Radeon hd 7750 no audio

Drivers installed?
HDMI connected to what? TV?
Audio device switched in Control Panel?

The driver is installed on the desk top computer. it's the drivers that came with the installer disk. The audio in the control panel is switched.

I'm using a view sonic monitor model va721.

So you don't want audio to go to your monitor, because it has no HDMI-Input, not even spreaker. But what's the problem then? Is any audio device connected to the grafics card? Or isr your problem, that the onboard audio does not work any more?