First, the obvious, make sure the speakers are setup properly and connected to correct port. The motherboard manual WILL discuss connecting speakers. If you do not have the manual, from
FIC.
To get any added features that sound device offers, twobits is correct, you will need to install specific drivers. However, there are standard Plug 'n' Play drivers that XP "should" load when it sees the hardware. Those PnP drivers should allow sounds,
if the device is working. Since she is using the motherboard's on-board sound device, that device must be enabled in the BIOS Setup Menu before it will work and before any sounds will be produced.
If disabled, enable it and Save and Exit. After the boot hopefully you will hear the Windows start sound.
But if it was disabled, and it worked before, then why is it disabled now? Was the BIOS reset? If not intentional, I would replace the $2 battery for a new one from your local battery/camera/watch counter. Power down and unplug the computer and open the side panel. Check to ensure the fans and heatsinks are not full of heat trapping dust. Locate the thin wafer battery on the motherboard, touch bare metal of the case to discharge any static, and pry out the battery with something non-metal, like a thumbnail. Take the old battery with you as many battery counters will recycle it - a good thing.
Do not touch the new battery with bare skin - I use a clean sock. Boot directly into the BIOS menu and make sure the drives are properly detected and identified, date and time are correct, and necessary on-board devices such as sound and Network Interface are enabled, then Save and Exit and boot normally and hope it works.
If already enabled in the BIOS, and sure connected properly, try another set up speakers.
If all else fails, cheap generic sound cards can be added very easily, and just by pass the on-board sound. That said, high quality 7.1 THX sound cards, while more expensive, can be added just as easily, and, with a set of quality speakers, provide serious ear candy too!