Released June 2012, Model A1278. Intel processor with Turbo Boost, Up to 512 MB DDR5 Video RAM

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MacBook Pro won't sleep or wake by closing or opening the lid

I recently rebuilt a MacBook Pro from the ground up by purchasing parts from various sources, then threw them into a unibody enclosure and told them to work (thank's iFixit for the knowhow!)

Unfortunately, the one thing that doesn't work is the sleep wake functionality from opening and closing the lid. Is there a particular component in charge of that function? Is it possible to fix without handing it over to Apple(For obvious reasons)? I am fully comfortable with whatever option the iFixit community proposes, (as I did have to build it from the ground up). Any help is greatly appreciated!

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The battery indicator is responsible for this, so it is possible you ripped the ribbon, or it is bad. Check to make sure the screen is being held shut to the palmrest, which will make sure there is a magnet in the screen lid, without this sleep functionality will not work.

Try a new battery indicator first.

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Yeah, the screen is staying shut tightly to the palmrest. It is quite possible that the battery indicator is damaged (it still displays the battery estimation, but that doesn't mean it isn't damaged). Is that the only component responsible for sleep wake functionality?


That's the component for registering that the lid has been shut, signals get sent from here to tell the Mac to sleep.

If there is no liquid elsewhere on the board or the battery connector, replacing this should fix your issue.


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One possible cause is that the sensor to detect lid opening can trigger by mistake. If so, you can disable it by going into and typing:

sudo pmset -a lidwake 0

Note that this means the Mac will no longer automatically wake when you open it. Instead you would need a key press or mouse click to wake.

If this is not helpful, then click on link below:-

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Scott Currier will be eternally grateful.
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