Why does caps lock light remains on when I turn off my macbook pro?

I had a problem recently come up with my MacBook Pro Early 2011 15 inch 2.0 ghz computer. The the caps lock light initiates at boot up. When I depress caps lock the light goes off but then only allows capital letters. All sybols associtated with depressing the cap button such as the "at" sign are screwed up. When I turn my computer off with safe mag attached, the caps light remains on. When I remove the safe mag, the caps light goes off. Any clues as to what is going on?
Thank you for your inputs ahead of time.
Bret

You should call AppleCare as soon as possible. 1-800-275-2273
You have 90 days of free tech support from Apple from the date of purchase.
You can return or exchange the computer within 14 days from the date of purchase.
Best.

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