The Laptop is an Acer Aspire One 1-431, Operating System is Windows 10, and the speakers are internal, the headphones plugged into the audio jack, and they did previously work, before it happened there was a loud scratchy sound, after it no sound came out.Need more detail. Laptop model? OS? Speakers attached how? Headphones attached to what? Did they previously work? What happened just before and just after they stopped working?
Do you have the manual? Did you check what the manual says?