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2.3GHz, 2.6GHz, or 2.7GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.7GHz) with 6MB shared L3 cache.

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Screen wont turn on after battery replacement

I have a Macbook Pro Retina Mid 2012 and I replaced the battery. After putting everything back together and verifying all items were plugged back in I charged the laptop backup. Upon pressing the power button, I get no chimes, and no screen. Its just black. The fans do start when the power button is pressed, the Caps Lock does work on the laptop as well. I dont have an external screen to test with so that makes it hard. I have tried a few resets including a SMC reset. Nothing seems to work.

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Did you get the correct display? The Mid 2012/Early 2013 use a different part (different pinouts)

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You dont have any TV screen nearby to check if the graphics unit work?

Maybe you damaged some cables trough your replacement?

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