On switching on my amp this morning there was no sound from any of the imputs CD, TV or Blu ray. Suspect my young son has maybe touched something (has done in the past), but can't get any signal at all. Amp display seems fine, I'm convinced it is something simple but after wading through the manual, I'm stumped! Only possible clue is when I was trying to change surround modes on the remote from cinema to music or STD the display said "not available". Anyone got any ideas on how to solve this problem??? Cheers!