why would you try flashing a bios for a non boot issue???!!!!! it still amazes me that people think a bios update will fix any and all problems, when in reality all it does is dig a deeper hole by adding yet another issue...namely a corrupted bios to go along with the no boot issue in this case
all you had to do (before trying a bios flash) is
1.determine if the boot drive shows in the bios and if it's the listed boot device if drive/ssd is shown as a boot device go to 2
2. try booting into recovery mode, if not possible try a bootable utility Disk/usb key and if system boots from util device see if the main boot device can be seen and run a OS recovery (there are numerous util disks and methods to do a OS reinstall that preserves existing data, but you should still back up any wanted data before a Restore/repair is attempted
3. if necessary run a SSD/drive check from the util disk to confirm the device has not failed or is failing
4. if the above is not successful, a clean OS install can be done
trying to flash a bios when you have existing problem is the worst thing you can do!!! you need to fix any existing issues before trying to do a bios update.
http://h10032.www1.hp.com/ctg/Manual/c04823811
https://www.auslogics.com/en/articles/fix-windows-10-will-not-boot/