Restoring the HP Z240 BIOS requires a hardware programmer (such as a CH341A programmer) and a clip to connect to the BIOS chip (often a Winbond W25Q64 or similar). Users must be cautious; writing a bin file with an incorrect layout or a mismatched ME region can cause the system to lock up or display "Manufacturing Mode" errors.
Low-quality bin files often have corrupted descriptor regions. When you flash a bad descriptor, you can lock yourself out of reprogramming the chip again—even with a hardware programmer. High-quality dumps have an unlocked or correctly configured descriptor.