|"Have to switch your Input from antenna to s-video on the TV."|
You need to select an appropriate video input on the TV other than the TV's tuner - e.g. S-Video, or Video, VCR or DVD player if you're using a composite connection.
The TV has to be on, and the cable has to be connected to the TV properly when you set up the connection.
Once the connection works, Windows will retain the enabled TV Out display as long as the cable is still connected while Windows is running, but if you boot Windows with the cable disconnected it will be disabled automatically.
If it's legacy TV Out on the Dell, you have to connect to the TV either
- via a legacy S-Video cable (4 pins on each end) to a legacy S-Video port (4 pin holes) on the TV
- via having a legacy S-Video (4 pins) to single female RCA jack adapter in the "S-Video" port on the Dell, and using a single cable with RCA male plugs on each end to a composite video female RCA jack on the TV - yellow (it's usually beside red and white female RCA jacks for audio).
Legacy S-Video or composite TV OUT output is crappy looking on the TV in comparison to a monitor or HDMI connection. If the TV has a VGA or DVI or HDMI input port, the laptop has the same output port, don't bother using a S-Video or composite video connection.
You need to select an appropriate video input on the TV other than the TV's tuner - e.g. PC, VGA, DVI, or HDMI.