Help with Cable Wiring Issue

Sorry if this isn't quite in the right area but I was hoping someone could help me. I live in an apartment with about 4 or 5 cable outlets. The one by my TV works. However, the one in my study, where my computer is, does not work. Right now I have to resort to setting up my modem in my bedroom (the other one that works) with a wireless router. Does anyone know what the cause of this could be, or where to look for a problem. I am not very technically savvy, but would like to try to fix the problem on my own. Thanks.

Nate