turns off after about five minutes of use.
I have the same problem. my xbox 360 slim turns off after about five minutes of use. I have replaced the power supply which has not fixed the issue. i can confirm tha the light on the power supply turns orange, i think, though it maybe red. i understand if it is red then this indicates the power supply is at fault.
to get the xbox to start again i need to unplug the power cord from the back of the xbox then push it back in. then i get another five minutes of use!
i can also confirm that i have tried clearing out the vents on the xbox and i have checked and the fan is spinning.
please any more ideas? this is frustrating!