Looking for help in resolving an issue with our sound cutting out when turning channels on our DVR. Set up includes HDMI cable from DVR to Denon and then HDMI cable from Denon to Sony XBR9 LCD TV. When using surround sound speakers, everything works fine. When using TV speakers, when you turn the channel the sound will cut out and then after about ten seconds, the TV will reboot. When the TV reboots the sound will come back on. If I hook the TV directly to the DVR, the sound works fine. Issue only occurs when using TV speakers and going through the Denon. Best buy wants me to send the Denon back under warranty. Any other suggestions? Thanks for the help.