Sony PCG-GR250P Manual

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Shutting Down Your Notebook
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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.