There is no AV out from the RunCamHD.

This may be a monitor/TV system/wiring TX issue. Please follow the instructions:

1. Make sure monitor is working well;
2. Make sure TV system of camera is the same with monitor;
3. Make sure there is enough power for TX and the frequencies of TX and RX match;
4. Re-plug all the wires and cables;
5. Use a different AV cable.