Sony VGN-AR11B, Руководство пользователя

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Troubleshooting
What should I do if the LCD brightness of my computer screen changes?
The LCD brightness setting, adjusted with the Fn+F5/F6 keys, is temporary and this adjustment is overridden by the setting
on the VAIO Power Management tab when another power scheme is selected.
To save this preference for the brightness
✍
To do the following procedure, you must have administrator rights on your computer.
1 Click Start and then Control Panel.
2 Click Performance and Maintenance.
3 Click Power Options.
4 Select the tab for power scheme settings.
5 Select the desired power scheme from the drop-down list.
6 On the VAIO Power Management tab, select No change for LCD Brightness.
7 Click OK.
The preference for the LCD brightness adjusted with the Fn+F5/F6 keys is saved and the brightness of your computer screen
remains unchanged regardless of operating conditions.