Speakers not working properly

I can look it up at home [if you guys help me out on where to find that info :x]

But I was thinking during class, would it still be a driver problem if the "green slot" in the back doesn't seem to work but the one in the front does? And the fact that the the speaker from which the green plug is coming from doesn't seem to work in the front while the other speaker does produce sound also be something?

Back slot:

- Speakers don't work
- Headphones don't work

Front slot:

- Speaker with green wire doesn't work
- Speaker w/o green wire works
- Headphones work properly