How to downgrade Hp 6830 BIOS F.20 version?

[windofchange998]

Hi,

i have a problem with my Hp 6830s BIOS version which is F.20. I like to flash with the modded Bios, but the after trying any tool, i get not successes.
I also try with HP BIOS recovery to revert back to F.13, but the screen remain black after properly inserted USB on boot. I don't know what else to do. Please help me somehow to revert the BIOS version from F.20 to F.13. Anyone? please.

[okelly]

Unfortunately, from the description of enhancements on the download page:

"- Provides improved security for the BIOS flashing process. After installing this BIOS version onto the system, prior BIOS versions cannot be installed onto the system."