I bought a 2.0 Ghz MacBook about 2.5 weeks ago and havent had any problem until about 10 minutes ago. I was working on a document with Word and was finished working and closed the lid like I normally do. I went to open the lid to continue working, when I opened the lid, the screen came on real quick and then flashed off. I couldnt do anything, I closed the lid and tried to re-open it, and the screen turned black. I ended up having to hold the power button down for a couple seconds and turn it back on. Should I be worried about this or was it just a snag? Thanks for the help!