Mid 2009 Model A1278 / 2.26 or 2.53 GHz Core 2 Duo processor 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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