I have a XPS M140 that has a dead screen. However, what is strange is that it is only dead after it finishes booting up. When you first turn the notebook on, you see text and get the Windows XP logo with the status bar moving side to side. But once it gets to the point where you login, the screen goes off.
Doesn't seem to be a problem with the LCD. I am able to plug in an external monitor as a workaround, but would like to try to resolve the problem.