If it's under 12 months old it'll still be covered for repairs under the Applecare warranty it comes with, presuming you bought it new from a reseller.

If you tell them what you did they won't fix it, put the screen all back together and tell them you tried to turn it on and it was dead.

Find an Apple Authorised Service Provider near you and just give them a ring, they should be able to help.

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