I recently turned on my reciever to watch a movie and i started to hear a humming noise from inside the AMP*** not from the speakers. First I thought it was my TV. So I turned it off, still humming. Then I figured its the subwoofer, I turned off the sub woofer Nada. Then I put my ear to the reciever and it makes a humming noise. Is it dieing ?? Im pretty sure it never made the noise before. I checked my other older recievers and none of them hum ? any clues any one else?