S.B.
My son's actually got the Blue Ring of Death which is apparently super duper serious, but we fixed it.
You can actually google and find a lot of information about it online.
One thing you definitely have to be careful about is them overheating. When my son first got his, it overheated a lot so you need to give them a break once in a while.
My son will be home in a little while and I'll ask him about it for you.
He's had his xbox for years.