MacBook Air display problem?

The integrated graphics engine within the CPU chip uses part of the systems RAM for video RAM so what you are seeing is the corruption of the video image within the video RAM space.

Basically your RAM has a problem so you’ll need to find someone with the needed tools and parts to replace the RAM chips or I would get a replacement logic board as being the quicker path MacBook Air 13" (Mid 2012) 2.0 GHz Logic Board and here’s the guide MacBook Air 13" Mid 2012 Logic Board Replacement

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MacBook Air 13" (Mid 2012) 2.0 GHz Logic Board

$224.99

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Thank you for the answer.

Is it possible to reball the RAM? Or this is not permanent fix?

Kaspar 의 2021년 8월 2일

@kapuzta - Re-balling is the action of desoldering the chip cleaning off the old solder, then re-tinning the chip and the pads and re-soldering the chip back down.

The assumption is the solder joint failed. It's a lot of work doing each chip one by one. You really don't need to go to this length. A hot air station and a good flux is what I would go with, You still need good micro soldering skills as you can easily short out a connection. This is not a typical DIY project.

But keep in mind you are assuming a solder joint, what if the RAM chip its self failed? Now you need a replacement and you often need to replace all of them as the speed and the CAS/RAS of what Apple used for chips needs to be matched. You can't replace one with a different value.

Dan 의 2021년 8월 3일

Thank you Dan.

I have done the reflow and the macbook works well.

Hopefully it stays like that :).

Kaspar 의 2021년 8월 3일

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What does an external display show via the HDMI or mDP/TB port — Dan
And now when triwd to power on . It continues 3 beeps - that means something is wrong with RAM? — Kaspar
Thank you for the answer.

Is it possible to reball the RAM? Or this is not permanent fix? — Kaspar
@kapuzta - Re-balling is the action of desoldering the chip cleaning off the old solder, then re-tinning the chip and the pads and re-soldering the chip back down.

The assumption is the solder joint failed. It's a lot of work doing each chip one by one. You really don't need to go to this length. A hot air station and a good flux is what I would go with, You still need good micro soldering skills as you can easily short out a connection. This is not a typical DIY project.

But keep in mind you are assuming a solder joint, what if the RAM chip its self failed? Now you need a replacement and you often need to replace all of them as the speed and the CAS/RAS of what Apple used for chips needs to be matched. You can't replace one with a different value. — Dan
Thank you Dan.

I have done the reflow and the macbook works well.

Hopefully it stays like that :). — Kaspar

Andrew S @andrewsawesome 평판: 14.9k 26 15 28 · Answer 1 · 2021-08-02T14:02:38-07:00

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Andrew S @andrewsawesome

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@kapuzta Yes, 3 beeps means bad RAM.

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MacBook Air 13" Mid 2012

MacBook Air display problem?

Update (08/02/2021)

Update (08/03/2021)

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MacBook Air 13" (Mid 2012) 2.0 GHz Logic Board

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