Sony PCG-GRV550 - Manual (Page 117)

Using Computer Monitors and Projectors
117
3 Click the Displays tab and select the display settings by clicking the
icon on the panel of your display choice. For more information, click Help.
(Multiple Monitors) and Mobility Radeon Properties screen
✍
If you cannot see your movie or DVD on the external display, change the monitor or
TV setting by clicking on the Secondary
icon and changing it to Primary .
✍
You may not be able to display the computer screen (LCD) and an external display
or projector at the same time, depending on the types of computer displays and
projectors you are using.
Turn on the computer after you connect the external display.