My dj remote rc pro hdmi not working after software update

Hi there
We apologize for the inconvenience that you are encountering.
Could you please follow the steps as below:
1. Please make sure the HDMI device supports the HDMI input. Please replace the other HDMI devices(such as a display that supports HDMI input) to see if the image transmission can be outputted.
2. Please reconnect the HDMI cable and please replace the other HDMI cables.
If the connected HDMI device supports HDMI input, and the HDMI cable is also available, the DJI RC Pro is still unable to output the screen, and the probability is that the HDMI port is abnormal, kindly request you send it back for diagnosis:  https://repair.dji.com/gb/repair/index