Apple's 2016 revision to their laptop lineup targeted at professional users. Features a 15-inch, 2880-by-1800 Retina display, quad-core Intel Core i7, 256 / 512 GB /1 TB / 2TB storage options, 16 GB RAM, and a keyboard equipped with a Touch Bar. Released November 2016. Features Model A1707.

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MacBook Pro constantly thinks its lid is closed?

Hi there,

Ive worked for years on component level repair logic boards etc but this problem has me stumped, the machine switches on but then instantly acts as if the lid has been shut therefore going into sleep mode, the only way I can get the device to work is buy running it in clamshell mode then installing insomnia (if you haven't heard its a program that can prevent your Mac sleeping with the lid closed). I couldn't find an issue with the logic board but I again tested it with a known working one. but still nothing. then I thought they may be sensors etc in the screen so I changed that too but still nothing. What else is there ? I'm stumped. I might also add there is no sign of water damage and the machine passes diagnostics in clamshell mode.

Answered! View the answer I have this problem too

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eventually fixed this by replacing the trackpad .... very weird

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These models only activate the trackpad (allowing it to move and click) when the LID_OPEN signal goes to the trackpad; this signal is activated when both the left and right hall effect sensors detect the magnet from the screen lid (a new feature to prevent magnets accidentally setting the screen off, since old models just had one hall effect sensor).

Your trackpad likely had a small amount of corrosion which was shorting LID_OPEN to ground, which would disable the signal and turn the screen off. Something to look out for in future :)


sounds great I can only assume it was the trackpad. good to keep in mind as I could've ended up spending a lot of money lucky for me I had the parts to test it .


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You'll need to do some sleuthing! You'll need a magnet and some steel paperclips. Hopefully you can get the system to alter its state.

Take the paperclips and slide it down on the inside surface of the lid around the side and top edges they should stick to the magnets that are located on the lid. Carefully, fold down the display so you can reference the location on the uppercase when the magnets hit. Now try your magnet sliding it on the uppercase when the clips where to see if you can find the Hall effect detectors location (a wax pencil marker might help). One of the magnet locations should cause the the display to turn off. In any case it will give you an idea where to look for the hall effect sensor within the system.

If you review the older Unibody 15" hard drive cable we can see the Hall sensor (marked in Red):

Block Image

So it can be well hidden! I've not serviced this system yet so I can't tell you were its hidden.

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Yeah I understand I've got plenty of cables I can find one. apart from a trackpad replacement and the repair of water damaged boards this is the first problem I've came across with that can be solved quick, I gave something similar to your idea stated above ago but the machine will not respond to anything the second the device is on, the lid thinks its closed I had a go at absoutly gutting the machine including the horribly adheared battery and can't find anything in the top case I'm going to take a look at the hinge mechanism as this is the only other place I can think, if it helps you to answer the problem the device still switches on automatically when the lid is opened which I thought it shouldn't do if there is a sensor faulty or something.


Im going to take a look in this area too just incase its similar to the 12 inch


That would to a magnet! Not the sensor. The sensor needs to be wired back to the logic board. I wouldn't put it past Apple to do a switch-a-roo on us putting the sensor in the lid and the magnet in the uppercase! Does the location you marked appear to be a magnet?


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lewis Barker will be eternally grateful.
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