Check the obvious stuff first -- is the speaker cable plugged into the proper jack on the back of the PC? There's often 3, with only one being the right one. And also check the volume isn't muted.
Someone put their version of Windows on my computer and it wouldn't validate it (obviously!) I have bought a genuine Windows XP and installed it but have no sound. The volume is on and all cable connected properly.
Did you format the hard drive before installing the operating system.If you did have you reinstalled the motherboard drivers which will include drivers for sound
I have formatted before installing but I don't have the motherboard drivers disc. Can I download a driver from the internet? If so how do I find out which one I want?
I've managed to sort it now, thanks. I downloaded a sound card but then didn't know how to install it! My daughter's boyfriend sorted it for me. Thanks again for all your help.