I have just installed a new video card on my PC, it's a Sapphire Radeon HD3450, to replace my old one which blew up a couple of months back. It works fine, but ever since I installed it, I have no sound on my PC. In Device Manager the sound card is still showing as installed and working properly. The speakers still crackle slightly if you turn up the volume, so I assume they are okay, but I don't have any sound at all.

Do you have on-board audio you can try to see if that works? If builders built buildings like programmers wrote programs, then the first woodpecker that came along would destroy civilization.

I am using onboard audio, I don't have a separate sound card (sorry if message was misleading)

Have you tried uninstalling and reinstalling your audio drivers? If builders built buildings like programmers wrote programs, then the first woodpecker that came along would destroy civilization.

Yup, tried that, no joy I'm afraid.

hmmm....nothing is muted? speakers are plugged into correct port? speaker plugs are solid? If builders built buildings like programmers wrote programs, then the first woodpecker that came along would destroy civilization.

Go to Control Panel> Sounds and Audio> Audio> sound playback Default Device. Make sure that is listed as the on board sound and not something else. Also in control panel> Sounds and Audio> sounds. Highlight a Program event and then to the right of the Sounds box click on the arrow button. You should here a Windows action sound. If you have a speaker icon in the tray by the clock double click on it. Master Volume should show. Be sure nothing is muted.