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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

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To do the following procedure, you must have administrator rights on the computer.

1Click Start and then Control Panel.

2Click Performance and Maintenance.

3Click Power Options.

4Select the tab for power scheme settings.

5Select the desired power scheme from the drop-down list.

6On the VAIO Power Management tab, select No change for LCD Brightness.

7Click 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 the computer started, you will not be able to select a display by pressing the Fn+F7 keys.