Mastodawn

Can anyone help me with a Dell #OptiPlex?

Boot starts Windows setup (which I don't want), but pressing F2 during boot seems to be invoking a video mode that my very old HDMI monitor doesn't support.

It has an HDMI signal but the display shows "NO SUPPORT", unlike if I just let it boot to the Windows installer which displays correctly.

I'm trying to get to the BIOS so I can boot from a USB with #Proxmox installer and then setup #HomeAssistant using the Px script.

There is a procedure where you can opt within windows to reboot to EFI BIOS.

Either

shutdown /r /fw /t 0

In cmd or via GUI

https://www.tenforums.com/tutorials/5831-boot-uefi-firmware-settings-inside-windows-10-a.html

Perhaps this helps. Or simply hang it to your TV HDMI 😉