There no sound coming on my sony laptop - Intel Durabook V38263 Notebook

Check on the system tray that is on the bottom left side on the speaker icon if there is a cross mark then it is in mute unmute it if not open the mixer and check if there is a check mark on the mute or else go to the device manager mycomputer right click manage open it then click on the device manager on left on the centre check for the sound drivers and you see any yellow exclamation mark or any other mark
let me know if it helped

Please refer tothe following article for a detailed diagnosis procedure:
http://www.fixya.com/support/r6683473-troubleshooting_laptop_sound_problems_no