Sound not coming from mac

Used IMac speakers during a move and plugged in speakers but no sound. The preferences shows a headphone and Airplay but nothing else.
Any suggestions how to fix?
Thanks,
Don

Go step by step and test.
Hold the option key down and click the sound icon in the menu bar and select internal speakers
1. System Preference > Sound > Output > Internal Speakers
    Highlight Internal Speakers / Headphones
    Make sure that Mute is not enabled.
2.Plug in and remove the headphone.
    If you see red light in the headphone port, plug the headphone
    in and out of the port 5 or 6 times to flip the microswitch inside.
    Sound output may be stuck in the digital mode.
    Try this even if you don’t see the red light.
3. Reset PRAM. http://support.apple.com/kb/PH14222
4. Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the ppropriat method.
5. Applications > Utilities > Audio MIDI Setup
    Audio Devices window
    Side Bar
    Click the Built-in Output.
    Under Mute any of the boxes checked? If so,uncheck it.
    Option click the speaker icon, if present and select Internal Speakers.
5. Applications > Utilities > Audio MIDI Setup
    Audio Devices window
    Side Bar
    Click the Built-in Output.
    Under Mute any of the boxes checked? If so, uncheck it.
    Make sure that CH1 and CH2 volume sliders are at the middle and matched.
6. http://support.apple.com/kb/TS1574
7. System Preferences > Sound> Sound Effects
    Play sound effects through:
   Select "Internal speakers" and then back to "Selected sound output device".
8. Were trying out external speakers?
    Plug in the head phone and reset SMC.

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