My xbox will work fine on the dashboard, but as soon as i start a game it crashes 20 seconds later. also when this happens the xbox and the power brick turns off(light is not on). i know its not a power issue because i can leave the xbox on the dashboard for hours but if i was to start a game it would shut off. all my games are downloads and i think it might be the problem with the xbox trying to load up the game and casing it to crash.
If you had a similar problem and fixed it let me know how because this is very annoying.
feel free to ask for more details
had my xbox for more than a year and my warranty has ended