A power failure during a firmware flash will ruin the motherboard bootloader.
Updating ZKTeco firmware requires a systematic approach to avoid "bricking" the device (rendering it unusable). The process generally involves three stages: Zkteco Update Firmware
Ensure the USB is FAT32. Make sure the file is in the root directory and not inside a .zip or .rar folder. Corrupted firmware or mismatched hardware platform. A power failure during a firmware flash will