Sony VGN-TX700 - Manual (Page 145)

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Troubleshooting
Why does it take time before my computer starts?
If Norton Internet Security's Personal Firewall is active, it may take some time before the Desktop screen appears due to
network security checkups.
Why doesn't the LCD turn off when the time selected for the automatic turn-off action has
passed?
The originally selected VAIO's screen saver disables the timer setting, which you can select using the Windows power
options, for the LCD to turn off.
Change the originally selected VAIO's screen saver.