Hi all, I started noticing this problem about a week ago when I closed my laptop to put it to sleep. The next time I opened it, the computer failed to wake up from sleep and I would have to connect the AC adapter and hit the power button multiple times to start it up again. I understand that MBP's usually shutdown if there's not enough power, but this isn't the case. I often find that even with my laptop completely charged (I charge it overnight and the magsafe adapter shows the green, not orange, light) I still am unable to wake up the macbook from sleep, forcing me to hold down the power button multiple times in order to wake the laptop up. I brought it to an Apple Store yesterday to see a Genius guy and he ran a couple diagnostic tests and said that my battery was fine. He proceeded to delete my "sleep image" file (after stating that it was a whopping 4gb) and that fixed the problem temporarily, but now the problem has come back. Today I opened my laptop again attempting to wake it up from sleep, and running into the same problem, closed the laptop (to put it back into sleep), and found that it continued to stay awake - the sleep light was not blinking, it was constantly on like it was running programs or something. I have an appointment again at the Apple store tomorrow, but I was wondering if I could receive any troubleshooting ideas from anyone else. Thanks!