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Blank meaning a white screen? Isn't your Mac still under the one year warranty? Give Apple a call or bring it into a Genius Bar. Making an appointment with the GB would get you faster service. If you don't have Apple Care you might be billed for the call but they would talk you through some troubleshooting steps to get your screen back up and running. If the graphic processor has failed it is covered under warranty even if the MBP warranty has expired. http://support.apple.com/kb/TS2377
Thanks, I think it might be the graphic processor. The screen is just black, there's no view or anything.
My MBP is currently out of warranty, so hopefully they will fix it for free if it's the graphic processor. I'm about to give them a call. And, hopefully the repair doesn't take weeks!
It's in repair now. It was the graphic processor. I asked Genius Bar if the camera was scrambled due to the graphic processor, and they said that it could be the issue. Luckily, the G.B. replaced my logic board. I'm still waiting for them to send back my computer. Now, I am wondering: Will the camera be clear and not scrambled? Since they claim it's fixed.
However, this baffles me: Does the i-sight camera really appear fuzzy and grainy if the logic board is unworkable?