No luck. Still no image after following all those steps, before Windows 11 starts.

I can only assume this is perhaps not an incompatibility between the RTX 3060 and the motherboard (MSI Z590-A Pro), but my 4K monitor, since I was also unable to show any image, with the 2 SSDs 100% formatted, while trying to install Windows from the pendrive.

I connected the PC into my 1080p monitor - voila! Images from Windows AND the boot. Everything worked as expected. I was able to visit the BIOS again. Note: HDMI cable plugged into the GPU, not the onboard video.

Is it possible this is a corrupt Windows 11 installation? Because I am willing to do another format for these 2 SSDs, yet I highly doubt this will solve my problem.

I have a few images of my PC running on this lower-res TV, and the whole process:

https://i.postimg.cc/L81tgmLG/IMG-3330.jpg
https://i.postimg.cc/MTdVJHJf/IMG-3331.jpg
https://i.postimg.cc/XvK9xx28/IMG-3332.jpg
https://i.postimg.cc/fLwmPXph/IMG-3333.jpg
https://i.postimg.cc/0N1pphCj/IMG-3334.jpg

The only step I didn't understand correctly was this one:

Select NVIDIA SOFTWARE and DRIVERS (while running DDU)

As you can see from image 3333, there isn't such an option, and that's why in image 3334 it says PhysX is already installed, because it wasn't removed. I left the default options selected there, for the removal.

This is what I think it is:

- It can't be the OS fault, because I had no image, too, when the SSDs were formatted, they are brand new. I remember having deleted all partitions prior to the format and installing Windows 11. And if this isn't the OS fault, it must be the hardware - so, in this case, the RTX 3060 Asus Dual O12G / V2 (GeForce). Because I never had NO IMAGE before buying this GPU, with the onboard video plugged into this 4K monitor, via HDMI. This is a new problem.

The monitor in my case is the Acer XV280K-B. Using 3840 x 2160 @ 60 Hz. Serial number MMTJLAA0020441DF154200

If you go to Acer's page, it will only say the drivers are probably from 2019 and limited to Windows 10-64 bit.
https://www.acer.com/br-pt/support/product-support/XV280K/MM.TJLAA.002/downloads

While the manual is in portuguese, it's not so much different from similar 4K (and Acer) models. The current options I enabled for it are:

OverDrive - NORMAL
FreenSync - ON
Ultra-Low Latency is ON, but greyed out

Input, HDMI #1 (2.0) - looks like it has two of these ports
AutoSource = ON
DPFormat = DP 1.2
Wide Mode = FULL
DCC/CI = ON
HDMI Black Level = Normal

All the others are off, so no use mentioning BLUE LIGHT, ACM, HDR, SUPER SHARPNESS, REFRESHRATE NUM, AIMPOINT...

When the system starts for the 1st time (or WIN-11 restarts), it's funny how the monitor keeps switching between modes, and finally gives up and turns itself off. Only when Windows is really available, it turns itself on.