Asus ROG Zephyrus G14 GA401IU-HE103T GPU Nvidia Issue

[tech_guru]

Hello all,
I am having an issue with this laptop, on which I repaired the motherboard on other power issues (PMIC, mosfets etc) and it came back to life, but I am having problem with the GPU NVIDIA GTX 1660. It gets error 43 in device manager with exclamation mark and does not work. When I install official asus driver or official nvidia latest, the error goes away until you reboot the laptop, where the error comes back again.
GPU-Z software does not show many information and vbios info is missing (photo attached).

Because the customer sent the laptop to 2 other labs trying to repair it, I don't know what they did exactly. I noticed that the bios chip was soldered and a connector next to it a bit melted from hot air, BIOS is also missing the serial number of the laptop, so something there is not nice. Also, usb mouse+trackpad do not work inside bios. FYI, BIOS shows the nvidia card.
GPU power rails and vram rails are all up and running.

Do you think that this could be software/bios/vbios related issue?
Attached you can find the bios and vbios chip dumps.

The board is GA401IV REV1.4.
Laptop Serial Number L7NRKD00345129B
BIOS latest 222
AMD RYZEN 7 with GTX 1660
CN: B60H
MFD: 2020-07

Thank you in advance.

[RM48]

Hi! I’m have a similar issue with your client’s laptop. My laptop suddenly went black screen and the fan was on with max rpm. When I’m playing any games, the issue wasn’t there, but when I was idle, it happened. I once checked armoury crate and the gpu is on power saving mode whilst being plugged in. A technician tested by removing the ram, and switching the ram, but the issue still persist. And the other technician told me to reinstall windows and now, without any games to run, my laptop immediately went black screen. I noticed that if I didn’t plug my laptop, it won’t go black screen. I also installed discord, but I can only open it once because after roughly 30 mins, it went black screen again. After the hard boot, i cant’t open discord and the laptop lags. I can move the cursor but I couldn’t open other app such as discord, i can’t even open device manager. I turned it on on BIOS mode and it can run properly without any issue (i ran bios mode for 1 hour).
is the problem is in the gpu, motherboard, or there’s other source that might cause that problem?

if you have any opinion or solution this issue, i kindly ask you to reply me.
Thank you and have a good day!