today there is no sound both from build in speaker and headphone of my macbook pro

Hello kellylee,

I was researching the issue you are experiencing and came across an article that I feel would be helpful in isolating where the issue is happening. It is called Isolating issues in Mac OS X found here: http://support.apple.com/kb/ts1388.

You want to start here and work your way down if needed.

Is it a software or hardware issue?

Pay attention to important clues.

• If the issue seems specific to a certain application or Mac OS X feature, troubleshoot software before hardware.
• If the issue occurs as the computer starts up--unless the computer does not turn on at all-- troubleshoot software before hardware.
• For other issues, or when software troubleshooting does not produce a resolution, use the rest of this document.

Take care,

Sterlin