1) It maybe that the system is unable to start due to insufficient power supply. - Please change another working power supply to connect the system to try.

2) If you installed an internal hard disk in the system, the hard disk has bad sectors may also cause this problem. - Please disassemble the rear cover of the DVR/NVR system and unplug the date wire and power wire of the hard drive to try.

3) If neither of the above steps work, it sounds like the DVR/NVR system is experiencing a firmware crash. This sometimes occurs if the power is disconnected without performing a proper shutdown through the menu. Manually applying a firmware update should help it to function normally.

• Please provide us the order number of your system.
• Please provide us the model number of your system. On the outside of the DVR/NVR, you should find two labels with the model number and device ID. Please provide these details, and we'll send you the firmware update link and instructions.

If possible, pictures of these labels would be ideal to ensure we locate the appropriate firmware for you.

Please let us know if you have any questions.