Mac Mini headphone jack not working
I have a mac mini. I used to have headphone plugged in and it was working fine till a couple of hrs before. Suddenly my headphone of my mac mini stopped working. I tried another speaders but no sound. Strange is that mac mini internal speaker is working fine, but not the headphone jack.
Any ideas ? Is this a software issue or headware ?
Mac mini, Mac OS X (10.7.3)