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Can loose connections cause a MacBook Pro to display blue/pink/white

My MacBookPro was recently had its logic board replaced by an official Apple store. The Apple store said it had been fully tested with diagnostics after the repair.

Despite this, it started randomly showing blue/pink/white screens. I did SMC/NVRAM reset and clean re-install but nothing fixed it (It actually had the colored screens during the re-install).

Then after a few weeks, it suddenly stopped having this blue/pink/white screens issue (although it still occasionally gets black screens).

It stopped after I moved the laptop (normally I just leave it on the desk).

Could there be something loose that could cause this? Would a loose connection not be picked up by diagnostics if the offending part was making a connection when the diagnostics were being done?

If the loose part has indeed moved back in, then will it stay fixed?

After the blue/pink/white screens, the system usually re-starts and I get this crash report:

https://pastebin.com/t2Ed8LWy

Does that crash report have any indicators of the problem?

PS I know I can just take it back to the store. But it’s quite difficult to get to the store, and I am concerned that they won’t be able to reproduce it. So I am trying to find ways to narrow it down, so I can reproduce it for them.

I also know I recently made a similar topic about this, but this current post has extra information about crash reports and loose connections, so hopefully, it won’t be classed as spam.

Answered! View the answer I have this problem too

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Boy! You are having a hard time with this system.

The crash report points to the AMD discrete GPU failing! You’ll need to go back again to get the replacement board swapped out again with a third one.

To prove this you should be able to boot up under Safe Mode. Restart your system and press the S key, the system should bootup without error.

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Hi

At the moment taking it back to the store is probably the safest option as taking it apart may void the warranty of the repair

However

If you would like to go ahead and reseat the display connector that could be worth a shot

Here’s the guide for that

MacBook Pro 15" Retina Display Mid 2015 Display Assembly Replacement

You only need to do step 10 for reseating the display connection

There is the possibility that your logic-board has gone faulty after the diagnostic or just it just isn’t picking it up

You can run the diagnostic your self if you hold D on startup or a restart

Hopefully this helps

Any questions please ask

Thanks:-)

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@hellomacos - Did you review the crash report? If we look at the top of the stack we see the PCH driver then the PCI driver then the AMD driver (AMD7000Controller). In this case the last one in the pile is the failed process, the cascade goes up. This is a bad board or a failed repair of the logic board.

[code]dependency: com.apple.iokit.IOACPIFamily(1.4)[7E3AF027-B58C-341E-9B78-349E8ACBBCAC]@0xffffff801658d000->0xffffff801658efff[/code]

[code]dependency: com.apple.iokit.IOPCIFamily(2.9)[F4541C1C-CF87-39BB-B39E-FFF1E15F61CE]@0xffffff8016a36000->0xffffff8016a62fff[/code]

[code]Kernel Extensions in backtrace:[/code]

[code]com.apple.kext. AMD7000Controller (4.0.8)[CABAA989-435A-3987-A460-0D5EAC768D47]@0xffffff7f94a5a000->0xffffff7f94aa9fff[/code]

[code]dependency: com.apple.AppleGraphicsDeviceControl(6.5.7)[C8152975-5FE8-39BA-B5B9-8AFE4C732C02]@0xffffff7fab728000->0xffffff7fab72bfff[/code]

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@danj

That’s quite interesting!

I didn’t catch the bit about the AMD GPU amongst all the other code

Thanks for letting know about that:-)

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@danj Thanks this is super helpful! I was worried if I take it back to the store, they wouldn't be able to reproduce it (as they've been adamant that's it all been tested and the problem occurs very intermittently and is hard to reproduce). But knowing this will help a lot. Out of interest, would the logic board affect the thunderbolt ports? I find on of the thunderbolt ports works perfectly. But the other one does not work. I cannot get an ethernet connection or VGA connection from it. DVI does work, but the picture is green and fuzzy. The store said it has all been tested and it has passed their diagonsitcs, so I am again at a loss. Thanks in advance and thanks for your help so far.

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@big_smile - The logic board carry’s all of the logic so different boards can encounter different issues so you can’t link them as having the same failure.

But! The root issue maybe an AC power issue! I would get an outlet tester to make sure the outlets your gear is plugged into are properly wired and grounded. Don’t forget your Ethernet gear and the internet router.

Also check your breaker panels ground connection you should have a bare, green or yellow wire connecting to one or more grounding rods or to a copper water pipe leading out. Double check the connections are good not green with corrosion.

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@danj thanks I’ll give that a try. Although I get the issue with the blue/pink/white screens even when the Mac Book Pro is not connected to AC (and just running on battery) so would that rule the Ac out? Thanks again for all your help. I do appreciate it.

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