BIOS not entering after latest update

CChassis New Member Posts: 1

I am finding trouble entering the BIOS of the UP board (32/4GB) after the latest UPC1DM07 update. The update completed successfully, and the board was operational for the following two weeks or so since then.
Now that I need to access the BIOS in order to boot from a USB drive, I get prompted for "Enter Password", to which I press Enter on my keyboard and nothing happens.

I did try to remove the battery for 30 seconds, and use other USB keyboards (the first one was the same I used to complete the BIOS update process).
Can you point me towards the right course of action when faced with this ?
Best regards.