Another thing to try is a CMOS reset: CMOS reset 
Got a brand new Aurora 10 ryzen 5800x, 3080ti 5hours ago. I did some minor customizations from dell when I purchased it - upgraded cpu, more ram, windows 11 instead of 10. So I turn it on everything is working fine, run a windows update and restart. When the machine starts up, my monitor is showing a black screen (not in power saving mode) my keyboard and mouse light up for 1 second then go black, the alienware icon on my pc blinks white once and nothing else happens. The machine repeats this loop indefinitely every 5 seconds. Tried unplugging all cables (including power) and leaving it for 30 minutes and it does nothing - same problem. Since the screen stays black I can't even get into bios. I tried pressing f2, f12 like crazy - nothing. Did my motherboard go bad after the first restart ... lol? This is sooo disappointing, waited a month to get my machine to have this happen.
Aurora 10, brand new, will not boot