Fan doesn't work even after I replaced it

[pacers721]

I have a mbp and I noticed a while ago that my right fan was never on. I was finally able to replace it myself today (my warranty expired a year ago), but it still won't come on. Any one have any ideas? thanks

 

[iLog.Genius]

Might be something wrong with the logic board itself. Try running the Apple Hardware Test off the install DVD and see if it flags anything.