Sound Issues On Laptop.

[Nova]

This may sound daft or rather obvious, but some laptops have a volume control on the side of the case, I know a lot of Toshiba models do, you haven't accidentally set the control to zero?????

​

If the control was set to zero, i wouldnt be getting sound out of my headphones.

 

[Fishbong]

The Laptop recognizes the presence of a headphone plug via a lil´ pin inside the headphone connector. Maybe the pin got stuck and your laptop now thhinks you have headphones inserted all the time. Try plugging a headphone jack in and out repeatedly.
Apart from that, laptop speakers are crap anyway, so why bother?