I have a compaq laptop which has a problem. I have a cheap headphones
to listen to my Dell at work. The headphones work fine.

If I put in a DVD from the Teaching Company on the laptop it works
fine. However when I plug in the headphones, I only get the right hand
side sound.

I tried various setting in the control panel/Sound/Speakers and can't
get it to work. Before I go out and buy a newer expensive headphones,
I wondering if I am missing something.