Volume bar increases and decreases normally, but no sound!

I'm having a problem where I can press the button to increase and decrease the volume and the bar goes up and down accordingly. However, there is no sound whatsoever coming out of the laptop, what might the problem be?

Hopefully one of these steps should solve the problem.
1. System Preference > Sound > Output > Internal Speakers
    Make sure Mute is not enabled.
2. Remove the headphone.
    If you see red light in the headphone port, plug the headphone
    in and out of the port 5 or 6 times to flip the microswitch inside.
    Sound output may be stuck in the digital mode.
3. Reset PRAM. http://support.apple.com/kb/PH4405
4. 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".
5. Applications/Utilities/ Audio MIDI Setup.app
    Audio Devices window
    Side Bar
    Click the Built-in Output.
    Under Mute any of the boxes checked? If so uncheck it.
Best.

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How can I fix my iphone's sound I plugged it in to my radio and the sound came out fine but when I took it out the volume bar dissapered and ever seince all it says volume not available, but it work with headphones in. What can I do to fix it?

Try reset all settings.
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When I want to play music out loud the volume bar disappears and it won't play music or any sound. This sometimes happens with head phones in aswell. How do I fix it? I have tried to reset settings and wipe all the data of it but it didn't work.help!

Although you say you have let the battery drain, was it for long enough? Since nothing else that you've tried so far has worked, I suggest that you leave the iPod unplugged for at least four days, preferably a week. That way, if something is stopping the iPod from turning the screen on, then whatever it is will drain the battrey. However, since the screen isn't on, that may take longer than if the screen was on.
Then, after that time, plug the iPod into a power source and leave it alone for at least thirty minutes. Only after thirty minutes will it show any signs of life, but you should leave it until it is fully charged before trying to use it.
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Do you have your Facebook app open when this is happening? Or any other app that gets live Notifications? If so, close them when listening to music. The Notifications being pushed to your device will lower the volume momentarily as they arrive.
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I am using i phone 4s 64 gb.recently got a re furbished phone.when i check it,i can see a minute difference,volume increase and decrease bottons are alligned upside down.what i can do now?

hi there,i am raj from new zealand.i am using my i phone 4s for the past two and half years.i found a difficulty with my phone and then i called apple care and send my old phone and got a refurbished piece in the starting of this year.
and recently i noticed that the volume increase and decrease bottons are mis placed(placed upside down).
as per my concern,apple is a great organisation and this mistake is going to be a big problem to their name and business.so please some one help me out to talk to a right person to deal about it.
thanks

If there is Warranty or AppleCare, take to Apple for resolution. If no coverage, do not worry about it, the button is the same either way. Your iPhone will function perfectly.

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There is a process called Tar File Optimization that by default is scheduled to run from 2 AM to 5 AM server time. This process identifies all the orphaned data in the Tar files and deletes, there by reducing the size of the tar files on disk.
So if you are in heavy content migration mode, or moving large amounts of content between instances you can see large swings in your disk space utilization as the Tar file balloons up during the day and then shrinks back down over night. In some cases depending on how large your repository is the 3 hours allotted by default is not sufficent to complete the optimizaiton so you may not be recovering all your disk space. During normal production operations this will normally average out over time and the 3 hour window is enough. However during periods of heavy usage, especially during QA or content migration you may find that your tar files are ever increasing in size. If that happens you need pick a period of time over say a weekend and trigger the Tar File optimization to run until complete to recover as much of your disk space as possible.
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Recently, I can't get any sound from my game applications. Sound works fine with video, streaming, etc, but not my game applications. I've tried powering down and re-booting, but the sound does not return. Can anyone help me?

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Hi, has anyone encountered this problem?
Whenever I plug in earphones the volume increases or decreases without me even touching the phone. It also disconnects alot whenever the earphones are moved.
I have already updated my phone to the latest software and also did a factory reset however the problem is still there. I guess the headphone jack is broken, guess I will have to send it in for repairs

You can either return it to the place of purchase or contact Xperia care http://www.sonymobile.com/global-en/support/contact-us/
For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled. Richard P. Feynman

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Cleaning the jack with a clean dry toothbrush.
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I thought I would try getting help here before going to the apple store.

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Volume bar increases and decreases normally, but no sound!

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