After an update my MacBook Pro didn't start, All it does is beep!

Download the latest update on my MacBook Pro 13 "and restarted when the screen did not lit and began to beep, and it beeb like 9 times...what can I do to make it start! I'm desperated, I need to work!

The RAM isn't an issue - did you JUST install 10.8.3 BEFORE this happened? Nonetheless, you SHOULD be able to boot into your Recovery partition (unless it's completely hosed). Try booting into Internet Recovery - holding down the Command, option and R keys whilst booting. It will take a while for the screen to come up - you'll see a globe onscreen while you're booting from Apple servers - and use Disk Utility from there to verify and if needed repair your disk and then reinstall a fresh copy of Mountain Lion. DO NOT erase your disk.
Call back...
Clinton

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