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Black screen when MBP turned on

T

tmoney468

macrumors 6502a
Original poster
I've been diagnosing an issue with a family member's mid-2014 Macbook Pro 15", when trying to boot up normally, the screen is black and stays black.

However, if I try to boot and select Option right away, the screen comes on fine.

I think the computer has an issue with the discrete graphics card - there was an issue with a pantry moth infestation and one of the fans got ruined and I think the graphics card was damaged.

Any idea why the screen wont come on when trying to boot normally, but when I press option right after turning it on, the screen comes on?
 
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