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Released in May 2020, the 13" MacBook Pro features quad-core Intel 8th generation Core i5 and i7 processors, and Intel Iris Plus 645 integrated graphics. (Model A2289/EMC3456 with two Thunderbolt 3 ports)

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Screen stays off after closing then reopening lid

Hi, i have a MPB intel 2020 that I swapped into a new topcase/new screen. i switched over the trackpad too because the A and D keys wernt working with the other trackpad as theres some link to trackpad and keys. the laptop works fine and everything is working as it should except after I close the screen and reopen it, the screen stays black. Ive heard it could be trackpad related. things i can think of are trackpad or lid open sensor. anyone have any similar problems with a solution?

Edit: just wanted to add that the macbook is for sure on, as the touchbar and keys are lit up

Update (06/14/23)

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Its this,correct? I have junkers I could use, but is there nothing else it could be other than this damage to this sensor?

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@vio777 - if the external display works then we know the video logic is good. You stated the screen does show an image and it’s only when you close the display and the reopen the screen is black. You also stated you put in a new display. So the screen is getting the video signal and the backlight is functioning.

So it’s either the hall sensor or the displays backlight cable is damaged so it fails when you reopen the lid.

And yes, that little guy is the hall sensor.

If you put things back together, passing a rare earth magnet allow the uppercase where the sensor sits should emulate the lid closing, then pulling the magnet away should allow the display to become active again. That is without moving the display from its working position. If that failed you’ve proven the lid sensor and it’s logic within the board is the issue.

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What do you see via an external display?

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everything i should see if the screen wasnt black. i dont believe its sleep neither because I can hit the power button to put it to sleep, then hitting a key will wake it back up. so its the lid sensor or something in the trackpad, cant figure it out though

@vio777 - Sorry for not responding sooner, this is a lid sensor issue for sure! Nothing in the trackpad will effect the this, you could have hit he keys on the keyboard to wake the system as well.

Yes, im assuming it is lid_sensor open. what should i do to troubleshoot or try and resolve this? i do have boarviewer for 820-01987, wondering what i need to check

@vio777 - The Hall sensor is located on the logic board on the back side. There is a small finger protruding outwards with a stand-off holding the sensor against the upper case where a magnet is sensed within the lid.

I don’t have a board view in front of me right now but I’m sure you can locate it. You may need to find a junker to get the part.

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