Does anyone know what this problem could be related to? I tried to turn on my Macbook Pro (2011) this morning, and it was totally unresponsive, no lights, no noises. I tried plugging it into different outlets but nothing. I tried Shift-Option-Control-Power (not that I know what that really does, but I read to try it) but nothing there either. After about 30 minutes the light on the adapter turned on, I pressed the power button, and it started up as usual. The battery was at 95%. Could this just be the first sign of impending demise of an older laptop? It has been functioning fine and has plenty of memory remaining.