What Should I Do If The External Display Remains Blank - Sony VAIO VGN-AW100 Series User Manual

What should I do if the LCD brightness of my screen changes?
The LCD brightness setting, adjusted with the Fn+F5/F6 keys, is temporary and may be restored to the original setting when
your computer returns to Normal mode from Sleep or Hibernate mode. To save your preference for the brightness, follow
these steps:
1 Right-click the power status icon on the taskbar and select Power Options.
2 Click Change plan settings under the current power plan.
3 Click Change advanced power settings.
4 Select the Advanced settings tab.
5 Double-click Display.
6 Adjust the LCD brightness setting in the item for brightness adjustment.

What should I do if the external display remains blank?

If you cannot change the display output with the Fn+F7 keys, you need to change the settings for the external display with
VAIO Control Center. To change the settings, launch the VAIO Control Center, select the control item for the external
display, and then click to select the check box for changing the options to detect the external display. Then, use the Fn+F7
keys to change the display output.
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Troubleshooting