Are you trying to configure 3 outputs to 1 input? In other words, 3 devices to a single port on a display? If so, you need a HDMI Switch, I used to use one for my consoles, my PC, 360 and PS3 were all connected to the same monitor and port and I could switch the displays at the push of a button, or my particular switch would automatically switch to the newest incoming source whenever a device is turned on.