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1. Program error, please try to reboot the DVR.
2. HDD data error caused by bad track and bad clusters, please detect the
HDD. If the HDD is defective, please change the HDD.
3. Hardware error of DVR, please contact the supplier.
DVR cannot connect network.
Possible causes:
1. Please check if the network physical connection is correct or not.
2. Please check the DVR network parameter configuration.
3. Please check if IP conflict exists in the network.
The download or backup video cannot play normally.
Possible causes:
1. Player is not installed correctly.
2. The file system error of the backup U disk or removable hard disk.
3. Graphics speed up software whose version is above DX8.1 is not installed.