The jack may have gotten damaged or disabled. Try going into the control panel, and take a look at your audio properties and see if the sound card is recognized. If it is and the jack does not work try some USB speakers.Not knowing the specifics of your device, you might even have a Bluetooth option and be able to go wireless. We would need more specs on what you are using as in is this a phone, tablet, laptop or desktop unit. The make and model would be a plus as well.