Time on monitor keeps displaying 2000 after a power cut.
1. try to restore DVR to factory default like the picture below.
2. you can buy another time battery because maybe the battery is dead.
You need to open a DVR to replace the battery. Here is the method to open DVR.
The picture below shows where the battery is located.
Time on monitor keeps showing the wrong time after several hours you correct it.
Go to the Main menu--System--Netservice to set up NTP.
Reboot the system after you finish all.