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Late 2011 model, A1278 / 2.4 GHz i5 or 2.8 GHz i7 processor.

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Lid contact not responding

So I dismantled my Powerbook to swap keyboard and battery. When reassembled the battery indicator is dead and it seems the lid contact has lost its function i.e. the computer does not fire up when opened, nor goes to sleep when shut… I need to sleep the computer manually before shutting it. Otherwise it works fine. Where do I look for assembly lapses? Grateful for all kind answers. (Rookie)

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Let's make sure we are talking about the correct system as each series do things differently!

First do you have a PowerBook, a MacBook or a MacBook Pro these are three very different systems! Then what is the size 13" or 15" as well the year.

The easiest way to figure things out is plug in your systems S/N here: EveryMac - Lookup

Let us know what you found and then we can dive into what your issue is.

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I'm sorry, thought that was crystal clear in the header... MacBook Pro 13" Unibody Late 2011

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You stated “Powerbook” in your question so it was confusing things.

Your HDD cable carries the Hall sensor connection to the logic board

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Review this guide MacBook Pro 13" Unibody Late 2011 Hard Drive Cable Replacement

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Omg... so I see - I'm still in my powerbook days... Of course I mean Macbook. Epic typo!!! Sorry.

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