Appendix A Troubleshooting, Daily
Maintenance and Glossary
Appendix A Troubleshooting, Daily Maintenance and Glossary
Troubleshooting
1. NVR does not boot up properly
Possible reasons:
• Input power is not correct
• Power connection is not securely attached
• Power switch button is damaged
• Program upgrade version is wrong
• HDD malfunction
• Seagate DB35.1, DB35.2, SV35 or Maxtor 17-g has a compatibility problem —
Upgrade to the latest version to solve this problem.
• Front Panel error
• Main board is damaged
2. NVR often automatically shuts down or stops running
Possible reasons:
• Input voltage is not stable or it is too low
• HDD malfunction
• Video signal is not stable
• Working environment is too harsh; too much dust
• Hardware malfunction
3. System cannot detect hard disk
Possible reasons:
• HDD is damaged
• HDD ribbon is damaged
• HDD cable connection is loose
• Main board SATA port is damaged
4. There is no video output whether it is the one-channel, multiple-channel or all-channel
output
Possible reasons:
• Program is not compatible—upgrade to the latest version.
• Brightness is set to 0. Restore factory default setup.
• There is no video input signal or it is too weak
• Check the Privacy Mask setup or your screen saver
• NVR hardware malfunction
NVR4200 Series User Guide
215
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