what settings?
error message - the only way the board can communicate error
That often helps
Not necessary - the process is exactly the same - just provide an earlier firmware …
I think it is relevant - perhaps you have placed the card in the wrong pcie slot?
Even as you state - I con boot Windows - possibly - but Windows is not LInux.
I have absolutely no ideas left.
And you have not yet provided any respnse to my query about booting to TTY from Manjaro Live ISO.
Seriously?
When I have already directly replied to you in post 9, that I am not using VM…
And u are asking it again in post 20?
Thanks for your time…
Yes because booting using Ventoy is NOT bare metal…
Plus we still have no command output of your exact system, just your descriptions…
So yea, i guess ill exit this stage from the right…
Sorry, I made a mistake when doing this - hence the extra time taken.
Let me understand your approach:
This TTY approach is using the TTY from live media, to install NVidia driver, directly into an installed version of Manjaro?
I managed to boot into TTY, and following your guide, it prompted me to choose which Linux to mount, then it installed the NVidia driver.
Right now, with RTX4060 installed, CSM OFF, Secure Boot OFF, I’m able to boot into the previous installation of Manjaro (the successful installation from R290).
So, the next question is: how about booting a live media to install new copy of Manjaro?
Fantastic 
That would be using the proprietary driver selection in the ISO boot menu.
I tried this approach previously - stuck.
If you have a working installatin now - why would you reinstall - simply updating your system will suffice.
sudo pacman -Syu
I cannot help you there - you may need to add specific instructions for the kernel - same method as adding the boot to runlevel 3.
But those kernel arguments I have no knowledge about - I keep Nvidia at a distance - so I cannot help you with that.
New issue:
I can boot into Manjaro now.
But some apps cannot be launched.
Telegram (Flatpak) reported OpenGL disabled, and cannot launch.
After I clicked OK, it launched…
QBitorrent (Flatpak) failed to launch, no error prompted - just no response after clicking.
Makemkv (Flatpak) also failed.
Reboot, and still same.
Edit:
I uninstalled, and reinstalled back.
During installation, the flatpak installed org.freedesktop.platiform.GL.nvidia.
And these 2 apps working now.
I guess org.freedesktop.platiform.GL.nvidia makes all flatpak working in NVidia now.
Still trying to find a way to install Manjaro with Nvidia card installed…
New issues are best tackled in new topic(s)…
Remove the flatpak apps and reinstall them
For installing anew you would likely need an ISO with the newer drivers.
For the benefits of other users experiencing the same issue with NVidia card,
This above would allow an installed Manjaro to boot using NVidia card.
ie. You need an installed copy of Manjaro + a working version of live media.
After booting into Manjaro, some of the apps would need to be refreshed - uninstall and reinstall.
I still haven’t found a way to boot into live media on Nvidia card - which as @linux-aarhus said: maybe the solution is to wait for new manjaro ISO with newer Nvidia drivers.