Sony Giga Pocket - No TV Sound

Archived from groups: microsoft.public.windowsxp.help_and_support,rec.video.desktop (More info?)

One night I went to use my Sony Giga Pocket to watch TV and I had no sound.
Althought it's been working fine, somthing obviously has changed to prevent
sound from working while watching live TV. I have a great picture but no
sound? My PC sound (Windows XP) works fine, and when I watch pre-record
(Store on HD) video using Giga Pocket, my sound works fine. I can also
record with no sound, then play it back and the sound works fine? Why does
the sound not work while watching a live TV/Cable? I've also removed and
re-installed Giga Pocket, same results.

Any suggestions, or better yet solutions, would be welcomed.

Jim