Sony PCG-GRX510P - Manual (Page 72)

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To change the display
If you insert a DVD in your optical drive to watch on your TV, the Fn+F8 key
combination might not activate the function to toggle between your LCD and TV.
Follow the procedure below.
1 Connect the TV to the notebook.
2 Restart the notebook and wait until it finishes rebooting.
3 Use the Fn+F8 key combination to toggle between the LCD and TV display.
The DVD will play on only one display at a time, so select either LCD or TV
as the primary display. See “Selecting the Display Mode” for more
information.
4 Re-insert your DVD to launch your DVD software.
✍
A part of the image cannot be displayed on your TV display if the resolution of your
notebook is more than 1024 x 768 dots.