Well what a chuffing pain in the rear, i think i might of blown my amp. The problem occured while i was watching a DVD, Buffalo Soldier if you care, when there was a loud bang as a petrol station blew up in the film and right after that there was no sound. Ok the details. The amp in question is a Sony STR-DB930. After the loss of sound i checked for burning smoke and fumes and i detected none.Next i checked all of my sources to see if the dvd player was to blame but everything turned up a blank even the test tones. After that i checked the speakers through my hifi amp and they do work. When i lost sound i was listening with the volume dial at about 10 o'clock if that helps at all. I've currently got the amp turned off, it has been on now permantly for about 4 months and used about 4-6 hours a day roughly. If anyone has any suggestions or ideas of what i can do to route out the problem and hopefully fix it i would really be gratefull . Thanks in advance for any help and spending time reading my dilemma.