I'm not sure what causing it, I went to go set the presets for the tuner this morning and you have to press the tools menu first and the then press preset left or right to change the preset number and then press enter. I did consider that I might of press a wrong button so I checked myself for error when this issue occurs the function buttons as in bd,dvd,cd etc, volume, receiver power, auto,direct,stereo,alc/standard,advance surround,mute and dimmer work and when I press receiver and then home menu onscreen appears, but nothing else will work. and when the power is reset everything works. that should clear up what the remote will and will not do. and thank you.