Boot Order

[Margo.]

How do I change the boot order in the bios on Fitlet2? I have pulled up the boot order in the bios, but I can't figure out how to make a change stick. I have no sound and no printing in Mint20 and after 3 days of attempting to fix both, I'm ready to install Kubuntu. I have a bootable usb thumb drive, but I can't get it booted.
Thank You, Meg

[Margo.]

I figured it out; I needed to use the + key. I installed kubuntu and now my printer works, but I still don't have sound : (

[Andrey.Mazlin]

I figured it out; I needed to use the + key. I installed kubuntu and now my printer works, but I still don't have sound : (

Maybe this KB can be relevant?
https://fit-pc.com/wiki/index.php?title ... _out/SPDIF