My audio jack not work in the front how to work this.

you might need to select stereo speakers
click start control panel sounds and audio,volume,advanced,speakers make sure you have selected the
(((appropriate speakers))) also audio you will find 3 drop down lists make sure you have the correct settings there also you might
open up your computer and check the the speakers plug/outlet to check the lead attached to the rear of the input plug make sure the connection is good
or you might have to clean the dust using a fine air blower from a compressor making VERY sure that there is no MOISTURE in the air line specifically around the CPU central processing unit and your sound card dust causes static to build up in a computer causing it to overheat any many other problems
be sure to wear an anti static earth strap before touching anything inside your computer
hope this helps