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I have to unplug/reconnect battery and attach magsaf to turn laptop on

To turn on my Macbook Pro I have to disconnect/reconnect battery and attach magsafe charge cable before powering on. Once it powers on I can disconnect magsafe and it holds charge fine. but once I turn it off it will not turn back on with or without the magsafe attached. I then have to repeat the above procedure to turn on every single time. Help!

This symptom is post replacing screen and keyboard as well as applying fresh thermal paste. So obviously I did something when I took it apart I simply do not know what and have not found an existing answer to this issue.

I have done spotaneous reboot (Unplug the battery and the magSafe. Press and hold the power on button for 10 seconds. Reconnect the battery and Mag-Safe.)

I have also done power on for two-three cycles while holding command+option+P+R

Any other tricks out there that can help me?

This issue is totally worth having the numbers on my keyboard work and the screen fixed. However, having the luxury of being able to power on without unscrewing the base plate unplugging/reconnecting the battery and plugging into the magsafe charge cord is something that I hope I can get back.

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Let’s get a better view of things, install this gem of an app! CoconutBattery take a snapshot of the apps main window and post it here for us to see Adding images to an existing question


sorry for the late response time on my end but i just uploaded the coconut battery screen shot.


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@bromalley22 - Sorry to tell you your battery is on its last legs! Determine battery cycle count for Mac notebooks

Let’s put this into perspective you have an old 2010 car what is the likelihood you’ve replaced the battery at least once or even twice by now?

Well just like a car battery Lithium-Ion batteries need to be replaced either from running a lot of load cycles (which is true in your case 1,499) as well as age! You’ve already replaced it once before (new battery in 2013) and you need a new one once again!

Here’s the needed part MacBook Pro 15" Unibody (Mid 2009-Mid 2010) Battery and the guide to put it in MacBook Pro 15" Unibody Mid 2010 Battery Replacement

MacBook Pro 15" Unibody (Mid 2009-Mid 2010) Battery Изображение


MacBook Pro 15" Unibody (Mid 2009-Mid 2010) Battery


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Hey Brian O’Malley,

I had a similar situation to what you are experiencing on a 2014 MacBook Air. But first I have a few questions.

What was your motive to replace the screen and keyboard. Did your computer experience any sort of liquid damage?

Also, once your computer is booted up does the power button work at all?

Does your computer show any other signs of needing an SMC reset other than the power key not working? See Apple’s list of signs at the bottom of this article: https://support.apple.com/en-us/HT201295

The MacBook Air I mentioned earlier had experienced water damage. It had the very same problems that you mention where in order to get it to boot I would have to first disconnect the battery then reconnect it then connect the MagSafe cord. At this point the computer would automatically boot up by itself.

My MacBook Air also showed signs indicative of needing an SMC reset but since the power button was broken on my computer I could not execute one. I even replaced the entire keyboard but (which on my model contains the power button) but it did not fix the power button.

It was many months later that I found out that the Trackpad ribbon cable is also responsible for carrying current for parts of the keyboard including the power button. By replacing this cable I was able to fix my power key.

It occurred to me that maybe you need to make sure that your trackpad cable is securely back in place after reassembling you computer.

If that doesn’t work, maybe its worth considering replacing the trackpad cable to see if that helps.

Here is iFixit’s link to your trackpad. (Make sure to read the product description to make sure you purchase the one that includes the cable as well since that’s what we want to replace.)

MacBook Pro 15" Unibody (Mid 2009-Mid 2012) Trackpad

I hope this info helps and if it does make sure to rate my Answer! :)

Milo Firestar

MacBook Pro 15" Unibody (Mid 2009-Mid 2012) Trackpad Изображение


MacBook Pro 15" Unibody (Mid 2009-Mid 2012) Trackpad


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Thank you, this sounds very much like the issue I am having. I will update if I am able to have success by replacing the track pad wire. Cheers!


trackpad was a no go unfortunately. I appreciate your contribution and hey I got a new trackpad out of the deal


So sorry to hear that, man! I had high hopes the trackpad cable would do the trick. Sorry it didn’t.

When you figure out the fix let me know what it was. I would love to know what the problem was!

Milo Firestar


@mfirestar - The battery is in trouble! It needs to be released. Review the CoconutBattery snapshot and Determine battery cycle count for Mac notebooks The battery has 1,500 cycles on it and the battery limit is 1,000 clearly Brian as squeezed out every electrons worth of energy out of it. And besides, when a battery get up in the stratosphere like this one it swells! So its likely pressing on the cables as well.


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Brian O'Malley будет вечно благодарен.
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