Have the E74 Error on your Xbox? Fix it here.
Basically all you have to do is take apart your xbox to the point where you can take out the DVD-Drive, let it sit there for about 5 minutes, and let it over heat itself to the point where 2 red lights flash from 1 red light, indicating over-heating problems, and will reset itself. Now all you have to do is turn back on your xbox, before you do this check all back cables, and whala.. You have a working xbox again. If this worked, please post here.
Resources - Towel trick without the towel, and taking apart the xbox instead.
Resources - Towel trick without the towel, and taking apart the xbox instead.