I just downloaded the recent Maverick Software Update onto my Macbook Pro 15" and when the download/reset finished, my screen was completely black and I have not been able to get it back since. Help?

My computer had been wanting to do a software update, with what I believe was the Mavericks Software, for a few weeks but I had been putting it off. When I finally decided to install the update onto my Macbook Pro 15" today, my screen went completely black and I haven't been able to get it back since. The computer still turns on, I can tell because my caps lock key still glows when I press it and my volume buttons still make sounds when I press them. However, I cannot see anything on the screen. I don't even get the grey start up screen when I reset my computer. I have tried the SafeMode Restart where you hold Shift while it is restarting and the Display Reset in which you hold Command + Option (alt) + R + P until you hear the start up noise twice, and neither have worked. Any other advice on what I can do to get my screen back without having to send my computer away to be fixed?

Try a SMC reset:
http://support.apple.com/kb/ht3964
Ciao.

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