© 2026 Finley Lighthouse
Enable combined verification (e.g., Face + Fingerprint) for higher reliability if one method frequently fails. Admin Reset (If Locked Out)
For fingerprint scanners, clean the optical sensor with a soft, lint-free cloth. If users still fail, try re-enrolling fingerprints or ensure fingers are dry. Software & Connection Troubleshooting zkteco authentication failure solution best
: A hard reboot—disconnecting power for 30 seconds—can resolve software crashes or frozen screens that prevent proper authentication. Quick Reference: Default Credentials Installation & User Guide - ZKTeco Enable combined verification (e
Troubleshooting Common Causes of Biometric Authentication Failure Square the result (8849 x 8849 = 78,304,801)
If the failure is due to a forgotten admin password, use the method: Check the current device time (e.g., 11:50). Subtract it from 9999 (9999 - 1150 = 8849). Square the result (8849 x 8849 = 78,304,801).
: Verify that communication ports are open. ZKTeco typically uses port 4370 for TCP/IP communication.
Enable combined verification (e.g., Face + Fingerprint) for higher reliability if one method frequently fails. Admin Reset (If Locked Out)
For fingerprint scanners, clean the optical sensor with a soft, lint-free cloth. If users still fail, try re-enrolling fingerprints or ensure fingers are dry. Software & Connection Troubleshooting
: A hard reboot—disconnecting power for 30 seconds—can resolve software crashes or frozen screens that prevent proper authentication. Quick Reference: Default Credentials Installation & User Guide - ZKTeco
Troubleshooting Common Causes of Biometric Authentication Failure
If the failure is due to a forgotten admin password, use the method: Check the current device time (e.g., 11:50). Subtract it from 9999 (9999 - 1150 = 8849). Square the result (8849 x 8849 = 78,304,801).
: Verify that communication ports are open. ZKTeco typically uses port 4370 for TCP/IP communication.