To resolve this symptom, please download the latest Audio Driver Upgrade Program
In the Downloads section, please select Notebook and proceed with the steps below:
1. Move the cursor to the relevant Notebook Series and click the model of the VAIO computer.
2. Locate Display Video Driver Upgrade and proceed as per instructions on the screen.
* If after performing device driver upgrade, the problem still persists, please do consult your local Sony VAIO Helpdesk. For more information on how to contact your local Sony VAIO Helpdesk, please refer to either Customer Service Guide or Warranty Card that comes with the computer, or visit the VAIO Online Website.