The set’s complement of video and audio inputs and output connections determines how various signals get into and, to a much lesser degree, out of the display. A set with a full assortment of the various video inputs will ensure that you can connect your current and future source components. For regular signals, displays are usually equipped with S-video inputs, which feature a 4-pin mini connector, and the lower-grade composite video, which features a yellow-rimmed coaxial connector. Component video inputs use three separate video cables to provide better image quality than composite or S-video signals. Normal component connections accept only regular DVD players. Wideband component inputs handle both regular and progressive-scan DVD players and HDTV tuners. If you use a surround receiver or processor to switch between sources, you could live rather easily with a display that has only one set of each connector type.

Other less-common connections include RGBHV, which usually refers to a computer or HDTV video display input. This typically uses the familiar PC monitor–like, 15-pin trapezoidal-shaped VGA connector. In some cases, 5 coaxial inputs are grouped together using the twist-and-lock, pro-style BNC connector. What type of signals the connector will accept depends on the TV, so check the set carefully.

A VGA-type connector usually means that the TV will accept signals from your personal computer or PC-based game-box consoles. The 5-BNC connection might indicate HDTV acceptance. In many cases, a simple DB-15 VGA-to-5-BNC "breakout" cable can accommodate one signal or another, assuming the TV’s input can handle it.