Check the camera's HDMI output settings, ensuring the resolution is set to 1080p/1080i, the HDMI information display is off, and the HDMI control is disabled.

Examine the HDMI cable for proper functionality. Connect the camera directly to a monitor to verify if the video output is normal.

Use an HDMI output from a laptop to connect to the video transmitter. Observe if the transmitter screen displays the video format correctly.