Sorry to read about the failed BIOS update. I hope you get it resolved.
It doesn’t appear you’re new at this. Although, for future firmware update instances/cases:
• Ensure the laptop is connected to external power (i.e., charger)
• The fan(s) running at full speed during a BIOS update is normal.
— While the BIOS EEPROM is being re-flashed, it is not monitoring CPU and other temperatures. Therefore, as a safeguard/precaution, the update utility/motherboard set the fan(s) speed to maximum to reduce any possibility of overheating, which, at the minimum, could force/cause a shutdown, interrupting the BIOS flashing process leaving the BIOS incomplete.
• During/following a BIOS update, the system may reboot several times and appear unresponsive, including but not limited to a blank/off display, for possibly minutes
— This behavior can be:
* further verification
* adjusting, returning settings to defaults
* updating other firmware (e.g.
Intel Management Engine, VBIOS)
Most of these instructions/warnings are stated before and during the update process, though I hope it also helps to have some explanation.
I am not suggesting the recent situation is your fault, processes can certainly fail on their own for a multitude of reasons. However, with hardware updates, including firmware, it’s best to be extra cautious. Some people avoid firmware updates altogether no matter the benefits because of the risk of completely disabling a device.
Ultimately, it’s essential to be very patient for such processes.