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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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MacBook Pro 15” Retina 2012 Black screen

Hello,

since couple of days I’m having issues with the display of my MacBook.

Yesterday the boot up Apple screen was showing the loading of the os, but when it reached the login screen the screen was getting black. Even though the backlight keyboard was showing that the os was starting correctly.

Since today I only get a black screen, even tough the startup sound is correct and the backlight keyboard is working correctly.

I have tried to:

-enter safe mode

-reset smc and nvram

-reboot the system with P+R+command+option

-reboot several time

-try to enter recovery mode

-try to attach the hdmi to an external source (to be sure that the problem was not the screen)

My fear is that either the discrete or the integrate graphic card are not working correctly anymore, but in order to force the usage of one of the two I need to access macOS.

If this is the case I will have have to substitute the logic board. Do you have any suggestion to better deep these analysis?

If the logic board will have to be substituted, what do you suggest me to do? Try by myself, take it to an Icenter or buy a brand new one?

Thank you,

Giulio

Update (06/03/2019)

I just noticed this guide:

MacBook Pro 15" Retina Display Mid 2012 I/O Board Cable Replacement

How can I be sure that this might be the issue? Is there any check or analysis to be conducted? And how can exclude that is not the logic board?

thank you,

giulio

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You didn’t say what happened when you plugged in an external screen thus I’d speculate nothing changed in the pattern, partial boot and then black screen. If that’s the case, then yes, you probably have a GPU issue. If you use your Mac for professional purposes and need the discrete GPU a logic board replacement would be your best option. Otherwise you may investigate disabling the GPU and just use integrated graphics, there are several alternatives available, from primitive to sophisticated solutions, Google around and you’ll get a good picture. If you go for board replacement you can manage yourself too, just take plenty of time and patience and you’ll be fine, being concerned about mistakes is usually a sufficiently good approach. Here’s a guide, just in case:

MacBook Pro 15" Retina Display Mid 2012 Logic Board Replacement

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Hi,

When connecting the laptop to the external screen it didn’t work. At the moment the partial boot is not even working: the screen is always black.

I wanted to try to disable the discrete gpu, but I cannot since the screen is always black. Do you think it might be the IO cable?

Given the price and the risk to replace a new logic board I would rather go for a new laptop.

Thank you,

Giulio

da

@giulio12 I/O cable ? not really, screen is connected directly to the logic board, changing the I/O cable or board would very likely be just a waste of time and money. You may try a thunderbolt to Hdmi adapter to rule out I/O board and cable if you want to be 100% sure, thunderbolt ports are on the logic board itself.

da

Thank you. Then if it doesn’t work even with the thunderbolt is the logic board for sure. Correct?

da

@giulio12 A no video issue both on screen and HDMI port by experience would already be sufficient to call for faulty GPU. I'm not saying it's 100% sure it's the chip itself, there are a number of power/data lines and components in question and sometimes a simple resistor or a mosfet is enough to prevent the GPU correct functioning. But it's pretty sure it's a board issue anyways.

da

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