Ganz ZR-DH1621NP Instruction Manual page 38

Symptoms
No playback of audio with video.
No firmware upgrade.
Firmware upgrade failed.
Network firmware upgrade failed.
No network connectivity
No remote control over network
No time server function
No firmware upgrade over network
No time server function
No E-mail Notification of alarm condition - Make sure that all alarm conditions are set properly
Lost Administrator password
Lost Web Access password
Lost Master password
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Resolution
- Check all audio in/out connections to DVR
- Make sure audio is activated and configured
- Make sure audio is associated with an active video
channel
- Check that new firmware version is correct
- Check that USB FDD or ZIP Drive has correct file
- Check network connection; check Internet gateway
- Check network connection to LAN and DVR
- Make sure network configuration is correct
- Make sure all configured IP addresses are correct
- Make sure the network access password is correct
- Make sure network has gateway to the Internet
- Check network connection to LAN and DVR
- Make sure network configuration is correct
- Make sure time server setting correctly specified
- Make sure network has gateway to the Internet
- If private time server is not available try public servers
- Check network connection to LAN and DVR
- Make sure network configuration is correct
- Make sure that e-mail notification settings are correct
- Recover lost Admin Password using Master Password
- Recover lost Web Password by changing it locally
- Cannot recover lost Master Password Contact service