You can connect the computer to the TV by a VGA or HDMI cable. Or you can obtain a wireless TV dongle such as Google Chromecast which uses your wi-fi. If you are using Win 8, then you can also use Miracast with a wireless Microsoft dongle. Miracast is a direct wireless connection and does not need wi-fi. Roku devices can also do this, but applications are limited.
XPS M1530, Win 10 CU Pro 32-bit
Inspiron E1705, Win 10 CU Pro 32-bit
Dimension 9100, Win 10 AU Pro 32 bit
Inspiron 660, Win 10 CU 64 bit
Inspiron 3668, Win 10 CU 64 bit
Asus T100 Tablet, Windows 10 CU 32 bit