Hey whats up guys. I have a question cause this is a problem that is now repeating itself for the second time. I purchased an xbox a few weeks ago and sent it out to have my matrix chip installed and HD replaced. When I received it back everything was working for a few days and then I started getting error 13. It would work on/off for a few days and then finally error 16 and didnt work anymore at all. I sent it back to the place which did my installtion and had them remove the matrx and replace it with a cyclone chip <soldered> with the X2 bios <I assume its x2, when it boots it says executer2>. So now I get it back and everything works or a few days and now again Error13. My xbox is stationary, never moves, I'm 25 and there a re no kids in my house or anyone who uses the xbox besides myself. The only thing I have replaced is a power cord, I bought it at some game store and its aftermarket. Is there any way possible that the pwer cord could be causing this.