My Headphone jack isn't working for my laptop, is there anyway to fix it?

So basically if i plug anything into my head phone jack only one of the speakers of ears will work... so is it a problem with the jack or is there a way i can fix it in the control panels or somethin? Or can i fix it myslef cuz ive already sent in my laptop in before and im in school so i wont have time to send it in a while. so yeah someone get back to me aight?

Thanks