My laptop speakers stops working

Hello folks,
My Dell laptop Inspiron 1545's speakers stopped working. Last week when I planned to watch a movie in my laptop, I found that there was no sound coming from the speakers. I thought the movie itself had no sound or maybe it was on mute. But it was not. I tried playing music and playing games but there is no sound coming from the speaker.
What seems to be the problem with my laptop? Will someone help me ASAP? I am getting frustrated, I can't chat with my friends without using a headset.
Thanks bros.
