My OS 10.6.6 MacBook has no sound output. When I click on volume (F12) I get the usual volume icon with the sound waves and underneath the icon is the icon for NO (the circle with the diagonal line through it. I cannot change it in the System Preferences. Ant thoughts?

Open System Preferences, and click on the Sound icon. Under the Output tab, make sure "Internal Speakers" is highlighted, and the "Output volume" slider is not all the way to the left.
If that is the case, take it to the Apple Store and have a technician look at it. Since you only got it a few hours ago, they'll fix any issues free of charge. (It's under warranty for a year)

Current models of MacBook have dual-phase audio out jacks that work both with electrical and optical equipment. If a headphone plug or other foreign object is inserted into the jack too firmly, or is slightly oversized, it can permanently bend the components that detect which kind of plug is inserted, or if there is no plug inserted.
There are four steps the owner can take before taking the machine in for service:
Make sure all software updates have been applied.
Check in System Preferences: Sound: Output that sound output is set to "Internal Speakers".
Use the F12 volume key to set the sound to maximum.
Reset PRAM by shutting down the MacBook, then pushing the power button to boot it and immediately holding down the four-key combination command-option-P-R until the boot chime is heard three times.
If this does not correct your problem, your logic board may need repositioning or replacement.

1
From the Taskbar located at the bottom of your computer click once on the "Volume" icon.
Uncheck the "Mute" box. If this does not resolve the issue, proceed to step 3.

2
Right click on the "Volume" icon.

3
Select "Open Volume Control."
Uncheck all of the boxes next to "Mute" in the Master Volume, Wave, SW Synth (short for synthesizer), CD Volume, Mic Volume, Line Volume and PC Beep selections. If this does not resolve your sound issue, proceed to step 6.

4
Right click on the "Volume Control" icon.

5
Select "Sounds and Audio Devices Properties."
Under the "Volume" tab, slide the "Device Volume" indicator to High.

6
Under the "Speaker Settings," click on "Speaker Volume."
Slide the "Left" and "Right" volume indicators to "High."

7
Click "OK." If this does not fix your sound issue, proceed to step 8.

8
Right click on the "Volume Control" icon.
Select "Sounds and Audio Devices Properties."
Go to the "Hardware" tab and select the "Driver" tab.

9
Make sure you are connected to the Internet and then, Click on "Update Driver."

10
After the driver has been updated, Click "OK."

11
Exit.

Thanks.

1. Yes, check to see if you have the volume up for the wave file turned up that is on the program you are using to listen to the Mp3 or sound wave with.
2. check the speaker connector/ Use another speaker that is know to be good and test. Use a set of earphone in the output jack also to test the output.
If these things are doing the same then you have failing sound card and it needs replacement.

#
Step 1

From the Task bar located at the bottom of your computer click once on the "Volume" icon.
#
Step 2

Uncheck the "Mute" box. If this does not resolve the issue, proceed to step 3.
#
Step 3

Right click on the "Volume" icon.
#
Step 4

Select "Open Volume Control."
#
Step 5

Uncheck all of the boxes next to "Mute" in the Master Volume, Wave, SW Synth (short for synthesizer), CD Volume, Mic Volume, Line Volume and PC Beep selections. If this does not resolve your sound issue, proceed to step 6.
#
Step 6

Right click on the "Volume Control" icon.
#
Step 7

Select "Sounds and Audio Devices Properties."
#
Step 8

Under the "Volume" tab, slide the "Device Volume" indicator to High.
#
Step 9

Under the "Speaker Settings," click on "Speaker Volume."
#
Step 10

Slide the "Left" and "Right" volume indicators to "High."
#
Step 11

Click "OK." If this does not fix your sound issue, proceed to step 12.
#
Step 12

Right click on the "Volume Control" icon.
#
Step 13

Select "Sounds and Audio Devices Properties."
#
Step 14

Go to the "Hardware" tab and select the "Driver" tab.
#
Step 15

Make sure you are connected to the Internet and then, Click on "Update Driver."
#
Step 16

After the driver has been updated, Click "OK."
#
Step 17

Exit.
Please rate me if this solution works for you

Thanks......Have a great time.

Please just follow the steps to fix the problem

1. Step 1 From the Task bar located at the bottom of your computer click once on the "Volume" icon.
   
2. Step 2 Uncheck the "Mute" box. If this does not resolve the issue, proceed to step 3.
   
3. Step 3 Right click on the "Volume" icon.
   
4. Step 4 Select "Open Volume Control."
   
5. Step 5 Uncheck all of the boxes next to "Mute" in the Master Volume, Wave, SW synthesizer, CD Volume, Mic Volume, Line Volume and PC Beep selections. If this does not resolve your sound issue, proceed to step 6.
   
6. Step 6 Right click on the "Volume Control" icon.
   
7. Step 7 Select "Sounds and Audio Devices Properties."
   
8. Step 8 Under the "Volume" tab, slide the "Device Volume" indicator to High.
   
9. Step 9 Under the "Speaker Settings," click on "Speaker Volume."
   
10. Step 10 Slide the "Left" and "Right" volume indicators to "High."
    
11. Step 11 Click "OK." If this does not fix your sound issue, proceed to step 12.
    
12. Step 12 Right click on the "Volume Control" icon.
    
13. Step 13 Select "Sounds and Audio Devices Properties."
    
14. Step 14 Go to the "Hardware" tab and select the "Driver" tab.
    
15. Step 15 Make sure you are connected to the Internet and then, Click on "Update Driver."
    
16. Step 16 After the driver has been updated, Click "OK."
    
17. Step 17 Exit.
    

Please rate me if this solution works for you

Thanks......Have a great time.

Go to system preferences and select sound then click on output and then choose the device for sound output usually internal speakers or headphones and at the same time at the bootom of the control panel check what level the output volume is. Hope this helps

1. Open Control Panel > Sounds and Audio Devices. 2. Click 'Advanced' Button near the bottom.
3. Select proper sound system (Quadrophonic or surround sound) according to your speaker system. 4. Click 'OK'. 5. Also check volume. 6. Double-click Volume icon in taskbar. 7. Click Options > Properties (From menu) and select 'Playback'. 8. Select all Audio components. 9. Click 'OK' 10. Increase all the volumes.
Now try playing a sound. Good Luck!

Hello,

Do you have the speaker icon on the lower right? If so, check to see if sound is "muted" (turned off) . If the sound is turned-on it will have two sound waves on the right of the icon. If muted it will have a circle with a slash added to the icon. If muted click on the icon then click the speaker in the new window. Check the sound by changing the volume - it will beep when you change the volume.

If the above did not fix the problem you need to download and reinstall the sound card driver.

Goodluck!
Ryan

Sounds like the volume is muted. Right click on the speaker icon and it should allow you to un-mute it. If that does not work, you need to download or reinstall your sound drivers. If you do not have the cd you can get the sound drivers from the apple website.

I hope this helps. Please rate.