Sony PCG-GR390K - Manual (Page 64)

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3 Toggle between your LCD and your TV with the Fn+F8 key combination.
Your image is now displayed on both LCD and TV. 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
ntoebook is more than 1024 x 768 dots.