I was able to get my PC working again by draining the batter (my mouse has a light on it, but it took a few days). Everything seems to be working fine now.
I got a refurbished M15 R6 back in December. Today (February 26) it has refused to turn on. The LED panel on the back of the screen is blank, as is the Alienware logo by the keyboard, which leads me to think the battery is empty. I have tried holding the power button for 40 seconds, and holding the power button + FN for 40 seconds, but to no avail. Do I need to get a tech to take a look at it? There's a similar thread that indicates yes, I will need one, but I was wondering if anyone had something to add before I call. Thread in question is here.  
m15 R6, not powering on, #2