Originally Posted by theyhatethecans
They've got nice cheap hdmi splitters at a big on line store that offers prime that detects which device to sync to based on which device is on. If more than one device is on, you can change the switch manually.
HDMI 3-In 1-Out HDMI Auto Switch with 1.5 ft. Cable
Works pretty good.
It's not a splitter like analog cable which degrades the signal with an increasing number of 'splits': it is an hdmi switch for multiple inputs. I have a 3/1 and the signal looks absolutely perfect. $10 should do the trick.