My monitor appears to have failed and I was looking for any guidance on next steps.
XG27UQR, manufactured July 2021. Had it about 15 months.
I know it is the monitor because I don't even see a logo on power-up and I can't access any in-monitor menu options via the buttons/stick at the rear.
It does know when the PC is sending a signal because the little light at the bottom turns from orange (no signal) to white (signal).
PC works fine with other monitors.