The timestamp on the screen is dynamic. If you wait too long to enter the master password provided by support, the code will expire, and you will have to request a new one.
If the automated tools fail, you can obtain a master code directly from the manufacturer. Provide your device's Model Number Serial Number Longse Technical Support longse dvr password reset link
: Go to the login interface on your DVR and click "Forget Password" . The timestamp on the screen is dynamic