MacBook internal speekers not working Headphones are

I am trying to trouble shoot a Mac Book for a friend. When he attaches his headphones they work just fine. But when they are not attached his speakers don't work. When he tries to adjust the volume the translucent volume window pops up but it has a circle with a slash trough it.
I have tried rebooting and deleting preferences. Any ideas what else I can try?
Thanks

On the MacBooks, there is a small switch in the headphone jack that turns on the "digital out" option. Sounds to me like your friend's is stuck in the "on" position.
Try inserting and removing the headphones several times and/or twisting them while inserted. That should get the switch flipped back. You could also try using a toothpick.
~Lyssa

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Hi.
I have a problem where the internal speakers on the laptop just wont work, but I get sound from headphones when they are plugged in.
* The computer is less than a month old and has not been used very much.
* I think I heard sound when I installed everything for the first time.
* I'm using Windows 7. I've tried Ubuntu 10.10 and the sound from headphones worked there, but not from speakers.
* Nothing is muted.
* Every volume is at max.
* Headphones are not plugged in.
* Latest bios is installed.
* Latest sound driver is installed (I've tried all available drivers from HP and windows standard drivers, none work).
* No indication of error anywhere. The computer seems to do everything it's supposed to do, except no sound comes from the internal speakers.
* I've reset Windows with system restore, but it did not change anything.
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I have a Pavilion dm4-1162us laptop and I just had similar audio issues start today.
I had headphones plugged in to play a game and when I was finished, I unplugged my headphones, and suddenly no sound was coming out of the laptop's speakers. The sound works when I plug the headphones in again.
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I noticed throughout the ordeal, the IDT control panel looked like it detected the headphone jack as active even though nothing was plugged in.
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If you see a red light in the audio output port, then the internal switch is stuck. Insert the earphone plug a few times and see if you can trip the switch. If that fails, insert a cocktail stirrer and the like and jiggle it around inside. If that fails, take it to an Apple store and have the technicians at the genius bar do it for you.
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Hello
This issue is similar to iMac's problem with the internal microphone not working in FaceTime. In sound preferences, I have the internal microphone set for input. In FacetTme, I have Video->Microphone->Internal Microphone selected. There is no corresponding menu item for Audio (perhaps this is the problem? ). When I make a Facetime video call, I can hear the recipient, but they cannot hear me.
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Hello
This issue is similar to iMac's problem with the internal microphone not working in FaceTime. In sound preferences, I have the internal microphone set for input. In FacetTme, I have Video->Microphone->Internal Microphone selected. There is no corresponding menu item for Audio (perhaps this is the problem? ). When I make a Facetime video call, I can hear the recipient, but they cannot hear me.
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The sound on my macbook pro is not working. When I increase the sound, the icon appears as if everything is working, but no sound comes from the speakers. Earphones don't work either. I have tried a PRAM reset but at times, this doesn't even work. It's really frustrating having to restart my computer every time I want the sound to work, and even when I do that, theres a 50 50 chance of it working again. It generally happens after my laptop goes to sleep and I wake it up. Has anyone else had this problem and fixed it or even know what caused it?
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HELP!!

Hopefully one of these steps should solve the problem.
1. System Preference > Sound > Output > Internal Speakers
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2. Remove the headphone.
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    in and out of the port 5 or 6 times to flip the microswitch inside.
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3. Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
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4. Applications > Utilities > Audio MIDI Setup
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Internal speakers not working after upgrading to Maverics

