connect your video cable from the laptop to the tv.
select the av channel on the tv set.
click stsrt/control panel/performance and maintenance/display/settings
you should see two screens 1 and 2
click screen 2,set the resolution to 640x480 via the slider and tick the "extend my desktop to this monitor" box
play your dvd,window it and drag it across and off the screen from the laptop screen to the tv screen while its playing.right click it it again and select full screen one on the tv.
ps if its black and white and you have an nvidia card im told tv tool helps sort this click here