MacBook Unibody Model A1278 Microphone Replacement

Replacing the microphone in your laptop requires the removal of the logic board.

Sections

Edit Step 1 Access Door  ¶ 

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Edit Step 1 Access Door  ¶ 

  • With the case closed, place the Unibody top-side down on a flat surface.

  • Depress the grooved side of the access door release latch enough to grab the free end. Lift the release latch until it is vertical.

Edit Step 2  ¶ 

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Edit Step 2  ¶ 

  • The access door should now be raised enough to lift it up and out of the Unibody.

Edit Step 3 Battery  ¶ 

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Edit Step 3 Battery  ¶ 

  • Be sure the access door release latch is vertical before proceeding.

  • Grab the white plastic tab and pull the battery up and out of the Unibody.

Edit Step 4 Lower Case  ¶ 

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Edit Step 4 Lower Case  ¶ 

  • Remove the following eight screws securing the lower case to the chassis:

    • One 3 mm Phillips screw.

    • Three 13.5 mm Phillips screws.

    • Four 3.5 mm Phillips screws.

Edit Step 5  ¶ 

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Edit Step 5  ¶ 

  • Using both hands, lift and remove the lower case off the upper case.

Edit Step 6 Mid Wall  ¶ 

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Edit Step 6 Mid Wall  ¶ 

  • Remove the four 10.3 mm Phillips screws securing the mid wall to the upper case.

Edit Step 7  ¶ 

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Edit Step 7  ¶ 

  • Lift the mid wall out of the upper case.

Edit Step 8 Fan  ¶ 

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Edit Step 8 Fan  ¶ 

  • Use a spudger to pry the fan connector straight up off the logic board.

  • It is useful to twist the spudger axially from beneath the fan cable wires to release the connector.

  • The fan socket and the fan connector can be seen in the second and third pictures. Be careful not to break the plastic fan socket off the logic board as you use your spudger to lift the fan connector straight up and out of its socket. The layout of the logic board shown in the second picture may look slightly different than your machine but the fan socket is the same.

Edit Step 9  ¶ 

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Edit Step 9  ¶ 

  • Remove the following three screws securing the fan to the upper case:

    • Two 5 mm Phillips screws.

    • One 7 mm Phillips screw.

Edit Step 10  ¶ 

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Edit Step 10  ¶ 

  • Lift the fan out of the upper case.

Edit Step 11 Logic Board  ¶ 

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Edit Step 11 Logic Board  ¶ 

  • In the next few steps, you will disconnect the highlighted cables which connect the logic board to the upper case.

  • Each connector is different, so the following steps will show you how disconnect each in detail.

Edit Step 12  ¶ 

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Edit Step 12  ¶ 

  • Remove the single Phillips screw securing the battery cable cover to the upper case.

  • Remove the battery cable cover from the upper case.

Edit Step 13  ¶ 

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Edit Step 13  ¶ 

  • Use a spudger to pry the battery level indicator cable connector straight up off the logic board.

Edit Step 14  ¶ 

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Edit Step 14  ¶ 

  • Disconnect the battery cable connector by pulling it straight away from the logic board.

  • If you cannot grasp the cable with your fingers, a spudger and tweezers may be helpful for removal.

Edit Step 15  ¶ 

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Edit Step 15  ¶ 

  • Using the tip of a spudger, flip up the keyboard ribbon cable retaining flap.

  • Pull the keyboard ribbon cable straight out of its socket.

Edit Step 16  ¶ 

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Edit Step 16  ¶ 

  • Use the flat end of a spudger to pry the trackpad connector straight up off the logic board.

Edit Step 17  ¶ 

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Edit Step 17  ¶ 

  • Use the tip of a spudger to flip up the locking lever to release the IR sensor ribbon cable from its socket.

  • Use the tip of a spudger to pull the IR sensor ribbon cable straight away from the logic board.

Edit Step 18  ¶ 

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Edit Step 18  ¶ 

  • Use the flat end of a spudger to pry the hard drive cable connector straight up off the logic board.

Edit Step 19  ¶ 

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Edit Step 19  ¶ 

  • Use the flat end of a spudger to pry the optical drive cable connector straight up off the logic board.

Edit Step 20  ¶ 

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Edit Step 20  ¶ 

  • Disconnect the display data cable by pulling the male end straight away from its socket.

Edit Step 21  ¶ 

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Edit Step 21  ¶ 

  • Use the flat end of a spudger to pry the subwoofer cable connector straight up off the logic board.

Edit Step 22  ¶ 

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Edit Step 22  ¶ 

  • Grab the plastic pull tab secured to the display data cable lock and rotate it toward the DC-in side of the computer.

  • Pull the display data cable connector straight away from its socket.

