No sound

Hello, My name is Jennifer.

I have a dell latitude D610, yea its few years old but i cant hear any sound from it, please someone help me, i went to the sounds setting and on the play back feature but i cant find the change the default, which i read in the forums, either way someone please help me fix this problem from step by step, email me if you can i will be really grateful, my email is sbzalim@hotmail.com