Thanks Springs. I will try them when I get home from out of town. On this AE1000U, the remote has 3 function keys that you can use that coordinate with 3 function settings on the AE1000U menu screen. You can set the functions on the menu to HDMI 1/2, Comp 1/2, etc and use the function keys on the remote to switch to those inputs. I figure if you can discretely select those inputs on the function screen, there should be discrete codes for each.