I want to replace HAOS with Ubuntu. Having difficulty

I shouldn’t have installed HAOS on my server. It doesn’t allow for the configuration I want. I’m trying to install Ubuntu via USB, but when I plug in the flash drive and turn it on I just get a black screen. When I remove the flash drive and reboot, HAOS starts up, but the boot menu never comes up so I don’t get the option to boot from usb.

I don’t understand what I’m doing wrong or how to fix it. Is it normal for the boot menu not to come up with HAOS? Is there a way to install Ubuntu from the HA command line?

It depends on the machine you are trying to install Ubuntu onto.

If it’s a regular PC then maybe you need to go into your BIOS settings and enable it to boot from USB?

Otherwise this isn’t really an Ubuntu support forum.