Here we go.......................
Onkyo Press Release:
Automatic Continuous Change of Listening Modes and/or Remote Controller Commands are not accepted
06/21/11 - Models: TX-NR708, TX-NR709, TX-NR808, TX-NR1008, TX-NR3008, TX-NR5008, PR-SC5508, HT-RC270, HT-RC370
If your receiver of the above mentioned models experiences the following : Listening modes automatically change one after another. When this problem occurs most commands will not be accepted.
Please contact our Product Support Department at (800) 229-1687, option 3, to confirm that this issue exists in your receiver. If the issue exists you will be given further direction on how to have it serviced.
***This issue will be handled for you even if you are out of warranty (this only applies to US and Canada).***