Sister-in-law has a Dell Inspiron 5680 that seems to have bricked after a bad BIOS update. The system is an i7-8700 with 1x8GB DDR4 RAM (SK Hynix 2400 MHz), 128GB M.2 SSD (SATA, SK Hynix), 1TB HDD, ...
The BIOS password is stored in a non-volatile memory, which can be cleared. Doing so clears the password too, allowing you to reset it. Here are several methods that you can use to recover your BIOS ...