This is the "nuclear option," but it is less effective on modern DVRs.
Check the back or side of the unit for a small pinhole. Insert a paperclip and hold for 10–20 seconds while the unit is powered on [20]. 3. CMOS Battery Method traice dvr password reset upd
Plug the DVR back in without the battery. The date should reset (often to 2000-01-01 or 2010-01-01). Try the default passwords mentioned above [5.1]. 4. Technical Support & Super Passwords This is the "nuclear option," but it is