If the bottom right quadrant of the ring of lights circling the power button on your Xbox is flashing, this indicates that there is a video-related problem, these lights are an indication of a hardware failure, typically brought on by overheating. Too much heat coupled with poor air circulation can cause the solder joints on the CPU and GPU to warp. This disfigurement causes them to separate over time, rendering your Xbox inoperable until they are fixed. As it flashes, you see the following E74 error message: System Error, Contact Xbox Customer Support.
Fix an E74 Error on an Xbox with Help From Gadget Fix
Don’t error messages always seem to pop up at the worst times? Like right when you get a new game, or when you’re in the middle of playing with your buddies. Gadgetfix can fix the E74 error on your Xbox so you can get back to your new favorite game in no time. Just mail-in or drop off your Xbox. There’s no need to make an appointment or call ahead. When your Xbox is ready to be picked up, we’ll notify you.