Introduction

Use this guide to replace a dead logic board.

  • Before proceeding, power down your machine. Close the display and lay it on a soft surface top-side down.

  • Remove the following ten screws:

    • Two 9 mm P5 Pentalobe screws

    • Eight 2.6 mm P5 Pentalobe screws

  • The special screwdriver needed to remove the ten 5-point Pentalobe screws can be found here.

These pentalobe screw sizes can't possibly be right - not even close. Should they perhaps be 0,8 mm and 1,2 mm?

Rulle Boer - Réponse

The screw sizes refer to the length of the shaft, not the diameter of the head or socket. P5 is the standard pentalobe size for all these screws, regardless of length.

I agree that the notation is a little confusing. I think it's because, with standard sized hardware like for your house, you have shaft diameter (say 1/8" or 3mm) and shaft length (say 3" or 7.5cm). So we're programmed to think of small numbers like that as diameter. But in this case, they're length.

budpegasus - Réponse

Pulling the fan cable out was terrifying but you actually just pull on the cable itself. No way to get any leverage at the connector to dislodge it. Did come out easily but like I said, scared me!

allison - Réponse

Draai de schroefjes voorzichtig los en leg ze op een stabiele plek neer en let erop dat de schroefje een verschillende lengte hebben.

bwgvanderveer - Réponse

I thought I could replace my 256 Gb SSD with 512? regards

ola m - Réponse

Do you have good Test Point Voltages? It appears there are silver colored Test points on the I/O Board. I am working on a water spill and trying to troubleshoot if both the I/O board and the Logic need replaced.

andrew - Réponse

It's probably not necessary but may be a little safer to completely discharge the old battery before replacing it.

Larry Smith - Réponse

tell a model that was not inferior to the speed of the one in the laptop.

Thank you

ilyabuhov - Réponse

Do i need to order tools separately to replace the battery i just ordered?

anne uhlir - Réponse

im looking for a Logic Board for a

Apple - MacBook Air® - 13.3" Display - Intel Core i5 - 8GB Memory - 128GB Flash Storage (Latest Model) - Silver Model: MQD32LL/A

Any help is appreciated.

Jamie Comstock - Réponse

Wedge your fingers between the display and the lower case and pull upward to pop the lower case off the Air.
  • Wedge your fingers between the display and the lower case and pull upward to pop the lower case off the Air.

  • Remove the lower case and set it aside.

There is a nub on the inside of the case which is attached to the battery. When you try to pull it open, it appears to be attached to the plastic casing of the battery, which sometimes splits. I gently unhooked the nub from the battery before removing the case fully. This seems to happen if the battery has suffered some drop damage (plastic parts broken around screws and parts of plastic frame split). Just an FYI in case your lower case doesn't pull away easily.

Jeannie Crowley - Réponse

When closing this back up make sure that the antenna cable is tucked away neatly

Gabriel - Réponse

As a precaution against accidental discharge or shock, disconnect the battery connector from the logic board. Grab the clear plastic pull tab attached to the battery connector and pull it toward the front edge of the Air to disconnect the battery from the logic board.
  • As a precaution against accidental discharge or shock, disconnect the battery connector from the logic board.

  • Grab the clear plastic pull tab attached to the battery connector and pull it toward the front edge of the Air to disconnect the battery from the logic board.

  • Be sure to pull the connector horizontally toward the battery, and not straight up from the Air, or you may damage the socket on the logic board.

The clear plastic tab is missing on mine. Whoever worked on my laptop before me seems to have ripped it off. Now what?

mjmorawski - Réponse

Use the flat end of a spudger to pry the I/O board cable connector upward out of its socket on the I/O board.
  • Use the flat end of a spudger to pry the I/O board cable connector upward out of its socket on the I/O board.

Be really careful when reconnecting the I/O board cable connector. The deep connector has a tendency to bend the pins with very little force applied. If this is the case, check to see if the gold pins are bent down, you may only see one row of gold pins vertically, or none.

They can be lifted with a flat head screwdriver bit. Gently slide the bit under the pins, this may need a small amount of pressure depending on how far they are bent down. Lever the pins back to the vertical position.

I found attempting to insert this connector was easier while holding the MacBook on a slight angle to see down the pins as I aligned the connector.

Another way to tell if the I/O connector cable is in place correctly is to run an Apple Hardware Test. Hold down the letter D while booting the mac and follow the prompts. If no issues found, you're all good.

A common error for a misconnected I/O Connector is 4SNS/1/C0000008:TS0P--124. This means the system cannot read the palm temperature sensor. Fix the cable and you're good

Ben - Réponse

Carefully peel the I/O board cable from the top of the fan.
  • Carefully peel the I/O board cable from the top of the fan.

