Please follow the steps below:

1. Check the power source: Make sure the power outlet you're using is working properly. You can also try plugging the camera into a different outlet.

2. Check the power cable: Check that the power cable is not damaged or frayed.  You can also try using a different power cable to see if this solves the problem.

3. Reset the camera: Try resetting the camera by pressing and holding the Reset button for about 10 seconds. This will usually restore the camera to its default settings and may help to resolve minor problems.

If the problem persists or if you encounter any further difficulties, please don't hesitate to reach out to EZVIZ customer support for additional assistance.

Please note that for security reasons, it is sometimes necessary to reactivate the device before using it. Please follow the App Wizard or the steps below to reactivate your camera:

1. Tap “Activate device”.

2. Unplug the Ethernet cable or power cable and tick “The device is offline”, then tap “Next Step”.

3. Wait for the end of the offline detection process, and if successful, the page will jump to the “Take the device online” page.

4. Reconnect the Ethernet cable or power cable back and tick “The device is online”, then tap “Start Activate”.

5. Wait for the result of the activation, and if successful, you can then try to add your camera.