When you encounter this kind of problem, please don't worry.
There are 3 main reasons for this problem, please follow the steps below to solve:
1. Something wrong with the dip switch setting, kindly check the instruction diagram and make sure the setting is correct;
2. LVDS-IN & LVDS-OUT cables are wrongly connected, kindly switch these two cables connection;
3. System Glitch:
- Reboot the system, connect the CarPlay to the phone, and enter the CarPlay system directly. >> Enter Setup.
- Open Setting >> TV >> OFF
- Open Setting >> DVR >> OFF
- Open Setting >> DVD >> OFF