System was setup and working fine. Now nothing. Had some guests over and someone played with the remote. Now the TV see's the system on HDMI13 but all I get is "No Signal". I have a Roku, Apple and Xbox and I get no signal from all of them. The all power up fine. I have checked my cables they all seem to be in order. Kind of at a loss what to do next. I cant believe that hitting the wrong button the remote would cause this. Any input would be grateful. Thx