Do you know the password of log in the DVR ?
- If not, you need to contact the DVR supplier for the super password and restore the DVR to factory settings.
- If you know the password, then you can log in the DVR (DVR connect to Monitor with VGA or HDMI interface ) and get into the main menu, there's usually an option of restore to factory settings, you just need to enable the option.
- If you cannot get in touch with the DVR supplier and don't know the psw, you may need to change a new DVR.