grub

Got an HP ProDesk 400 G5 Desktop Mini (i5-9500T, 32GB RAM, 256GB NVMe). Had Proxmox running fine on it. Did a CMOS reset and now I can't get ANY Linux to boot - Proxmox, Debian, Ubuntu Server, nothing works. Everything hangs at ramdisk or black screens. I've spent hours on this. Tried: Every...