Diagnosis
This is a failing or loose HDMI connection. The green channel data is being corrupted, often due to a bad cable, port, or a failing HDMI board in the source or projector.
How to Fix It
Swap out your HDMI cable first. Test a different source device (like a laptop) on the same projector input to isolate the problem to the cable or source.
If That Didn't Work
Try a different HDMI input on the projector. If the problem follows a specific input, that port on the projector's HDMI board may be damaged.
Heads Up
Long HDMI runs (over 25 feet) are prone to signal degradation; use an active fiber-optic HDMI cable for those distances.