If your system won't POST (black screen) but your board supports BIOS Flashback (a button on the rear I/O), you can update without entering BIOS.
Locate your USB drive in the utility, select the new BIOS file, and confirm the update. american megatrends 465 bios update top
Flashing usually resets the BIOS to factory default settings, meaning you may need to re-enable custom settings like XMP profiles or fan curves. If your system won't POST (black screen) but
A: This is often a hardware detection error. Unplug all USB devices, remove extra RAM sticks, and disconnect non-boot drives. Then clear CMOS and try to boot. If it still freezes, you need the BIOS update (but you need Flashback or a programmer to apply it). select the new BIOS file