If you look at the manual for that device -- https/www.manualslib.com/manual/145361/Samsung-Ps-42a5s.html You will see that the manufacturer referrs to is as a monitor not a TV. It does not have a TV tuner. You will have to purchase an external tuner like this -- https/www.amazon.com/Edal-Receiver-Converter-Recording-Composite/dp/B01LYL35SP/ You will also want an HDMI to DVI cable to connect to the Samsung since it doesn't have an HDMI input.
If you look at the manual for that device -- https/www.manualslib.com/manual/145361/Samsung-Ps-42a5s.html You will see that the manufacturer referrs to is as a monitor not a TV. It does not have a TV tuner. You will have to purchase an external tuner like this -- https/www.amazon.com/Edal-Receiver-Converter-Recording-Composite/dp/B01LYL35SP/ You will also want an HDMI to DVI cable to connect to the Samsung since it doesn't have an HDMI input.