I have a VSX-C300 AV Receiver. The problem is that no matter what input I have selected, every now and then it will switch over to the Tuner input of its own accord. The word "OTHER" also appears in the display. I have tried removing the batteries from the remote and other remotes in the room in case they are interfering with the unit, but this does not solve the problem - the unit still switches itself over without warning. When it happens in the middle of a DVD its very annoying. Any suggestions? I'll post more set-up details if needed.