Edit Step 23  ¶ 

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Edit Step 23  ¶ 

  • Remove the following two screws securing the display data cable bracket to the upper case:

    • One 7mm Phillips screw.

    • One 5mm Phillips screw.

  • Remove the two 7 mm Phillips screws from the DC-in board.

  • Lift the display data cable bracket out of the upper case.

Edit Step 24  ¶ 

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Edit Step 24  ¶ 

  • If present, remove the two 4mm Phillips screws securing the bottom case clip to the upper case.

  • Lift the bottom case clip out of the upper case.

Edit Step 25  ¶ 

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Edit Step 25  ¶ 

  • Remove the two 5mm Phillips screws securing the keyboard flex bracket to the upper case.

  • Lift the keyboard flex bracket out of the upper case.

Edit Step 26  ¶ 

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Edit Step 26  ¶ 

  • Use the tip of a spudger to release the microphone from the upper case.

Edit Step 27  ¶ 

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Edit Step 27  ¶ 

  • Remove the following five screws securing the logic board to the upper case:

    • Four 3mm Phillips screws.

    • One 3.5mm Phillips screw.

  • Lift the logic board from its left edge and pull it out of the upper case.

Edit Step 28 Microphone  ¶ 

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Edit Step 28 Microphone  ¶ 

  • Deroute the microphone cable from the channel in the left speaker.

Edit Step 29  ¶ 

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Edit Step 29  ¶ 

  • Use the flat end of a spudger to pry the microphone cable connector up off the logic board.

To reassemble your device, follow these instructions in reverse order.

For more information, check out the MacBook Unibody Model A1278 device page.

Required Tools

Phillips #00 Screwdriver

$5.95 · 50+ In stock

Spudger

$2.95 · 50+ In stock

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Recommended Tools

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Comments Comments are onturn off

On my model, it seemed the top-left was 3.5mm and the bottom 4 were 3 mm.

Jim, · Reply

Is there anyway to solder the fan socket back on to the mother board? It broke off :(

Emily, · Reply

One of the screw was messed up. How can I remove it ?

sebmeunier, · Reply

had to lever the plug out horizontally one edge at a time to disconnect it. The connector is what connects the battery to the mother board

justbecos, · Reply

Which of the keyboard connection pins do i have to circuit to power on the macbook?

madfur, · Reply

When replacing the keyboard ribbon, place a rubber band between the ribbon and your spudger to get the traction for a good connection.

bkbkbk, · Reply

Trying to get this back in can be really difficult. But it works, just try and try again very patiently. After putting down the retaining flap again, pull a little bit to make sure the ribbon cable is all the way in and fixed.

Udo Schmitz, · Reply

to remove and put back the ribbon cable in its slot I use a piece of scotch tape. Easier to remove or insert the cable in the slot.

lemerise, · Reply

Awesome - thanx!!!

19quiz76,

Genious :-)!

Igor,

This will easily break, resulting in snapped pins. Will cause right speaker to not function if you don't solder them back on. I don't know how to prevent this from happening, I did just as described in step #21. I even went in from the side as shown in the photo, but probably should have gone in from opposite (RH side in photo) as that's where the pins are.

19quiz76, · Reply

This step appears to be redundant, but is actually necessary to enable removal of the microphone (later, in step 26).

This step should be clarified, because it otherwise seems un-necessary. Moving step 26 to be after this step would fix the continuity problem.

Russell Newman, · Reply

I don't have this piece on my MacBook built in early 2009.

apa, · Reply

When re-assembling everything, it is much easier to perform steps 15 & 16 before performing step 25!

Neil 9797, · Reply

Definitly!! Step 15 is basicially impossible with Step 25 and Step 7 (if you have to reseat the keyboard ribbon cable like I did [Step 15]) in place. Mine presented as dead, thankfully the battery indicator and magsafe worked. But when I reseated the keyboard cable (Step 15) I wasn't convinced so when the power butten did nothing I took a deep breath and went back in. And success was had on the second attempt (psew!).

Nick Campbell, · Reply

On my MacBook, the screw nearest the optical drive is 5mm long.

When replacing the logic board, route the DC-In cable around the front side of the aluminum post.

twisk, · Reply

When re-assembling everything, before performing step 27, it is very useful to perform part of step 23 *first*. Specifically:

- carefully replace the small DC-in boardand secure with the two 7 mm Phillips screws (step 23 yellow)

The small DC-in board is *much* easier to set in place and screw in if you do it before screwing the logic board back in place.

Neil 9797, · Reply

Correction about length of screws. The picture implies that the 3.5mm screw (orange) is the one on the right, nearest the USB ports etc. In fact it is the one on the left, nearest the fan.

Neil 9797, · Reply

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