Unmute mac book air?, Unmute mac book air?

My mac book air is stuck on mute. I cannot unmute it. No audio device could be found any more. I checked the earphone socket and cleaned it. There is no red light from ear phone socket. I restored the lion program to factory default and recovered it thought Internet. I also reset NVRAM / PRAM. No one helped.

Hopefully one of these steps should solve the problem.
1. System Preference > Sound > Output > Internal Speakers
    Highlight Internal Speakers / Headphones
    Make sure that Mute is not enabled.
2. Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".
3. Applications > Utilities > Audio MIDI Setup
    Audio Devices window
    Side Bar
    Click the Built-in Output.
    Under Mute any of the boxes checked? If so, uncheck it.

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Welcome to Apple Discussions
I believe you have a failing GPU (aka Video Card). Run AHT and see what it tells you. Do not be afraid to run it up to three times in succession if at first it does not detect an error (sometimes errors that are caused by overheating will not show up until the computer is stressed enough - repeating AHT will do that).
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I am trying to install a new ram into my mac book air and i am having trouble finding it. can anyone help me through this?

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The RAM in a MacBook Air cannot be upgraded after purchase.
https://discussions.apple.com/message/12782306#12782306

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Well I don't know anyone that closes the cove and leaves it for Hours... But try going to System Prefrences > Energy Saving > Uncheck Put Hard Disk to Sleep.

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Morning DeeHutton,
Thanks for using Apple Support Communities.
For more information on this, take a look at this article:
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http://support.apple.com/kb/ts2802
Best of luck,
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so i bought a mac book air, and i had to buy the LG portable cd drive... which is supposed to burn cds? the lg cd/dvd writer came with a cd but it wont load onto my computer when i plug the usb cord in. all i want to do is burn a cd from itunes but it says " burning software not found" but the LG cd drive says it will burn cds?? im confused please help!

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After I updated lion to 10.7.4, app store does not recognize my ID APPLE and it unable to connect me to app store in order to update/download apps? What have I to do? I have the same problem with mac mini e mac book air. Please help me!

Your advice did not help me. I also installed 10.7.4 combo but the situation is the same.
my internet connection is ok, mail is ok, but app store after 3 resets does not recognize my ID and it says "connection is not possible". Why? I have the same problem in both my mac mini late 2009 and mac book air 2010? Is it a problem of 10.7.4 update? I have to solve this problem and how can i return to 10.7.3 if my last backup was not with 10.7.3???thank you for your kind collaboration...

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If your device is discoverable, the other BT device would try (I am not sure if that would be successful). If it was, it would appear in your system preferences>Bluetooth.
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Use Bluetooth
You can wirelessly transfer files between computers—even Mac to PC—using the Bluetooth File Exchange utility. You can even browse selected devices and retrieve files remotely. For extra security, you can stipulate that only trusted devices be allowed to connect to your Mac, and 128-bit over-the-air encryption is also available
Barry
P.S. Since I have not had the issue, I have not researched this before. Thank you for making me look into BT security
Message was edited by: Barry Hemphill

Unmute mac book air?, Unmute mac book air?

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