I recently got a new HDTV and wanted to connect it to my computer. The video works fine but there is no audio. I can't even see any new devices listed in the playback devices, just the front and back audio jacks.
I have a GTS 250 with the spdif connected and latest drivers, and onboard sound on MCP61PM-HM motherboard.
I've tried going into BIOS to try and enable the spdif but didnt find anything there.
It won't list a new device because it thinks you are just connecting your sound to another audio device. Go into your sound properties and the one labeled "Speakers" should be it. Mess with that and see if you can produce anything. If not let me know.