Repair guides for the MacBook Air, Apple's current line of consumer laptops.

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MacBook air won't boot

I tried all the steps but the only thing that the macbook does is a little "clic" near the power button after I pressed it to turn the macbook air on. The light comes up for a few seconds, then the clic, then the light off.

I tried to boot from an external usb drive with a Snow Leopard installed, but it was impossible since no boot process appears to work.

Any ideas? Thank you

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So the display doesn't come on? What did you mean by "Light" (Display or the LED at the bottom right of the chasis). Does it chime a certain number of times?

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It was a damaged logicboard

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I had a similar prob with MBA not starting after leaving it charging all night. I held down the start button for 15 secs and it came on. Go figure?

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for whatever reason, after resetting smc nvram and trying other things the screen remained black. pressing the power button for 15 s , releasing it and then pressing it again turned on the laptop, the start sound came on and mac os just booted as usual.

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I've had this problem with PC laptops that have built up static electricity and I've had to discharge them by removing the battery and pressing the power button for 10-15 seconds to discharge any build up. The best I can come up with for a Macbook Air is to reset the SMC (System Management Controller) since the battery is not easily removed. This is also listed on Apple's support site for possibly helping with your issue:

1. Turn off MacBook Air.

2. Connect the power adapter and plug it in.

3. On the LEFT side of the keyboard), hold down Shift, Option and Control.

4. With the other keys STILL HELD DOWN, press and hold the power button.

5. Wait 5 seconds, then release all keys.

6. Push power button to turn your MacBook Air back on.

Please let me know if this helped.

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I did this before posting and nothing. But I can remove the battery and try, could you think it can work?

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Maybe. I've experienced this with a Dell laptop that was seemingly DOA. Turned off comp, removed battery, discharged it by pressing power button for 10-15 seconds. Replaced battery, plugged it in, powered it up no problem. I am not sure if this would work for Macs that have batteries incased in unibody, but I don't think it could harm anything as long it's removed properly. I also have had a regular desktop do this to me, and the discharging worked.

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No way, I did disconnect the battery, power on for a few seconds, reconnect and the same thing: light for a 3 seconds, the clic sound of the hard disk, then shuts off. NO video, no startup sound. maybe the logicBoard is dead I guess....

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While I agree that it sounds very much like a potential logic board issue, it's also possible that the power supply is having issues. If the PSU stopped providing power, the connector (or cable) that attaches to the Macbook is broken, or the jack on the Macbook broke (unlikely, but possible), the battery would have kept the system running until it ran down. Assuming this is the case, then there's only enough power left in the battery to activate the power light, but as soon as other components (such as the hard drive) attempt to start, it can't provide the power and shuts down again.

I'd check the power supply to see if it's putting out the voltage it's supposed to. Then, if you know anyone else with a Macbook Air, try theirs on your system.

I hope this helps!

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Could you please show me a picture where are located the parts (power supply and the connector (or cable) that attaches to the Macbook) that you describe? Thank you

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Search Google Images for "magsafe macbook air" to see dozens of examples.

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Jerry I'm sorry, since english is not my native language, I misunderstood what you said.

I thought you was refering to an infernal part, not the magsafe. Is not the magsafe Power supply, I've tested in another macbook air and it worked perfect. Thank you

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I think the fan should be bad! You must buy a new one to change it. Otherwise your computer is very easy to bad!My MacBook air MC504LL/A is broken like this.

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Do you mean changing this part MacBook Air (Original) Fan and Heat Sink could fix the problem? Did you read the symptoms?

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Sorry this is not an answer but to say I am exactly in the same situation and far away from my local apple store in manhattan new York. I am traveling in India and my MacBook air has gone into a sleep mode and nothing is powering it up. It's almost costing me my trip as a writer! Please help. It's only 1 year old. Awam

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sheesh...gotta brand new Mac Air 13" & it just doesn't start up.. shud really give it the "boot" literally..have asked Apple to simply replace the piece..shudn't they ??

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Flavio will be eternally grateful.
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