Suddenly my MBP2011 keyboard lights went out & no volume I've tried recovery of Lion & resetting nvram to no avail! Please help me!

     My 2011 MBP keyboard lights & I have no volume. I've tried Command R to attempt recovery of Lion and reset the nvram. I really need help on this folks and would appreciate any sugestions. Thanks!

Reset SMC.     http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
If this does not help, contact Apple.
Best.

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