Ok.. I was sitting down to show someone my contacts list... and the power button wouldn't turn on the device. I had used it before during the day and it worked fine.. but now If I push the power button the device turns off but It will not turn back on unless I push the reset button.

Ok I figured it out.. went through everything I had done,, turns out I had installed the wrong keyboard drivers.

Thanks for updating with your solution. It was exactly the same situation I was dealing with today. (In fact, I drained my battery because though the screen was turning off, my wi-fi card was not. Uninstalling the keyboard driver cured it.

yea I have two separate versions of the folding keyboard drivers and installed the wrong one.. Glad I figured it out I was really bummed.

Just purchased the dell folding keyboard and installed the drivers that came on disk - now I'm having the same problem you describe. X5 turns off, but not on and has drained the battery in the space of 1/2 day (turned off). Which keyboard driver is the correct one? Did you download new drivers from Dell?