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The following connector has an especially deep socket. Use care when disconnecting it. While gently pulling the I/O board cable upward near its connection to the logic board, use the tip of a spudger to pry upward on alternating sides of the connector to help "walk" it out of its socket.
  • The following connector has an especially deep socket. Use care when disconnecting it.

  • While gently pulling the I/O board cable upward near its connection to the logic board, use the tip of a spudger to pry upward on alternating sides of the connector to help "walk" it out of its socket.

  • Remove the I/O board cable.

This step can be skipped, not required for removing the fan.

yurkennis - Réponse

Agreed, there is no need to remove this cable.

David Robillard - Réponse

Use the tip of a spudger to carefully flip up the retaining flap on the fan cable ZIF socket.
  • Use the tip of a spudger to carefully flip up the retaining flap on the fan cable ZIF socket.

  • Be sure you are prying up on the hinged retaining flap, not the socket itself.

It is not necessary to remove the fan cable.

ezequielaceto - Réponse

It's certainly necessary to remove the fan cable, as you won't be able to remove the fan in Step 10 if you don't!

Goth70 Fuzed - Réponse

If you break the ZIF socket, it could be a bad day.... It happened to me. Not one to throw in the towel, I fashioned a hold-down with a length of paperclip held in place by the nearby screw. So far, it is working like a charm. Hopefully, it continues to work and this helps some other poor soul.

Lester Newsom - Réponse

I also haven't removed the fan cable. No need for this step IMHO. Just let the fan on the side instead of completely remove it.

David Robillard - Réponse

Trouble putting the cable back in the ZIF socket?

Get some electrical tape and cut it down the the width of the ribbon cable fold over one end to create a pull tab. Now place the tape onto the ribbon to give yourself something to pull either in or out as needed. Then you can peel off the tape.

Don't forget the unlatch the connector first!

Source: Re-connecting fan ribbon cable

Adam Banko - Réponse

Peel the rubber gasket off the adhesive on the top of the fan.
  • Peel the rubber gasket off the adhesive on the top of the fan.

Note how the “ears” of the gasket are routed

davecortesi - Réponse

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

    • One 3.6 mm T5 Torx screw

    • One 2.7 mm T5 Torx screw

    • One 3.6 mm T5 Torx screw with a short head

Lift the fan out of the upper case and carefully pull the fan ribbon cable out of its socket as you remove it from the Air.
  • Lift the fan out of the upper case and carefully pull the fan ribbon cable out of its socket as you remove it from the Air.

Would like more detail about removing the fan cable. Looks like it just pulls out to the right. I thought I ripped it off.

kennyavis81 - Réponse

On re-installation of fan cable cable no tool required - just wiggle it in from from side/above (side force aided by bend of cable)

Super easy - my first computer repair..hope all is well

paul deacon - Réponse

The ribbon connector held in the socket by a tiny square on top, which enters a square hole in the top of the socket. An xacto blade used to pry the top of the connector gently up will help release the connector.

peteragries - Réponse

This helped me no end, I agree with the people above that it's worth explaining how the ribbon cable is held in and that

it's simple to remove and reinstall. Thank you for a brilliant guide.

leesparey - Réponse

Year, from the top, the ribbon appears to be just the plastic strip. Copper connectors are on the bottom but at first glance it looks like I pulled the connector off the ribbon. Mine pulled straight out away from the connector, no upward angle needed or desired.

Allen - Réponse

Question: Is the ribbon connector a part of the fan, so that the new fan has its own ribbon connector? Apologies if this sounds trivial, but I could not tell from the wording/picture.

jerry bennett - Réponse

Disconnect the I/O board by pulling the power cable away from its socket on the logic board.
  • Disconnect the I/O board by pulling the power cable away from its socket on the logic board.

  • Pull the cable parallel to the face of the logic board toward the right edge of the Air.

You can skip the following five steps if you are just trying to remove the logic board—the I/O board can stay put, and it won’t hinder logic board removal.

Jeff Suovanen - Réponse

Pull the camera cable parallel to the face of the I/O board toward the hinge of the Air to disconnect it from its socket, using the tip of a spudger to help push the connector out of its socket.
  • Pull the camera cable parallel to the face of the I/O board toward the hinge of the Air to disconnect it from its socket, using the tip of a spudger to help push the connector out of its socket.

  • Do not lift upward on this cable as you disconnect it, as its socket may break off the logic board.

