RDV6563FG-NET controller, motherboard communication failure

The amount of information you provided is limited, and I am unable to determine the specific cause of your problem. However, you can follow these steps to troubleshoot, hoping to help you
1. Please use the product specific DB9 connection cable.                         
2. Please check if the DB9 connection cable is stable. Please unplug and plug the DB9 terminal again, and tighten the fixing screws at both ends of the DB9 connection cable.                             
3. Please replace the DB9 connection cable with a new one.                                  
4. If the indicator light is not flashing, please power on the motherboard again.                     
5. Hardware interface failure requires replacement at the factory.

I have also encountered this problem before. I checked the power supply and it was caused by unstable power supply. I replaced the power supply and it solved the problem. I suggest you also check the power supply. Good luck to you!

The motherboard is not running properly. Please check if the RUN indicator light on the motherboard is flashing normally.

Check if the connecting wires between the panel and the motherboard are correct or if they are damaged