Sony PCG-NV100 VAIO User Manual page 148

I cannot switch the LCD display to TV and vice versa.
1.
Ensure that the TV was connected, configured, and powered on correctly prior to starting the computer. See
Connecting an Audio-Video Device
2.
Remove the DVD video disc if it is inserted in the optical drive.
3.
Press Fn+F8 to change the display.
for more information.
Page 148