unfortunatley thats your lot im afraid 3 red lights is death for a 360 your going to have to send back to microsoft there response times are not to bad so you should get it back in time for halo (hopefully)
Get it back to MS as soon as possible as they have a 25 day turnaround at the moment. My 360 has been away for a week now. If you miss the Halo 3 launch phone up and complain you may get some freebies
i had 4 red lights spinning on mine bout two weeks ago, it is still working but i had to switch it off at the mains first and leave for 5 mins. so what was this?