This is the official method Ramesh used when the button wasn’t there.

To reset your Multistar DVR password, you can try several methods, ranging from using default factory codes to performing a hard hardware reset. Method 1: Try Default Passwords

Ramesh opened the DVR case carefully. On the main circuit board, near the battery or the front panel connector, he spotted a small, unmarked button or two tiny solder pads labeled or “CLR CMOS.”

Before performing a hard reset, try the following factory defaults: User: admin / Password: (leave blank) User: admin / Password: 123456 or 888888 User: admin / Password: password 3. Using the QR Code Method