This is my best hunch for dealing with the issue, but I don't quite know how to go about correcting this. So you just connected a DisplayPort enabled monitor and your computer or laptop sound just cut off Well, heres how to fix all your DisplayPort sound problems. The two listed options are "1-digital display audio" and 2 "speakers/headphones". The other suggestion was to make sure my headphones are my default option. You should find a small 'UP ARROW' on the right part of the task bar, CLICK ON IT. Note: If you cant see the speaker icon, then its probably hidden from view. RIGHT CLICK on it, then select 'PLAYBACK DEVICES'. The drivers within this category all are updated already. Locate the 'SPEAKER ICON' on your Windows task bar. The two primary ones I saw being update your sound drivers which if I navigate to my device manager, I only see one category related to sound called "sound video and game controllers". I have already searched online and found various suggestions to fix this. I doubt its an issue with my headphone jack because I'm incredibly careful with it when I plug in and remove my headphone cords. In this video out Dell Certified Technician takes you step by step through the troubleshooting process for this problem. I have to restart my computer every time to get it to work or I have to. May be sound driver could be damage so you have to install the sound driver. 9 hours ago my headphone jack is not working correctly on my dell Inspiron 5567. Under Sound, video, and game controllers, select your sound card, open it, select the Driver tab, and select Update Driver. It's not an issue with the headphones because I have tried them on other computers and I have tried other headphones on my laptop. Open Start, enter Device Manager, and select it from the list of results. With my relatively new laptop, my headphone jack was working just fine up until a few days ago when all of the sudden for as far as I can tell, my headphone jack stopped working.