Model A1369, 1.6, 1.7, or 1.8 GHz Processor, 64, 128 or 256GB Flash Storage

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Fan died, now trackpad and keyboard won't work

Hi, I left my macbook air in my desk and when I returned, I couldn't use the trackpad and keyboard anymore. Since it was left untouched, there was no mecanical trauma (I live alone). Simply no response from keyboard and trackpad, but USB external ones, work. I did the apple hardware test and I got

 

4MOT/4/40000002 Exhaust-0

 

I searched for this error and apparently it indicates problems with the fan. I verified and I can't indeed hear or feel the fan working, so it might be dead. Is it possible that the fan died and the macbook overheated to a point in that the keyboard/trackpad connections got broke? Keyboard backlight stills on... Since it didn't occur in the middle of my usage, but just when I opened the macbook again, there's no reason for the keyboard to stop working by overheating.

 

My macbook air is from 2011, 13" and I don't have apple care, and here in Brazil the only two apple stores are too far. I can buy the fan and change it myself, but what about the keyboard? And why didn't the keyboardtrackpad problems appear in the hardware test?

 

Could you guys help me pointing the pieces that are likely to have 'desoldered' from the mainboard? Where can I see the schematics for the keyboard and mouse?

 

Thank you so much!

MacBook Air, running debian 8/windows 10

UPDATE! Here are some images. I opened the macbook, it had a lot of dust. I cleaned them from the fan and it started working again! I don't have the tools to remove the battery yet, but I can't see any alterations. Can you guys see it? Should I remove the battery anyways?

PS: now debian shows 2000rpm for the fan, it didn't show anything before

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PS: Images of the macbook without battery

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It looks right...

I've turned it on without the battery, no keyboard and trackpad. I've verified the trackpad and keyboard and no problem in their connectors.

What more can I try?

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Deck the Halls
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2 Answers

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First open it and remove the battery and check it for swelling. Leave the battery out, hook up th mag-safe adapter and boot. See if the trackpad now works an if the fan is turning. Let us know your results.

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Ok, I'll try. Are there cases in when this kind of thing can happen to the battery? Macbook works w/out battery? How can the battery affect the trackpad and keyboard? Thanks, I'm just waiting the tools to arrive so I can open it.

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Did you drop any liquid in it some time ago?

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I see swollen batteries on a weekly basis, they fail, old and brand new.

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But they affect keyboard as well?

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@rany - got a better place to start? Take a look at the expanse of that battery. Yes it could be under the keyboard. MacBook Air 13" Mid 2011 Battery Replacement

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Try this

Resetting the SMC - A MacBook with a battery you can remove.

Step 01. Shut down your Macbook.

Step 02. Unplug the Magsafe Power Adapter from your MacBook.

Step 03. Remove the battery.

Step 04. Press and hold the power button for 5 seconds.

Step 05. Release the power button after 5 seconds.

Step 06. Insert the battery and plug the Magsafe Power Adapter back in.

Step 07. Press the power button to start your MacBook.

Resetting the SMC - A macbook with a battery you can’t remove by yourself. (Built-in battery)

Step 01. Shut down your MacBook.

Step 02. Connect the MagSafe power adapter into your MacBook. If it’s already connected, leave as is.

Step 03. Press Shift + Control + Option + Power keys at the same time.

Step 04. Release all the keys from the keyboard.

Step 05. Press the power button to start your MacBook.
 
 



Resetting the PRAM (For All MacBook Laptops.)

NOTE: The Firmware Password must be turned off.

Step 01. Shut down your MacBook.

Step 02. Press and Hold Option + Command (⌘) + P + R.

Step 03. Turn on your MacBook while holding the keys (Option + Command (⌘) + P + R).

Step 04. Keep holding the keys (Option + Command (⌘) + P + R) until your MacBook restarts (You will see the grey screen appears before it restarts.)

Step 05. Release the Keys.

Step 06. If you hear the startup booting sound for the second time, that means the PRAM has been reset.

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