Dual Boot issue

I had Dual Booted Windows 10 and 11!

For 3 days, it worked fine, but from the fourth day, whether I restarted, or started after a shut down, the boot manager didn't lit up only! The screen is dark and I literally have to assume with just a pointer visible where the OS name is written and continue with it!

Plz anyone help!

Windows11 Pernille-Eskebo