I'm fairly new to Mac's and have had this 13" MBP since July of 2009. I've noticed that my laptop will display a black screen and will not respond until I hold the power button and then restart it. Last week I sent it to Apple repair which they had it for a week and could not duplicate the problem. So it was sent back to me un-repaired. I honestly feel as though there is something wrong because at first I thought it wasn't waking up from sleep mode. However since getting the laptop back on Friday I have be paying attention to what's going on. Since I thought it was a sleep issue, I thought if I went into the System Preferences, Energy Saver and from there I changed both the Battery & Power Adapter settings to NEVER, to keep it from going into Sleep Mode. Well after a little while the laptop will go to the black screen like I've been experiencing but why is the screen going black if I don't have it set to ever going to sleep? I've recorded a video with my iphone of what the laptop looks like and how it won't respond. Can anyone help diagnose this issue as I've already had no luck with the Apple repair center.