ASUS ROG Strix G17 G713QM-HX016T (Mobo: G533-6050A3250201-A03) - 19V Missing

Hello Everyone,
I am looking for help to find fault please.




Main power line goes to 4V only and is dropping back to 0V.
Current draw in 12mA and drops to 0A in the loop (12mA and 0A again an again).
Laptop keeps trying because 4V and 0V is changing all the time.
Resistance to ground on this line is 95kΩ so line is not shorted.
I have checked coils for all the other power lines and resistance to ground is OK everywhere.
No shorts to ground and no thermal problem anywhere when I use thermal camera.
Input MOSFETS were tested OK. Battery charging is not working too.
Has anyone had similar problem please to point to the right direction ?
Thank you.
Regards,
Rafal S.

Hello!

Measure the following resistances to ground:
- On any pin of resistors R68000, R68001.
- On coil L68000.
- On pin 1 of transistor Q68011.

Hello Matic,
Thank you for your your help.
It looks like boardview for rev.A02 is different to my motherboard rev.A03:

- On any pin of resistors R68000 (2.1 MΩ), R68001 (not present in rev.A03).
- On coil L68000 (53 kΩ).
- On pin 1 of transistor Q68011 (not present in rev.A03)

Measure the resistances to ground on any pin of resistors A, B.

Hello Matic,
I have measured required values:
B - 21 MΩ
A - 2.8 MΩ

Measure the voltages to ground on pins 1, 4, 8 of transistors Q60010, Q60011, Q68012.

Hi Matic,
I have measured required voltages:
Voltages to ground on pins 1, 4, 8 of Q60010 (0.3V drops to zero and back to 0.3V, 0.5V drops to zero and back to 0.5V, stable 20V), Q60011 (0.5V drops to zero and back to 0.5V, 0.4V drops to zero and back to 0.4V, 4V drops to zero and back to 4V), Q68012 (0V, 0V, 0.2V). I was thinking the problem could be BQ controlling gates but after swapping IC nothing has changed.
Thank you for your continuous help.
Regards,
Rafal

Measure the voltages to ground on all pins of battery connector with the power supply + battery connected.

Hi Matic,
I have measured required voltages:

After measuring the same voltages when battery is disconnected detection pin goes from 3V to 0V.
However Clock and Data both are doing the same 0.5V to 0V and and 0.5V to 0V again.
Motherboard is not ready for communication when is not outputting stable 3.3V.
Thank you.
Regards,
Rafal