My 990 all the sudden reverted to Dolby Headphone for all sound and I there is no sound through the speakers. When you go into the menu on the 990 surround it is set to Dolby Headphone on all inputs and it will not let me change it. On the remote you can not set up any of the surround modes, it just shows dolby headphone. I assume it is some type of software glitch but wondered if anybody had this happen to them before. Any help appreciated.