I have an Onkyo TX-NR414 on latest firmware. Connected to the receiver using HDMI is an HTPC running XBMC (Asrock ION 330, XBMCBuntu, latest). I have a standard 5.1 audio system from Canton.
Yesterday I wanted to watch a movie, but the sound was gone all of a sudden. I don't think I've changed anything, either hardware or software settings. I've tried a variety of settings in XBMC itself but it had no effect whatsoever. I've also checked the receivers settings...nothing seems out of order. I switched to standard digital television to check if maybe the receiver couldn't output sound anymore, but TV works just fine (using optical audio).
I tried a different HDMI port (it has 3 inputs) and even changed the HDMI cable, but still no sound. For now, I've changed to optical audio which works just fine, But I only have 2 optical audio ports which are used by my digital television and xbox 360, so I'd rather use HDMI for this.
Anyone has an idea how I could troubleshoot this one or maybe find ut what's wrong?