Please try the methods below:
1.Make sure the camera is powered by standard
DC12V 1A; Try different power sources if possible;
2.Connect the camera directly to a monitor(AV mode)
without any extension cable and TX/RX;
3.Switch PAL/NTSC system of the monitor;
4.Re-plug all the cables to make sure all are well
5.Keep a distance of 1m and avoid wiring the camera
near any other 220V/110V cable. If not, use foil
wrapped coax cable to the camera which will help
reduce Electromagnetic interference;
6.Reset the camera if you can access the OSD menu.
If the camera is still not working as expected after troubleshooting, please contact us by email firstname.lastname@example.org. We will arrange free replacement or issue refund to you ASAP!