Yeah, I agree with these guys. Check out all the codes, different motherboards have different codes. Basically you only need to know 3 of the codes though.
LONG SHORT SHORT (Bad video card or it needs reseated)
SHORT SHORT SHORT SHORT (Normally bad memory)
And lots of SHORT's is typically a bad setting if not, bad motherboard.
You don't really run into too many others. Those are the top dogs.
Scott