I just got COD: black ops so put it in and play a bit of zombies with my brother then go to play online. i haven't connected my xbox to the internet in a months so predictably theres updates. the update finishes and it immediatly red rings (bottom right ring flashing) and says system error 74 i look it up on the net and apparently that means AV cable error, i change av cables and still no luck. Any ideas?