I worked on a Dell XPS Notebook about 2 months ago. IT suffered from severe overheating with it's P4 Prescott @3.4Ghz. I cleaned out all of the fans and changed the TIM to AS5. Yet the issue continued. We ordered a new battery, because of the recall and the issue continued. We bought a notebook cooler and the issue continued.
So about a week ago, the women I was working for called me to say that it stopped working all together and she brought it to some PC repair place and when they opened it up they found that most of the inside components were chared and melted. So, she was talking to Dell to see what they could do for her. The Notebook is past it's 1 year warranty, but, hey, they aren't supposed to melt.