Yep, whilst applying some updates to Manjaro, my screen goes blank and the system dies.
This time the updates are with 5.17, and it forced me to reboot and install 5.18. This was a little tricky as I could not boot 5.17 at all, and had to resort to 5.16 - glad I kept that. But because 5.16 is not supported by the Nvidia drivers I had to ssh onto my system remotely, and manually install linux518-nvidia to get it to build the kernel.