Is there an option to replace the navigation keys f5-f6 in BIOS?

Question

Iron

The keyboard is flooded, and the upper central part does not work - including the F5-F6 keys, which are used to navigate the BIOS. I'm trying to install Windows, but unfortunately without navigation keys I can't select Legacy Boot and so on.

Is there an option to somehow bypass the standard navigation and still get to the desired menu items?
(except for the option - buying a new keyboard, or tucking the keyboard in a service center)

Answer 1

I think:
1. merge the bios,
2. find in the code where the buttons that are responsible for this change one code to another.
3. Pour back.
another option is to take it to the service.
Well, the easiest option is to buy a keyboard or put some used one.
but the keyboard in our store costs 5 euros.