Use the corner of the flat edge of a spudger to push alternately on the metal ears to help disconnect the cable.

peteragries - Réponse

And when reinstalling, push the metal ears from behind to snap the connector back into the socket

peteragries - Réponse

Use the flat end of a spudger to pry the left speaker cable connector up and out of its socket on the I/O board.
  • Use the flat end of a spudger to pry the left speaker cable connector up and out of its socket on the I/O board.

  • Pry up from beneath the wires.

Don’t use a spludger!!!!! Use tweezers or a super thin flat head. Spludger is too thick…

Jared Thiel - Réponse

Use the tip of a spudger to flip up the retaining flap securing the microphone ribbon cable to the I/O board. Use the tip of a spudger to remove the volume button ribbon cable from its ZIF connector on the I/O board.
  • Use the tip of a spudger to flip up the retaining flap securing the microphone ribbon cable to the I/O board.

  • Use the tip of a spudger to remove the volume button ribbon cable from its ZIF connector on the I/O board.

This is throwing me for a loop. It won't fit back in. Are the volume and mic cable the same cable?

david nieto - Réponse

Use the tip of the spudger on the plastic ear at the back of the connector (the ear is on the battery side), to push the connector out of the socket.

peteragries - Réponse

This step (14) appears to use two different names for the same cable: microphone ribbon cable and volume button ribbon cable. This is confusing because the photos appear to show only a single cable being disconnected from a ZIF socket.

sjosefw - Réponse

Remove the single 4.0 mm T5 Torx screw securing the I/O board to the upper case.
  • Remove the single 4.0 mm T5 Torx screw securing the I/O board to the upper case.

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Carefully lift the I/O board from its edge nearest the logic board and remove it from the upper case.
  • Carefully lift the I/O board from its edge nearest the logic board and remove it from the upper case.

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Remove the following five screws securing the battery to the upper case:
  • Remove the following five screws securing the battery to the upper case:

    • Three 6.3 mm T5 Torx screws

    • Two 2.4 mm T5 Torx screws

Be careful when screwing in again not to overtighten, the plastic of the battery breaks easily with tightening.

Mike Dacre - Réponse

When handling the battery, avoid squeezing or touching the four exposed lithium polymer cells.
  • When handling the battery, avoid squeezing or touching the four exposed lithium polymer cells.

  • Lift the battery from its edge nearest the logic board and remove it from the upper case.

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Use the tip of a spudger or your fingernail to flip up the retaining flap on the trackpad ribbon cable ZIF socket. Be sure you are prying up on the hinged retaining flap, not the socket itself.
  • Use the tip of a spudger or your fingernail to flip up the retaining flap on the trackpad ribbon cable ZIF socket.

  • Be sure you are prying up on the hinged retaining flap, not the socket itself.

  • Pull the trackpad ribbon cable straight out of its socket toward the front edge of the Air.

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Use the tip of a spudger to flip up the retaining flap on the keyboard backlight ribbon cable ZIF socket. Be sure you are prying up on the hinged retaining flap, not the socket itself.
  • Use the tip of a spudger to flip up the retaining flap on the keyboard backlight ribbon cable ZIF socket.

  • Be sure you are prying up on the hinged retaining flap, not the socket itself.

  • Use your spudger to help pull the cable out of its socket.

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Use the flat end of a spudger to pry the right speaker cable connector up and out of its socket on the logic board.
  • Use the flat end of a spudger to pry the right speaker cable connector up and out of its socket on the logic board.

  • Pry up from beneath the cables.

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Gently push the tip of a spudger under the black plastic flap stuck to the display data cable lock to make the lock pop upward and away from the socket. While holding the lock away from the socket, use the tip of a spudger and your fingers to gently remove the display data cable from its socket. Do not pull upward on the display data cable as you disconnect it, as its socket may break off the logic board.
  • Gently push the tip of a spudger under the black plastic flap stuck to the display data cable lock to make the lock pop upward and away from the socket.

  • While holding the lock away from the socket, use the tip of a spudger and your fingers to gently remove the display data cable from its socket.

  • Do not pull upward on the display data cable as you disconnect it, as its socket may break off the logic board.

Regarding the second photo on step 22, I believe the placement of the spudger is incorrect. If the second photo's purpose is to demonstrate the placement of the spudger described in the second bullet--"...use the tip of a spudger and your fingers to gently remove the display data cable..."-- then such placement could lead to damaging the connector. View this annotated screenshot to see what I'm trying to convey: https://www.evernote.com/shard/s4/sh/1f5....

