I've read a few posts regarding this same problem but haven't found the solution. Shortly after starting a game the X-box will turn itself off, and sometimes immediately turn itself back on. The time it does it varies from the 1st 8 minutes to being able to play for up to 18 minutes before turning off. The power box displays solid lights, green when on and yellow when off. I've cleaned the no-touch sensor and have gone so far as to cover it with a paper to eliminate shadows. When the system shuts down early it doesn't even feel hot. This has become very frustrating. Open to anymore suggestions.