No sound device

Hello,
My operating system recentlly crash out and I took it to a repair place to have it fixed. Now, I've realized there's no sound on it, nor has there been since I got it back. When I look at the sound devices, it says "no audio device" under volumebut when it gives me the warning sounds "cling" when like i have gone out of my way. How do I fix this? I'm using windows XP sp2 and it's Laptop Toshiba satellite A105-S2194 system unit. am not a genius when it comes to fixing such, what can i do please i really need to use the sound.