Hi.. Tried accessing the BIOS page as you described but the Mele just keeps booting into the log in screen.
This is from a cold power up with USB keyboard connected.
I'm starting to wonder if my Mele has some sort of USB fault as my USB docking station works initially, and then all of a sudden the drive letters disappear.
There is a bug in device firmware which you have to turn on device twice on the power switch.
Confirmed by mele on forum.
Try it without your USB hub. Pressing F7 after a reboot definitely works to get to BIOS settings.
The problem with your USB hub is not something that we've had any other customers report problems with, so it might be a problem with that particular hub. I see your post on the Mele forum about it. Mele are slowly returning to work after Chinese New Year and may be able to give you a better answer later in the week.
I removed your second post on this thread about the USB dock. It was off topic for the thread and there's no way to move posts to the correct thread. Please keep to topic.