I am having the same problem. I just got the laptop this week. I wanted to boot from USB which was impossible with the current BIOS. After the BIOS update and reboot everything went black. When I press Caps Lock the LED won’t toggle. I take this as a particularly bad sign.
I think at this point, the BIOS chip will need to be replaced or temporarily removed from the board for flashing of a new BIOS. But that is at the moment beyond my abilities.
