EDIT: I meant to tell you guys the problem in case someone had an idea how to fix it.
Every time I turn the system on all the lights come on and it starts making internal noises, but all I get is a black screen. I checked all of the connections and that video mode on my TV and that stuff is all fine, so whatever it is the problem appears to be with the system. I've been having problems with off and on for a few months now.
Give it a light kick and swear at it.