Audio jack not working

Registration date
Saturday October 13, 2012
Last seen
October 14, 2012
The tip of my headset got stuck in mu front panel audio jack. For some days, the headset worked whenever inserted into that particular jack. but later even this did not work out. The problem is that my rear jacks are also not working. I called a engineer to sort out my problem, he first disabled the jack, but no effect, then he removed the jack and seperated it from the CPU (the front jack). But till now there is no output from the rear jack. He later formatted my disk, putting forward a statement that it is affected by virus. Sadly, even this did not sort my problem. And help on how to obtain the output will be greatly praised.
Thanks in advance.