HELP! My Macbook Air won't power on!!

I have plugged it up and the power cord's light is green. It has ben a week and it still won't power on. What do I do now?

Were you able to find a solution... My wife's Air is doing the same thing I have tried all the KB suggestions of key combinations etc.. The power supply is green but the Macbook Air will NOT power on. Frustrated because I have a Dell laptop and never have had any problems as this Mac. So far she has had the Hard Drive fo so we replaced with a SSD $145... Then the hinges went $150... Then the LCD went $150 now it will not power on... from the looks of things it could be the Logic Board $850. There is no way I am sinking more money into this inferior product... I think Apple should be replacing this free of charge...This was all after the warranty was up...
Let me know if your problem has been resolved...
Message was edited by: MTCca

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Macbook Air won't power up after update

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Thanks to Loner T and others in that thread I linked to above, my son's Macbook Air is now working again.
Doing the following 3 times brought it back:
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Hi, I have a new 2011 MBP 15" (1.5 months old).
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How cold is cold where your MBP is? In any case take it to an Apple store or AASP. If none availanle call AppleCare.

My MacBook air won't open internet, email, photos or print,it keeps asking for my keychain login, but I don't have a login for keychain

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What's the precise text of your error message, please? (There's a few different ones I can think of that you might be getting.)

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my macbook air won't get past the white apple screen. I've tried power cycling the batter but won't help

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
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b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
Step 3
Sometimes a startup failure can be resolved by resetting the NVRAM.
Step 4
If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
Step 5
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 6
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
Step 7
If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
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If the startup process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 8
Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
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Step 9
If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.
Step 10
Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 11
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Step 12
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 13
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

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See this article:
http://support.apple.com/kb/ht3964
Find the section that applies to your computer, and follow the instructions.
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
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Hello to you all,
My Macbook Air won's boot up and upon diagnosis, i realized my startup disk is full to 99% even with 2GB Hard Disk space. It wont also enable me boot into safe mode too.
when i power up, i get this prolong gray screen which wont change screen but remain so. Infact i am handicapped.
Please help as all my work documents and project files are on this machine and i can't afford to loose them all...
Please, should you have any solution please send me the details to [email protected]
Thanks you a millionh times.
Al.

The MBA seems to cause several problems to several users on boot ups
On start up my MBA would not boot up the apple logo came on but only a blank screen appeared no fan i followed several start up recommendations but to no avail so I took the MBA to the nearest Apple repair centre again the same symptoms on start up ......very sorry sir you need a new mother board that will be $500 not feeling confidant in the product declined and was going to put it on ebay for spares.
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Hey Msazama30,
First, I would start off your troubleshooting by following the steps in this link:
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/TS2570
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Step by Step to fix your Mac
https://discussions.apple.com/docs/DOC-3353
Welcome to Apple Support Communities!
All the best,
Delgadoh

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MacBook pro won't power up! Acting asleep, black screen, fans don't fire up. Light nr catch pulsing, have taken batt out and reset but still blank screen, help!!

You may want to try this.
Solution A
Start up your MBP while pressing Option (alt)|, Command, P, R until your hear 3 chimes rather than 2 as indicated by apple. This worked for me the first time.
Solution B
Start your MBP while pressing Option (alt), Command, S
Hold until you see the computer automatic routine. When it finally stops type the following followed by "return":
fsck -fy
It will probably indicate some problem related to "pcscd.pub" (should be 16 instead of 17). I haven't figured out what this means but somewhere in the Internet i read it is related to scan cards...
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Start up your MBP while pressing option (alt), command, S
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when the routine stops type the following, each line followed by the "return" key:
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I'm very very disappointed with my 2007 MBP, it started to give me problems after 1 year. had to change the HDD and lately when I isntalled 10.5.6 it suddenly refused to start up., My previous Mac laptop (2003 866Mhz) worked for 4 years without a hitch. Ironically I've had to use it to access the internet and find solutions for my current MBP.
best of luck

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http://support.apple.com/kb/HT3964
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Good luck & happy computing!

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Welcome to Apple Support Communities
A green light means that your battery is full or that it can't be detected. If you can't start up the Mac, probably your logic board or battery aren't working.
Take the MacBook to an Apple Store or reseller to get your battery or logic board replaced. If the MacBook is in warranty, this repair will be free

HELP! My Macbook Air won't power on!!

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