Sound Problem with Headphone

First try the headphones in a different machine, such as an mp3 player or cd player to make sure the headphones still work.

Try going to the start button, then settings and control panel. Then select "Sounds and Audio devices" Down at the bottom you should see "Speaker settings." Click the "Advanced" button and then select stereo headphones.

Then, place the headphones into the green audio jack (or the headphone jack up front if you have them), play some music, and then gently wiggle the jack to see if some of the sound makes it into the headphones. If not, try slowly pulling the headphones out of the jack while the music is plaaying. you might find that the jack has slipped a little and may play only if your connector is slightly pulled out or more firmly pushed in. If his helps, then your audio connector is loose and you should replce the sound card. If the card is on the motherboard, you can disabled it when you put a new card in.