Welcome to Valhalla: Inside the New 250GB Xbox 360 Slim
 

I own a total of five Xbox 360s. Four of them have died. Three because of the Red Ring of Death, all out of warranty. Many have had serial Xbox 360 failures, I had them in parallel.

The last revision of the Xbox 360, codenamed Jasper, was supposed to fix the infamous RRoD problem. So far my Jasper has been running fine. While Microsoft never confirmed the cause the RRoD seemed to be a result of poor cooling and manufacturing issues (either at the die/underfill level or at the solder level or both).

http://www.anandtech.com/show/3774/w...-xbox-360-slim