1. Is the LED flashing green when you turn the camera on? If yes, it means that the lens module can't be recognized. Please refer to Split's green LED is blinking continuously and no image output.
2. If the LED doesn't flash green, please try to power up Split with a phone charger(5V 1-3A) via USB. If it can be powered up, it means that the input power of the Split wasn't enough to your setup. Please power up Split with BEC/FC/VTx of 5V >=1A.
If the problem persists, please send your order info and a video showing problem to firstname.lastname@example.org.