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Repair guides and disassembly information for the 14-inch MacBook Pro released in October of 2021, featuring Apple-designed M1 Pro and M1 Max SoCs. Model A2442.

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What are these marks on screen?

I have a MacBook Pro 14" 2021 —A2442 The customer brought in with olive oil in the screen. I ordered a $750 replacement screen and installed it without incident. Here’s what I see on the replacement screen (see photos).

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The seller says that all new screens have to calibrated; otherwise, they show these marks. First that makes no sense. Calibration affects the entire screen uniformly, not in portions or sections of the screen. Non-calibration or incorrect calibration would not explain for rectangles along the top of the screen.

Then the seller said that it looked like I had the menu bar set to the wrong translucency. But I cannot find that setting. I did, however, set the menu to disappear. When it vanishes the rectangles still remain present on the finder and various apps, multiple user profiles and on the log-in screen.

Please comment. Please cite your sources if providing arguments against the seller’s claim.

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You got a defective display! The artifacts you are seeing are scanning errors within the T-CON logic which is that small logic board that hands off of the display that sits inside the main body.

You might find altering the screens settings might reduce the effect.

BTW - Calibration is needed for the FaceTime camera and TrueTone services. I think you'll find the camera is not working if this was a virgin unit, a used unit would have been calibrated and only Apple and its service centers have access to the needed tool.

UPDATE: The artifacts are related to this generation of display as it has local dimming zones!

Sadly, this forces you to buy the part directly from Apple as you need to calibrate it which is a special online tool only available via Apple

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It seems you may be partially correct. The artifacts I believe are due to a damaged display, but the camera is working.

Calibration is an all or none adjustment. It either makes the entire screen darker or a different town, but it doesn’t make unique individual asymmetrical objects appear or disappear on the screen.

Readers please correct me, if I am mistaken.

da

@wellconnected - Calibration in the older series was only a camera thing nothing to do with your artifacts you see on the screen. I can't see that being any different in the M series systems which use the same design.

da

I work for a laptop service center and we service 250 to 300 laptops daily. We have two identical Apple A2442 laptops with crystal clear displays. If we remove and swap the two displays, they both display the distortion in the images above. When the two displays are put back on the original units, the displays again look beautiful. There must be some calibration data or something stored in the main board that makes the displays "married" to the main board somehow. Still researching to see if there is some way we can get around this, but I am betting you need to be an Apple service center to fix this. Frustrating...

da

@DCHANDLER - I just opened one of these up for someone, I stand corrected there is no T-CON board attached to the display any more fitted within the main chassis. Not sure what Apple did here. Did they integrate the T-CON logic within the main logic board or fit it within the display lid as in the older 2015 models.

Your testing leads me to believe its part of the main logic board circuitry.

da

I have the same issues. It seems Apple paired the display to the logic board.

da

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Vedi il contenuto dell'immagine:

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Correct! You need access to the special calibration software which can only be accessed via Apple or if you bought the display directly from Apple as it will be part of the parts cost to give you access the one time to calibrate the display as we have since learned.

da

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this is a problem model. you have to solder ic chips from the original to the replacement, unless you bought this from apple. do a google search on a2442 solder IC chips and you'll see what im referring to. Not doing it can cause random errors like you have and brightness too

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the latest update fixed the display problem tested with apple configurateur

da

@jawal, can you provide more info on this? Which update are you referring to? A macOS update?

da

@nhosic - I believe he was referring to the Configurator application, here’s the details on it:


- Revive or restore a Mac with Apple silicon using Apple Configurator


- How to revive or restore Mac firmware


I personally haven’t tried so please let us know if it worked for you. The next time I get a system in that needs a new screen I’ll give it a try.

da

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Follow these steps to initiate a system configuration and calibrate your new lid angle sensor. This worked for me.

https://support.apple.com/en-us/108333

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Did you purchase your display from Apple or 3rd party?

da

To replace the screen without artifacts and issues with the lid sensor, you have to get the lid angle sensor from Apple's Self-Service Repair to run system configuration and calibration. The screen doesn't have to be from Apple. It's extremely petty of Apple tbh.

tldr buy a framework laptop and stop funding companies that don't love you back

da

@nunyabeeshwack - That’s an interesting way to get around Apple’s Paywall access to the needed calibration tool, get the sensor which is cheaper and replace it with the other sourced display. Have you done this? I do wonder if Apple has this protected a bit to prevent that.

da

@danj I have done it this way, and the only reason I bothered going that route was that I read that someone was told to do that by Apple's own repair center. The only actual part that gets calibrated (which causes issues due to Apple's greediness) is the lid angle sensor. To get around the artifacts at the top of the screen, just upgrade to MacOS Sequoia 15.2 at the least. It was finally fixed in that version after a ton of pushback by independent repair.

da

@nunyabeeshwack - mmm… are we talking about the zoned backlight systems or the full panel backlight system? The zone backlight systems require the backlight calibrated (which is the case here), the angle sensor also needs calibration independently.

da

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Chris Leeds sarà eternamente grato.
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