HDMI Sound Stopped!

The Q700 has worked great: Running HDMI out to HDMI tuner to HDMI TV ... DVD picture and sound are (were) terrific, Windows Media and other players worked great.
I installed Windows 7 - still terrific for a time.
Then, quite suddenly, the sound stopped out of the HDMI (video works flawlessly). I switched out the cables . . . both worked fine in other configurations (between the received and the TV, eg), and neither fixed the sound-less problem. Plus, I didn't figure it was a cable issue since the RelTek sound continues to work with the sound meter indicating sound levels - when sound is shifted over to the HDMI in the Sound portion of the Control Panel, the meter doesn't indicate any sound passing through.
Sigh. Anyone have any suggestions??? Thanks so much...

Kris,
That is perplexing. I've not had a chance to play with the Q700 first hand, but I'll share the following experience from a Y450 / Y550 laptop with HDMI.   I found that the audio application didn't always switch well between internal audio and HDMI while a moving was playing. If I recall, I had to stop the movie, and maybe restart it when I changed from one audio source to the other.
Try making your selection to HDMI and reboot, then try again?
Meanwhile, I'll see if we have a Q700 running Win7 we can take a look at...   maybe others will have some thoughts too.
Mark
ThinkPads: S30, T43, X60t, X1, W700ds, IdeaPad Y710, IdeaCentre: A300, IdeaPad K1
Mark Hopkins
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