The rsod comes from a bad area of flash. This can be causedby a number of things. On a cechL model, it is more often than not a bad nor chip, which isn't fixable without replacing the nor itself, which is no easy feat. If you get rsod on any console you can try to fix it with the lvl2diag rsod fix they have out, which just summons the system to rewrite the area of the nor that is corrupt. Sometimes it fixes it for good, but if it is a bad sector of the nor, then it will come back. In that case, the fix may last for a hour or it may last a month, or it may not fix it at all. Oh, and 7 out of 7 chechL models have had rsod, but don't worry....they all had rsod when I bought them so it isn't like I had 7 console crap out to rsod. They where bought that way. Lol.