Greetings,
I have Dell OptiPlex (bought in 2023) and have the same exact issue. The blank screen. I think something is wrong with the display of Rescue Disk 18 because after a couple of minutes which new linux shell is loaded, then pressing Alt+Ctrl+Del does not reboot the computer. It is strange to me how come this issue is not resolved yet.
I should also add that I cannot run limited graphic or hardware info as well.
Regards,
Ali