My macbook's sound won't work - no output devices found in settings?

I've been having a lot of issues with my Macbook. It has a 2.4 GHz Intel Core 2 Duo processor and is running on version 10.6.8 Mac OS X. It asks for certification whenever surfing the web or loading websites, and always redirects to a different page. Now, the sound won't work at all - regardless of mute on/ off or sound turning up and down. I went to settings to check out the problem, and there is no output or input device listed or found on that page. I have no idea what's going on, and now, even though it's plugged in it won't charge.

First thing I would try for your sound output issue would be to reset the parameter RAM.
Best of luck.

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For sound, try the audio output port and connecting to the RCA audio input ports on your Pioneer receiver. Use something like this:
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My macbook pro is freezing/sound won't work

A few days ago my Macbook pro started freezing up and requiring a forced power off each time. Sometimes the screen would go completely white, other times the cursor would still move but the display was broken and unable to be clicked. It happens at random intervals, sometimes without me even running any programs it will freeze up and go to a blank screen. A lot of times it takes a few consecutive tries to actually restart it in the first place.
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Could someone please help me?

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My sound won't work on my ipod 5. I plugged the speakers in and it works fine. When the headphones aren't plugged in and I turn the volume up it says that they are plugged in. Please help !

my sound won't work on my ipod 5. I plugged the speakers in and it works fine. When the headphones aren't plugged in and I turn the volume up it says that they are plugged in. Please help !

- Try cleaning out/blowing out the headphone jack. Try inserting/removing the plug a dozen times or so. (this was already sugested) There is a little switch in the headphone jack that disconnects the speaker when the headphone jack is inserted.
Try the following to rule out a software problem
- Check also Settings > General > Accessibility > Hearing. Make sure that the sound balance is not set all the way to "R".
- Reset the iPod. Nothing will be lost
Reset iPod touch: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Reset all settings
Go to Settings > General > Reset and tap Reset All Settings.
All your preferences and settings are reset. Information (such as contacts and calendars) and media (such as songs and videos) aren’t affected.
- Restore from backup
- Restore to factory settings/new iPod.
- Make an appointment at the Genius Bar of an Apple store. Seems you have a bad headphone jack.
Apple Retail Store - Genius Bar
If not under warranty Apple will exchange your iPod for a refurbished one for this price. They do not fix yours.
Apple - iPod Repair price
A third-party place like the following will replace the jack for less. Google for more.
iPhone Repair, Service & Parts: iPod Touch, iPad, MacBook Pro Screens
Replace the jack yourself
iPod Touch Repair – iFixit

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So i plugged in a stereo system and when i unplugged it the sound won't work anymore unless it's plugged in? How do i fix it?

Check this document.
Error "Licensing has stopped working" | Mac OS
Try each step.
When you get to the license recovery kit, type sudo, leave a space and drag LicenseRecover.py into
the Terminal screen, then hit Enter. It should look like this:
Enter your password, but remember the cursor will not move. Just hit enter and let the script run.

My sound won't work on my ipad even though the sound is up and the button on the side is on volume? Any ideas ipad 2

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They will replace it with a refurb of like kind if the problem is deemed to be hardware related and not caused by misue. They will probably try restoring the device and troubleshoot it on their own before they replace it for you .... And I'm talking about an Apple Store here.
You should probably try this next.
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Hey saxon198
If it is just the one user account, then the next step would be to migrate the data that you have to a new user. The best method is to copy your Home Folder to an external hard drive. The next step after that is complete is to delete the user that is causing the issue. Then all you have to do is to copy your data back over. Just copy the contents of the documents folder into the new documents folder instead of replacing it. Now things that probably will not make the move unless you have iCloud or another syncing service is Contacts, Calendars and Notes. You can export those if needed. If it seems confusing or to daunting, then the next step would be to contact Apple Support for further help. I have provided a link to do so with multiple different options for you.
Isolating an issue by using another user account
http://support.apple.com/kb/TS4053
OS X: Manually migrating data from another Mac
http://support.apple.com/kb/HT6101
Contact Apple Support
https://www.apple.com/support/contact/
Regards,
-Norm G.

TS3274 Sound won't work for games

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http://support.apple.com/kb/HT4085

The turn-on sound won't Work, the computer opens ok silently??

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Restart in Safe Mode, it's possible a cache may have become corrupt.

HP 6120n Sound won't work bought replacement sound card not sure of what to do

HP 6120n - Using win 7 - Sound won't work
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Hello @4u2bu,
I understand that the audio is not working on your HP Pavilion a6120n Desktop PC running Windows 7 and you are wondering it you should install the new audio card you purchased. I would recommend that you first try the steps set out in the HP Support document: No Sound from the Speakers or Headphones (Windows 7), which has been designed to address audio issues with computers running Windows 7.
Now if the above document does not work I would suspect a driver issue and since HP does not have audio drivers for your computer running Windows 7 I would suggest you go ahead and install the new audio card as it will have the needed drivers.
I hope I have answered your question to your satisfaction. Thank you for posting on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

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It worked right after I pushed power and home button. But the sound is gone again. When I open music there is no slider for volume. The mute switch is not on, so I'm not sure what is wrong. Would u have anymore suggestions.
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Hi!
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Have you taken the steps recommended in the User Guide: restart, reset, restore?

TS1574 I have no sound on my iMac.    When I select the upper key on the keyboard or select 'output devices' in the System Preferences file, it says "no output devices found".     Any ideas as to I can turn on the sound?

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After installing Mountain Lion. Under sound, where it says select an output device, it say no output devices found and there is no sound. How do I fix this? I have reinstalled the os twice and still the same. I have also repaired permissions.

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Try resetting the PRAM and SMC...
PRAM Reset:
http://support.apple.com/kb/HT1379
SMC Reset:
http://support.apple.com/kb/HT3964
Hope this helps!

My macbook's sound won't work - no output devices found in settings?

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