So I recently bought a refurbed macbook pro (2013) 15" off ebay, and a week into using, I have had an issue twice now with i waking it up from sleep. It does not happen every time, I would say maybe one out of 20x it has occurred. The issue is that when it is asleep and I press the power button to wake it up, the backlight on the keyboard and the screen will flicker on for a sec the it all goes back off. I have included a link to a video showing this so you can see what i am talking about - (excuse the noise in the background) I do nothing differently (same amount of time holding the button, etc) every time I wake it up, yet this issue only happens sporadically. Any ideas? Should I just return it? Would a new keyboard fix this?