Dahua DH-XVR54 L-I2 Series User Manual page 367

For some versions, there is hardware limit.
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13. Cannot log in client-end or web.
There are following possibilities:
For Windows 98 or Windows ME user, update your system to Windows 2000 sp4. Or you can install
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client-end software of lower version. Note right now, our DVR is not compatible with Windows
VISTA control.
ActiveX control has been disabled.
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No dx8.1 or higher. Upgrade display card driver.
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Network connection error.
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Network setup error.
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Password or username is invalid.
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Client-end is not compatible with DVR program.
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14. There is only mosaic no video when preview or playback video file remotely.
There are following possibilities:
Network fluency is not good.
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Client-end resources are limit.
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There is multiple-cast group setup in DVR. This mode can result in mosaic. Usually we do not
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recommend this mode.
There is privacy mask or channel protection setup.
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Current user has no right to monitor.
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DVR local video output quality is not good.
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15. Network connection is not stable.
There are following possibilities:
Network is not stable.
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IP address conflict.
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MAC address conflict.
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PC or DVR network card is not good.
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16. Burn error /USB back error.
There are following possibilities:
Burner and DVR are in the same data cable.
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System uses too much CPU resources. Stop record first and then begin backup.
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Data amount exceeds backup device capacity. It might result in burner error.
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Backup device is not compatible.
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Backup device is damaged.
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17. Keyboard cannot control DVR
There are following possibilities:
DVR serial port setup is not correct.
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Address is not correct.
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When there are several switchers, power supply is not enough.
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Transmission distance is too far.
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18. Alarm signal cannot be disarmed.
There are following possibilities:
Alarm setup is not correct.
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Alarm output has been open manually.
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User's Manual