASUS ROG G14 (GA401)

Alright, but I am guessing 0.2V isn’t normal either, right?

I strongly suggest to forget this area immediately. That's for battery charging and has nothing to do with your issue. Voltage without battery present is useless and meaningless.

Edit: except you measure a short to GND at the coil.

[jacobtc]

Re: Dead ASUS ROG G14 (GA401)

I strongly suggest to forget this area immediately. That's for battery charging and has nothing to do with your issue. Voltage without battery present is useless and meaningless.

Edit: except you measure a short to GND at the coil.

Alright

[jacobtc]

Re: Dead ASUS ROG G14 (GA401)

It is GND and the "diode" is probably a Capacitor. Maybe we are on something with the 1.2V there, though. Detailed inspection of the circuit necessary, but not today (at least for me^^)

Is this the expected voltage for VRAM described in the schematic? Page 78.

[jacobtc]

Re: Dead ASUS ROG G14 (GA401)

Great success! New BIOS fixed it! Got it all stripped down to test, but it outputs display!
Now to figure out if the battery is salvable. I've had three generations of these G14, and common for them all is that they lock/kill the battery if anything happens with the board...

[Sephir0th]

Re: Dead ASUS ROG G14 (GA401)

Good to know, the thing you pointed out in the schematics is just feedback Reference voltage and has nothing ro do with the actual output of the Phase anyway.

Now I'd be happy if the issues stop from now on...

[jacobtc]

Re: Dead ASUS ROG G14 (GA401)

Good to know, the thing you pointed out in the schematics is just feedback Reference voltage and has nothing ro do with the actual output of the Phase anyway.

Now I'd be happy if the issues stop from now on...

Got Windows installed, and everything seems to work but the battery, so I will have to look into that... Have you had any luck unlocking batteries?

[Sephir0th]

Re: Dead ASUS ROG G14 (GA401)

Unfortunately not. I don't do that at all since this is only hobby for me. it just isn't economical for me tonsource a suitable device along with the mess to replace cells and all these things. Maybe someone else can help for this question.

[mcplslg123]

Re: Dead ASUS ROG G14 (GA401)

Not advisable to "unlocking" batteries.Often the battery management PWM goes into protection when you dis connect cells. Need programmer to unlock that protection. I tried it on 2-3 batteries in my spare time and was able to fix only one out of three. The cost,energy and time simply dont make any sense. I just did it once for my own experience sake.

[jacobtc]

Re: Dead ASUS ROG G14 (GA401)

Not advisable to "unlocking" batteries.Often the battery management PWM goes into protection when you dis connect cells. Need programmer to unlock that protection. I tried it on 2-3 batteries in my spare time and was able to fix only one out of three. The cost,energy and time simply dont make any sense. I just did it once for my own experience sake.

Alright, it just feels wasteful to throw out good cells. This is the third time doing it.

[jacobtc]

Re: Dead ASUS ROG G14 (GA401)

Bumping this thread in hopes of support for another thing wrong with this.

I finally received my battery, however Windows does not detect it charging at stays at 1%.
Battery norminal voltage is 15.4V, but is currently stuck at 15.1V and does not increase. Checked BQ, ACDET is 2.7V, ACOK is 6V, however BATPRES is 0V Is this a faulty aftermarket battery, or is something else wrong?

[mon2]

Re: Dead ASUS ROG G14 (GA401)

BATPRES is an active LOW signal. So when the battery is present, this pin should be low = 0 volts.

Remove the battery and this voltage should become a logic high value. Confirm it.

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

Post all measurements.

[jacobtc]

Re: Dead ASUS ROG G14 (GA401)

BATPRES is an active LOW signal. So when the battery is present, this pin should be low = 0 volts.

Remove the battery and this voltage should become a logic high value. Confirm it.

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

Post all measurements.

BATPRES is still low (0V) without battery.

All battery pins on board measure 0V.

[Sephir0th]

Re: Dead ASUS ROG G14 (GA401)

On some boards it is pulled to GND by factory

[mon2]

Re: Dead ASUS ROG G14 (GA401)

Good point. Forgot some models hardstrap the battery present pin to ground. Thanks.

Remove the battery and power adapter.

Meter in diode mode.

Red meter probe, yes red to ground.
Black meter probe to point to test.

We are interested in the diode mode readings of pin #3 and pin #4 of the battery connector. Again, disconnect the battery during these checks.

Pins #3 & #4 are the smbus SCL and SDA pins on the battery. We are checking if the ESD diodes at D5902 and D5903 are ok or if there are damaged from an ESD transient event.

[Sephir0th]

Re: Dead ASUS ROG G14 (GA401)

This thread has 6 pages already and I have no idea anymore what was tested and what not. So my suggestion is to test the DC-IN Mosfets (again)...

[jacobtc]

Re: Dead ASUS ROG G14 (GA401)

Good point. Forgot some models hardstrap the battery present pin to ground. Thanks.

Remove the battery and power adapter.

Meter in diode mode.

Red meter probe, yes red to ground.
Black meter probe to point to test.

We are interested in the diode mode readings of pin #3 and pin #4 of the battery connector. Again, disconnect the battery during these checks.

Pins #3 & #4 are the smbus SCL and SDA pins on the battery. We are checking if the ESD diodes at D5902 and D5903 are ok or if there are damaged from an ESD transient event.

Do you mean Pin #4 & #5? Pin #3 is a BAT+ line.

Pin #4 (CLK) reads OL
Pin #5 (DAT) reads 0.5V

[jacobtc]

Re: Dead ASUS ROG G14 (GA401)

This thread has 6 pages already and I have no idea anymore what was tested and what not. So my suggestion is to test the DC-IN Mosfets (again)...

The board does get power though, it turns on, but battery is not recognized correctly