Vista Ultimate, No Audio on HDMI TV

[pilotplanes]

Hello. This has worked for a long time, but suddenly it stopped. I
hook up my TV to my HP Pavilion laptop via an HDMI cable. Picture
works. Sound does not. I have Conextant sound. Yes, I chose SPDIF as
the default in the Control Panel. Yes, I un-installed and re-installed
the sound drivers. What changed since the last time this worked?
Upgraded Vista to Ultimate. HP did a BIOS update. Many Windows
updates, of course. I have been toggling things all day. Nothing
helps. Reading lots of web pages. This is a very common problem with
HDMI from computer to TV. I wonder even if this is broken more than it
works, especially with Vista Ultimate. HP cannot help. Suggestions
from anyone?

 

[pilotplanes]

It worked. You are my hero.