Dropped Mac: Randomly Sleeps Now

I dropped my Macbook Pro and dented the right back corner. Now it randomly goes to sleep while I am using it. How can I fix this? Is there a sensor located there that puts it to sleep that I can disable? I am out of apple care warranty.
Thanks!

No there are no user accessible sensors, sounds like the closed lid sensor that induces sleep mode.
Visit an Apple store genius bar and have the techs test it to see what is causing it to think the lid is closed...they can tellyou what the cost would be to fix it.

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