Christopher Fernandes - Réponse

I agree, I used tweezers to pull it gently and it worked beautifully

Gian Carlo -

Agree. Use tweezers.

sdcsoup -

Use the flat end of a spudger to pry both antenna cable connectors up and off their sockets on the AirPort/Bluetooth card. Use the flat end of a spudger to pry both antenna cable connectors up and off their sockets on the AirPort/Bluetooth card.
  • Use the flat end of a spudger to pry both antenna cable connectors up and off their sockets on the AirPort/Bluetooth card.

When reconnecting, how will I know which cable connects to the connectors?

Ringo CoC - Réponse

Fits oneway only. See length of the cable connectors

yuroen - Réponse

I put a small piece of red tape on the right wire to identify.

kcunningham - Réponse

Gently de-route the antenna cables from the slot cut into the logic board.
  • Gently de-route the antenna cables from the slot cut into the logic board.

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Remove the single 2.85 mm T5 Torx screw securing the SSD to the logic board.
  • Remove the single 2.85 mm T5 Torx screw securing the SSD to the logic board.

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To avoid damaging its socket, do not lift the end of the SSD excessively. Pull the drive straight out of its socket and remove it from the logic board.
  • To avoid damaging its socket, do not lift the end of the SSD excessively.

  • Pull the drive straight out of its socket and remove it from the logic board.

  • When reinstalling the SSD, be sure it is properly seated before reinstalling its retaining screw.

Warning: there may be adhesive keeping the SSD in place. i got 1 with, and 1 without, both slightly different models (but still the same model name, A1466 )

divinity76 - Réponse

Remove the six 6.3 mm T5 Torx screws securing the logic board to the upper case.
  • Remove the six 6.3 mm T5 Torx screws securing the logic board to the upper case.

Please Please Please remember to re-attach your antenna cables if you are replacing the upper case with a new or refurbished one. They have a way of slipping under the logic board.

Timothy Button - Réponse

These screws are easily stripped. If you accidentally push too hard, you will strip the screw when re-attaching. If that happens, get a pair of needle nose pliers and gently work the screw out taking care not to damage the board.

Timothy Button - Réponse

My screws were 4.xx mm

Gabe - Réponse

These screws are actually 3.6 mm T5 Torx. Please fix :)

Doc Halstater - Réponse

I’ll second this observation.

sjosefw -

When putting the logic board back, make sure the speaker wire isn't trapped under it

Shiv Sikand - Réponse

Remove the inner two 4.9 mm T8 Torx screws securing the antenna cable retainer and left clutch hinge to the upper case.
  • Remove the inner two 4.9 mm T8 Torx screws securing the antenna cable retainer and left clutch hinge to the upper case.

These are T9-sized torx screws, not T8.

Hanii Puppy - Réponse

This is good to know. I think I need to order a screwdriver set - all I have is the pentalobe and one other that came with my SSD replacement kit.

forestsprite -

I also had T9 screws on my device.

I found it helpful to loosen the 3rd screw of the hinge already a TINY bit. The screws are quite tight so it´s easier to loosen them while the case is lying flat on the surface. This procedure comes in handy in Step 34 where you have to hold the case perpendicular with one hand, while unscrewing this screw with the other hand.

wolfgang07 - Réponse

Mine were T8 screws, but I was able to use a T9 torx with pressure and that worked.

kcunningham - Réponse

Push the antenna cable retainer away slightly and remove the 3 mm T5 Torx screw securing the end of the heat sink to the upper case.
  • Push the antenna cable retainer away slightly and remove the 3 mm T5 Torx screw securing the end of the heat sink to the upper case.

"remove the 3 mm T5 Torx screw securing the end of the heat sink to the upper case" -- an optional step when detaching components from upper case for cleaning, eg after a liquid spilled to keyboard.

yurkennis - Réponse

Carefully remove the logic board assembly from the upper case, minding any cables that may get caught.
  • Carefully remove the logic board assembly from the upper case, minding any cables that may get caught.

  • Hold the antenna cables out of the way as you lift the heat sink end of the logic board out of the upper case.

On reassembly, as you seat the board in place, make sure the keyboard backlight cable is not trapped under it.

davecortesi - Réponse

Remove the single 2.9 mm T5 Torx screw securing the AirPort/Bluetooth card to the logic board.
  • Remove the single 2.9 mm T5 Torx screw securing the AirPort/Bluetooth card to the logic board.

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Slightly lift the free end of the AirPort/Bluetooth board and pull it out of its socket on the logic board. Remove the AirPort/Bluetooth board from the logic board.
  • Slightly lift the free end of the AirPort/Bluetooth board and pull it out of its socket on the logic board.

  • Remove the AirPort/Bluetooth board from the logic board.

