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Mid 2009 モデル番号A1278 / 2.26、2.53 GHz Core 2 DuoプロセッサーEMC 2326

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Greyed Out Volume Stuck On Mute

The volume button on the top of my screen is greyed out. When I use the buttons on my keyboard the volume doesn't move up or down and there is a crossed out circle under the popup. I have tried doing a PRAM reset, restarting my computer, and looking at the settings. The sound completely works when there is headphones in and there is a red light in the headphones jack. I attached a screenshot of what the volume looks like when I use the keyboard keys. Thanks in advance. UPDATE: there is no longer a red light in my headphone jack, there was about 10 minutes ago.

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This happened to me one time.

Go to System Preferences > Sound > Output > Select "Internal Speakers" and see if that works, if it doesn't, go back to Sound > Sound Effects > change Play Sound Effects Through: "Selected Output Device" to "Internal Speakers"

Hope this helps.

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no it doesn't, everything is greyed out and unalterable in the sound area

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i had the same problem. Through research found that it was a sensor in the headphone jack. I rebooted a few times; plugged headphones in and out a few times. Blew in compressed air. Then thought of seeing if some kind soul had written an app to take more control of sounds in a mac... found this https://staticz.com/soundcontrol/ ; installed the trial version and it fixed it inimmediately. Full disclosure: I'm an ordinary Joe user and in no way associated with the software company. i will probably wind up paying the $10 for the full version if cannot find a free alternative ;-

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Isabell Eckard さん、ありがとうございました！
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