: A specific "Authentication Failure" message on some models can be resolved by creating an empty folder named DeleteLicense
In ZKTeco ZKTime or BioTime software, if a user is marked "Inactive," the device will show "Authentication Failure" even though the fingerprint matches. zkteco authentication failure solution best
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ZKTeco advises that firmware upgrades are not recommended under normal circumstances unless necessary to address specific issues or security vulnerabilities. Before updating: : A specific "Authentication Failure" message on some
: Once the terminal reaches its main date and time UI screen, remove the USB drive. This flushes out conflicting background logs. Step 3: Resolve IP Conflicts and Network Redundancies This flushes out conflicting background logs
Contact your ZKTeco vendor or visit the official ZKTeco website to download the latest firmware. Copy the firmware file to a FAT32-formatted USB drive.
If you've tried all the above and the machine still doesn't work, the problem might be hardware-related: