It’s possible you might need to reconfigure the graphics hardware now that you have updated your BIOS. Perhaps the card is no longer active, or needs a graphics priority of some kind to be set before appropriate drivers can be installed.
This is only a guess, and probably only one of many scenarios possible. I suggest providing enough information for others to at least make an educated guess.
As an infrequent forum user, please take some time to familiarise yourself with Forum requirements; in particular, the many ways to use the forum to your benefit:
The Update Announcements should be checked frequently for important update related information.
These announcements contain a Known Issues and Solutions section and should generally be checked before posting a request for support.
Output of the following command formatted according to forum requirements (see links above) may be useful for those wishing to help:
inxi --admin --verbosity=8 --filter --no-host --width
Be prepared to provide more information and outputs from other commands when asked.
Regards.