if red rings of death try covering with lots of towles and switch it on and leave it for about 6 hours after switch off the 360 (not the power supply) and remove towles restart, warning this is a last thing to try as it can melt the caseing as it get relly hot,so take care,,,
before this i would consider asking micro soft for a new mother board or as the last one said get a nother one.
paul
April 2009