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2.2 GHz (Turbo Boost up to 3.4 GHz) or 2.5 GHz (Turbo Boost up to 3.7 GHz) quad-core Intel Core i7 processor with 6MB shared L3 cache.

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Black screen with little bit light in screen

Hello,

Suddenly my macbook pro not working as expected.

Connecting power cord auto starts the macbook but with black screen, fan running, battery being charged, no light in keyboard, backside apple logo light works. charging phone using usb cable working.

Tried smc reset and its working but pram reset not working as i am not able to see any restart or chime during pram reset.

Tried external display but it seems not connected to display.

Any help appreciated.

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Did you get your system wet at some point (liquid spill)?

If you didn’t get your system wet and you can’t get an external monitor to work I would guess the GPU has died. If you did get your system wet then you maybe facing a corrosion issue which might be repairable, The best thing here is to pull the logic board out to do a good inspection. Follow this IFIXIT guide: MacBook Pro 15" Retina Display Mid 2014 Logic Board Replacement take some pictures of anything that looks off and post them here for us to see Adding images to an existing question

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Very easy

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2 - 5 minutes
MacBook Pro 15" Retina Display Mid 2014 Logic Board Image

Guide

MacBook Pro 15" Retina Display Mid 2014 Logic Board Replacement

Difficulty:

Moderate

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30 minutes - 2 hours

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1 Comment:

Actually i was trying to build a hackintosh usb stick in my macbook pro and by mistake my macbook pro booted with the usb stick and got stuck with apple logo, i noticed it was with custom resolution like 1900x something, then as it was stuck so i did force shutdown and from then its not booting anymore. might be graphics settings changed or something ?

I will check inside if any liquid spill present and update you here.

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