While this compaq evo n180 is plugged into the ac adapter and its booting up it will just turn off. However if we dont use the ac adapter and just boot off battery everything is honkey borey for a while at least...then later on it will eventually cut off. I cant determine whats causing it....no logs or anything just bam turns off on boot up. I only get to the screen that says boot to safe mode....normal etc. If its plugged in and I make a selection.......then bam shuts off...unplug and it boots. Any ideas?