My mac book pro no sound, But jack input Sound drive chose input sound,So sound hear, but no jack no sound

input sound no hear,but jack input sound chose drive, jack no have no sound

Hi there marielroad,
You may find the troubleshooting steps in the article below helpful.
Troubleshooting issues with no audio from built-in speakers on Macs
http://support.apple.com/kb/ts1574
-Griff W. 

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