Sony PCG-GR290 - Manual (Page 29)

Shutting Down Your Notebook
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5 Turn off any peripherals connected to your notebook.
If you are unable to shut down your notebook.
1 Close or end all operations as follows:
❑ Close all applications.
❑ Remove the PC Cards.
❑ Disconnect USB devices.
2 Restart the notebook. You can restart your notebook by pressing the
Ctrl+Alt+Delete keys simultaneously.
✍
During a period of inactivity, you can conserve battery life by using Standby mode. See
“Controlling Power Management” in the online User Guide for more information.
✍
If you are still unable to shut down the notebook, press the power button and hold it
for more than four seconds. This operation may result in data loss.