Sony PCG-GR390K - Manual (Page 187)

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Troubleshooting
This section describes how to solve common problems you may encounter
when using your notebook. Many problems have simple solutions, so try
these suggestions before you visit the Sony Computing Support Web site at
http://www.sony.com/pcsupport.
❑ Troubleshooting Your Notebook
❑ Troubleshooting the LCD Screen
❑ Troubleshooting the Mouse and Touchpad
❑ Troubleshooting Drives, PC Cards and Peripheral Devices
❑ Troubleshooting Software
❑ Troubleshooting the Modem
❑ Troubleshooting Audio
❑ Troubleshooting the Printer