Up until yesterday I had no problems with my Alienware laptop. Then I turned it on and now every few minutes it acts as though the charger has been unplugged even though it hasn't been. There is no error message, no visible problems with the cord or the computer, it just acts like I unplugged it. When I unplug it and plug it back in it fixes the problem, but then it happens again in a few minutes and it just happened now. I don't know if it's a problem with the cord or the computer or if I just messed up a setting somewhere.
Please help?