Sony VGN S400 Series Laptop User Manual


 
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Troubleshooting
What should I do if the brightness of the screen changes?
The brightness of your screen when 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.
1 Click Start and then Control Panel.
2 Click Performance and Maintenance.
3 Click Power Options.
4 On the Power Schemes tab, select the desired power scheme from the Power schemes list.
5 On the VAIO Power Management tab, select No change under Plugged in and Running on batteries for LCD Brightness.
6 Click OK.
The preference for the brightness adjusted with the Fn+F5/F6 keys is saved and your screen brightness remains unchanged
regardless of operating conditions.
What should I do if the external display (or TV) does not display anything?
If you change the log-on user with the Fast User Switching function after your computer started, you will not be able to select a
display by pressing the Fn+F7 keys.