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2012년 6월 출시 / Core i7 프로세서 Turbo Boost 포함 / 최대 1 GB DDR5 비디오 RAM

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Black screen with white apple and 20 white vertical bars on wake-up

Hi ~ After my mid-2012 MacBook Pro is woke up after being unused for about a half a day or so, it shows a black screen with the regular white apple, plus a row of about 20 rounded white bars below. This stays on for about 20 seconds, then all works fine after that.

What does this indicate, please?

Thanks much in advance!

Update (11/10/2019)

Sure, Dan. Thank you

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Can you post a picture or short video so we can see what you are seeing Adding images to an existing question

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Well, that's a lot different than what I expected!

It appears the startup bar is broken into segments! Instead of a smooth bar as the different phases of the boot up process completes.

Here's what we expect on boot up About the screens on your Mac as it starts up

Which 2012 model do you have the older unibody or the newer retina version?

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It calls itself "MacBook Pro (15-inch, Mid 2012)." It's the older, non-retina model. This only happens when I'm awakening it from sleep, not when doing a full reboot.

Yesterday I zapped the PRAM, as I've heard that may help. So far, so good...

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A new condition for sure! I hadn’t seen this occur before.

If resetting the PRAM fixed it then I think its safe to say you lucked out!

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Thanks again, Dan. Will let you know if it doesn't last...

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Nope. It's back. I wonder what it could be..?

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Sadly, I'm thinking its something within the logic board that's messed up.

You'll need to find someone to fix it or just replace it.

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metalarts 이(가) 영원히 고마워 할 것입니다.
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