Asus ROG GA401QE (Ryzen 9)- weird issue

[gurj1979]

Hi guys,

I have pretty much just finished repairing this laptop after 3v rail shorted around 8 components.
Now I have the machine booted up with all voltages present.
Display etc etc works, I can get to BIOS without issues.

BUT - the problem is this.

Battery connected and is healthy. Wont turn on unless charger is connected.
Then I can remove the charger and it will continue to run from battery.

But if I turn off the laptop, it wont boot from battery. Have to stick in the charger again to trigger it.
All MOSFETs are good, no shorts anywhere.

Please help.

Thanks

[mon2]

Is the power adapter the original OEM and proper rated unit for this laptop?

The mosfets are still suspects. Remove all power and measure their resistance for a review.

source / drain
source / gate
gate / drain

Each should be hundreds of k ohms or higher else could be a leaky device.

[gurj1979]

Powers supply / chargers isn't the issue.
It wont turn on from battery when button is pressed.

Please read and try to understand the issue first.

[gurj1979]

Resolved myself - 1st replacement ITE KBC chip was a little bad. Swapped out again and works fine.

BUT - Noticed a different issue.
I have tried the Armory Crate GPU Power options - but it doesn't help.
GPU is still not showing up in Device Manager - Show Hidden shows no Nvidia.
Tried to install Nvidia drivers, but it says there is no Nvidia card detected.

I'm guessing a power rail missing for this.

[gurj1979]

All Resolved now.
U7004 had a dry solder at Pin 10 - GPU_RST#

Laptop working sweet now.