Hi everyone, i have a Dahua 504 analog DVR with a camera installed in an apartment out of town and a smart PSS software on my remote desktop computer to watch live view when i want. recently it seemed like the electricity went off for a while and when it came back the date in my DVR and my surveillance software went back to the year 2000. i fixed the date and time using the software by clicking on "device configuration" then "maintenance" then "date and time". the problem is that it only last for about 24 hours more or less and i have to do the same thing again everyday to keep the date and time updated, anyone knows what should i do to fix date and time and stays correct once and for all ! thanks