Hello,

I have an Optiplex 7020 that someone gave me. They told me that the computer has a bad hard drive. I am trying to boot the computer from a USB drive (ubuntu 18.04) to see if the computer will work before I purchase a new hard drive. However, I cannot get this thing to boot to the USB drive. I can hit F2 during boot and get to a setup menu, and I have tried a bunch of different settings in the setup: both Legacy and UEFI.  But I don't seem to be finding the right settings. Does anyone know the right combinations of settings to enable me to boot from a USB drive?

Also, hitting F12 during boot does not seem to do anything for me.

Thanks for the help.