I've just upgraded my graphics card to an Asus Geforce 210 and now my system has no sound.

I've ran Update Manager and the Additional Drivers utility which installed the latest Nvida driver. The graphics card is connected to my TV via a DVI-to-HDMI (DVI at the PC end) cable for the visual connection, and an audio jack from my onboard soundcard for my audio connection.

Any ideas on how to resolve this?

I ran this command

ubuntu-bug audio

And it outputted this:

You seem to have configured PulseAudio
to use the "pci-0000_05_00.1" card,
while you want output from "NFORCE -
NVidia CK804".

I've tired a bit of messing about with the audio settings but can't get anything to work.