Audio Headphone problem (?)

[Kurokawa Rein]

I have a speaker installed in my cpu and it work just fine.
my computer is windows 7.
and my headphone does make sound when I plug it on my computer and work just fine with other device than my computer.
Question :
why is it only the right side of the headphone is working while the left side of it only make a static noise?
please help. I've tried everything I could find in youtube and other resource but none of them seems to have the same problem as mine

thx(y)

 

[Spykezxp]

Have you tried plugging the headphones into something else (radio, mp3 player, another computer) to see if it might just be a problem with the headphones and not the computer?

 

[Kurokawa Rein]

I did. with my ipod, phone and other computer next door. works just fine except this computer in my room.