This is typically caused by no signal going from your gaming console to the PGE.

In order to fix this, you should check multiple things with your system.

•Perform a display settings reset on your console. 

•Make sure your HDMI cord is plugged in both to the PGE and your system. Try switching out the cord to see if it is faulty

•Make sure the power cords fully plugged in, and that both units are on.