Macbook pro has no sound, any ideas on the cause?

My macbook pro crashed while watching a video and since then has not had any sound coming from the speakers, although it did emit the startup sound when I restarted it.

One of these steps may help.
1. System Preference > Sound > Output > Internal Speakers
    Highlight Internal Speakers
    Make sure that Mute is not enabled.
2. 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.
3. Reset PRAM. http://support.apple.com/kb/PH4405
4. Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".
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.

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Hi DeathDrone,
Welcome to the HP Community! I will be happy to help with your sound problems. However, I will need some additional information to better assist you. What is your operating system? What is your product number?
Find your product number on a notebook:
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&dlc=en&docname=c00033108
Finding your OS:
http://windows.microsoft.com/en-CA/windows/which-operating-system
Thank you,
Please click “Accept as Solution ” if you feel my post solved your issue.
Click the “Kudos Thumbs Up" on the right to say “Thanks” for helping!
Thank you,
BHK6
I work on behalf of HP

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1. System Preference > Sound > Output
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2. Try Reset SMC. http://support.apple.com/kb/HT3964
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Macbook pro has no sound, any ideas on the cause?

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