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Remove the four 2.5 mm T5 Torx screws securing the heat sink to the logic board.
  • Remove the four 2.5 mm T5 Torx screws securing the heat sink to the logic board.

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  • If the heat sink seems to be stuck to the logic board after removing all four screws, use a spudger to carefully separate the heat sink from the faces of the CPU and GPU.

  • Remove the heat sink from the logic board.

  • When reinstalling the heat sink, be sure to apply a new layer of thermal paste. If you have never applied thermal paste before, we have a guide that makes it easy.

Arctic Silver's application guide http://www.arcticsilver.com/intel_applic... shows mobile 15 processors for 2nd generation, recommending a spread technique. But the 3-7th gen i5 only lists vertical line technique. I can find the actual processor model used in the 13" mid-2011 MBA (Core i5-2557M, found here: http://www.anandtech.com/show/4528/the-2...), but no way to correlate that to 2nd gen, 3d gen, etc.

I'm going to go with spread because it seems generally safer for laptops, but if anyone can confirm: What generation is the Core i5-2557M; and if it's later generation (3- on), is it really vertical line vs. spread?

Allen - Réponse

Allen, it's been a while since you did the repair. Have you had any problems with overheating? Or anything else that might be caused by spread vs. vertical line?

Talon -

i’m looking for a CPU under the heatsink. is that integrated onto the mobo as well??

davidjercinovic - Réponse

Logic board remains. When reassembling your logic board, be sure the rubber gasket is installed correctly. The nub on the gasket should mate with the hole cut into the logic board near the heat sink fins.
  • Logic board remains.

  • When reassembling your logic board, be sure the rubber gasket is installed correctly. The nub on the gasket should mate with the hole cut into the logic board near the heat sink fins.

  • The rubber gasket should attach to the end of the heat sink as seen in the second picture.

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Conclusion

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

36 autre(s) ont terminé cette réparation.

Andrew Optimus Goldberg

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Those connections are scary small! The speaker connections in particular are very fragile and hard to get under to lift off. One of mine came apart, but it could be reassembled by first placing the plastic connector in the socket and carefully connecting the metal terminations into it. Be careful to orient the slot in the wire termination so it is vertical to interface with the lug in the socket, if that happens to you.

I had the dreaded "3 beep" (memory failure) problem and ordered a new logic board. Only when I had the old board out did I realize there was a compatibility problem- different board versions, connectors did not match. Since I was stuck anyway, I baked my old board in the oven (325 for 10 minutes) and reassembled it all so I would not lose any parts. I was surprised to have it boot up with the old (baked) board!

feraltech - Réponse

I hate these lazy Haynes Manual type of articles that just tear down a product and give zero insight to the actual assembly. It's the type of knowledge that is just enough to be dangerous. Countless of times I've encountered that assembly IS NOT reverse of disassembly, where a specific tool or technique is required that is not covered in this lazy style of articles.

9 times out of 10, disassembly is the easy part and assembly the hard part.

vince chase - Réponse

I did not find that to be an issue with this guide, reassembly was quite easy and was just the reverse of assembly. The whole thing took by less than 90 minutes beginning to end.

Mike Dacre - Réponse

I feel that almost all assembly steps don't need repeating( a follow up reassemble step). In my opinion, assemble/reassemble steps involving a ribbon/flex cable and ZIF socket would be helpful, especially for newbies. Thats just one techs opinion. All that said, I feel the author did a fantastic job and I had no trouble removing/reinstalling my logic board and components. Thank you A. Goldberg and keep up the good work.

Pete - Réponse

Great guide! I wish I had found this before I followed the ‘tear down’ guide; hopefully I didn’t break anything doing it that way. The I/O board camera connector was the worst — it really requires quite a pull to release. It would be ideal to have a close-up showing exactly where to put the spudger tip to push. Also, the speakers were rather well glued down, but eventually did release. Pointing out where the glue point is (in the notch just before the bend on the right=hand one) would have helped me.

richshop2 - Réponse

Good guide. I swapped my logic board with it.

However, It may be improved by changing the order of the steps to get more space and carefully work.

1. Remove the battery

2. Remove the hard drive and airport card

3. Remove the left speaker (at your right when working) to access more easilly to the connection board.

4. Disconnect the connection board from logic board

5. Remove the fan

6. Work on the connection board

7. Removing right speaker helps during reassembling (a small rubber pad is under the logic board at the top left) and ease the ribons access to plug into zif connectors.

8. Work on the logic board

This may help to reassemble as this provide more room to connect small connectors and provide better access to ribons

Step 28 seems useless if you are working quietly

As a hint I used some dessert plates to hold the screws for each part. This avoids mixing them altogether

Tostaki - Réponse

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