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There are many possible causes for this issue. Take each of the following steps that you haven't already tried.
1. Start with the steps recommended in this support article. Don't skip any of the steps. It's the starting point for further efforts to solve the problem.
2. Run Software Update and make sure you have a fully up-to-date installation of OS X.
3. If you've installed an application called "Memory Clean" or any other third-party software that is supposed to "clean" or "purge" memory automatically, remove it according to the developer's instructions and restart. You should do that even if the software is not causing the problem, because it's useless.
4. If you've installed a software equalizer called "Boom" or anything similar, update or delete it and restart.
5. If an AirPlay device is selected for sound output from iTunes (or from other applications via third-party software such as "Airfoil"), deselect it.
6. Launch the application "Audio MIDI Setup" by entering the first few letters of its name in a Spotlight search and selecting it in the results (it should be at the top.) Select the Output tab. If the Mute boxes are checked, uncheck them. Move the Volume sliders all the way to the right.
7. If a red light is coming from the audio-out port, the internal switch is stuck in the position for digital output. You may be able to free it by inserting and removing a mini-stereo jack of the proper size. Inserting any kind of tool in the port may cause damage that won't be covered by your warranty.
If there's no red light, the switch may still be stuck in the headphone position. Try to free it the same way.
8. Disconnect all wired peripherals except keyboard and mouse, if applicable. If more than one display is connected, disconnect all extra ones. Restart and test.
9. If you have a MacBook Air, turn off Bluetooth and restart.
10. Start up in safe mode. Don't log in; just restart as usual when the login screen appears. When you do, make sure the words "Safe Boot" do not appear in the login screen. If they do, the system is still in safe mode and sound won't work.
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12. Reset the SMC.
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"Unfortunately, it doesn't provide any help for a MacBook Pro, other than indicating to call Apple Support" (sic).
Au contraire. TS1574's title and affected products are thusly:
"Troubleshooting issues with no audio from built-in speakers on Macs
Products Affected Mac mini, MacBook, MacBook Pro, iMac"
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2. Remove any external audio devices from USB, firewire, etc.
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If the volume slider is low, raise the volume.
If the above simply doesn't fix it, the issue may be a corrupted plist. Apple Support might be able to help troubleshoot the issue further, per the last step of TS1574.
I hope it gets resolved for you. Good luck.

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Hello Betty7,
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Internal mic not working after updating to 10.10.1

After updating to 10.10.1 (from 10.10) on my MacBook pro 2010 (15” screen) the internal mic is not working when using FaceTime (or Skype) and so the person on the other end of the video/audio call is unable to hear me. On my end there is a static/crackly sound during FaceTime (or Skype) connecting since the update which I believe is related to the mic problem (no sound input on Mac during FaceTime/Skype).
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I had exactly this same issue and and this workaround from Paul on another thread (Internal Mic not working for phone calls in Yosemite ) solved it :
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My imessage from my macbook pro is not working! When I send a message, it automatically displays a red exclamation point and the name of the person I am sending it to turns red. When I click on that it tells me that their number is not registered with imessage! I've sent imessages before (today even) and I don't know what happened. I think I may have messed with some preferences because I was trying to change security preferences, but maybe I accidentally clicked something I shouldn't have? I know it is me because I get the same error for every person I try to message. It works from my phone, though.

This could be a complicated problem to solve, as there are many possible causes for it. Test after taking each of the following steps that you haven't already tried. Back up all data before making any changes.
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Check the status of the service. If the service is down, wait tor it to come back up. There may be a localized outage, even if the status indicator is green.
Step 2
Sign out of iMessage on all your Apple devices. Log out and log back in. Try again to sign in.
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Restart your broadband device and your router, if different. You may have to skip this step if you don't control those devices.
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From the menu bar, select
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Take the steps suggested in this support article. If you don't understand some of the steps or can't carry them out, ask for guidance.
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From the menu bar, select
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Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
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Step 10
Boot in safe mode and log in. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including Wi-Fi on certain iMacs. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. After testing, reboot as usual (i.e., not in safe mode) and test again.
If iMessage worked in safe mode, but didn't work when you booted out of safe mode, stop here and post your results.
Step 11
Reset the NVRAM.
Step 12
Reinstall OS X.
Step 13
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Genius Bar reservation
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MacBook internal speekers not working Headphones are

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