Time on monitor keeps displaying 2000 after power cut.
1. try to restore DVR to factory default like picture below.
2. you can buy another time battery because maybe battery is dead.
You need open DVR to replace battery. Here is method to open DVR:
https://hview.kf5.com/hc/kb/article/1032594/?from=draft
Picture below shows where battery is located.
If time on monitor keeps showing wrong time after several hours you correct it.
Go to Main Menu--System--Netservice to set up NTP.
Reboot system after you finish all.
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