I just purchased an SR606, and I have the very same problem -- I have to press the volume button many times to raise the volume. Similarly, I may have to press the mute button several times to mute the audio. Ditto turning the receiver on and off. I have noticed that every time I press a button on the remote, the red light on the remote blinks, but the red light on the receiver (indicating a signal has been received from the remote) may or may not blink. When it blinks, the action (volume is changed or muted or receiver turns on or off) is taken; when it doesn't, nothing happens. Pls let me know if you find out what is happening and how to fix it.