Philips MCM720 Shelf System "speakers playing background music loudly" Questions

...background noises. Changing the surround sound settings makes no difference. I noticed there is a button on the remote that doesn't work. It's labled "CHOICE" and I have no idea what it does. Even ...

...Speakers have a loud hiss at low song volume Makes a "white noise" type sound at low music volume, or when ipod docked but not playing. Only noticable at low volume. Sound is high pitched, and has ...

...playing music loud and all of a sudden the speakers just turned off but the system was still on. is that a fault in the speakers or the system? MCM720 is one of the biggest CRAPS that Philips ever ...