Yesterday I noticed a problem with the DSP. I noted that the sound wasn't what it used to be so I opened the DSP to check my settings. It was set totally flat and the only available control was a button marked "Swith off". If I choose this one nothing happens. The only way to get out or do something was to hit the "Menu" button. I could imagine that this is the way DSP looks if you havn't the stereo turned on. Has anyone experienced anything like this, or am I forgetting something here???