In rare cases, removing the silver coin-cell battery (CR2032) from the motherboard for 5 minutes will reset the system clock to 2000-01-01, allowing you to use a known "default date" password.
rommon 1 > confreg 0x2142
Release the short and wait for the system to reboot. The password should now be cleared or reset to the factory default ( admin with no password). 3. Software Recovery (Super Password) 7004t-lm-v3 password reset
Power off the DVR and remove the outer casing. In rare cases, removing the silver coin-cell battery