i don't know if my screen is blank because of a hardware issue or setting, but i can not even access the bios.  the screen is blank at the very start

i came across flashrom and coreboot pages after a duckduck search, but i can't figure out what environment these programs are designed for, or how to use the programs.  for example, i can't figure out if i can use these programs to flash a bios without any keyboard input (because there's no video)

are there pages on what flashrom is and how to use it

or what coreboot is, and how to use it

i did look around, but these questions weren't part of the faqs