I have the 8300HD connected to a Vizio TV with an HDMI cable (video) and to a Yamaha AV Receiver with an optical cable (audio). For at least a year since I installed my Home Theatre, everything worked fine; I always had surround sound when I turned the system on.... Not anymore. Now, every time that I turn it on, the audio setting in the 8300HD goes back to HDMI (2-channel stereo) and I have to manually change it to Dolby Digital (which involves a several steps process). Needless to say, this is very annoying.
Trying to find an explanation to the problem I found this in the manual:
"Important Note Regarding the HDMI Interface on the 8300HD:
The HDMI interface will automatically configure the audio output for a format supported by the television. Because not all TV's support a Dolby Digital input, the HDMI interface may automatically select a 2-channel stereo audio configuration instead of Dolby Digital. When the output is configured for a 2-channel audio, this configuration is carried over to the other digital audio outputs of the 8300HD.. This configuration prevents your home theatre system or Dolby Digital decoder from providing the full Dolby Digital surround sound effect.
On the 8300HD, you may override the automatic selection of audio by the HDMI interface by completing the following steps:
1. Press Setting twice on the remote control to open the General Settings Menu.
2. Press Move Up or Move Down to select the option Audio
3. Press Move Right to select Dolby Digital. This setting will send Dolby Digital audio to the HDMI, DIGITAL AUDIO OUT and OPTICAL AUDIO OUT connectors on the 8300HD".
So this kind of explains it... but I don't understand why it never happened before
! ... Did I inadvertently changed any settings that make it start happening... any ideas?