Tried both the front and back audio ports - no sound to the speakers. Tried a pair of headphones on both the front and back audio ports - no sound. So I copied a MP3 file to my phone, and I was able to hear it. So I copied a Mad Music show MP3 to my phone, and I was able to hear it there. So it looks like my audio driver program is hosed.
So now I need to get a sound card for Win7, install it and the software that comes with it, and see what happens.
YUCK!