Dell Latitude C540 - Manual (Page 110)

Click the Displays tab. 3.
Click the upper-left corner of the TV button to enable the television. 4.
To play a DVD on the television, click the small "primary" button (resembles a bulls-eye) at bottom left
under the TV picture. 5.
NOTE: Various programs access the hardware in different ways. You may or may not need to click the
primary button for operations other than playing DVDs.
Click Apply. 6.
Click Yes to keep the new settings. 7.
Click OK. 8.
DVD video is visible only on the display that is set to primary. While the DVD is playing, the DVD player
window on your computer display is blank or (if the DVD player window is set to full-screen mode) the entire
computer display screen is blank.