The electrical components are connected in a closed loop or pathway, creating an electrical circuit. Wires are used to create this route, which is then powered by something like a battery. When discussing electrical circuits, the term source refers to the location from which electrons enter, and return refers to the location from which they are released. For an electrical circuit to be considered complete, there must be at least one full loop from the positive to the negative terminal. That's the most basic kind of circuit there is. The TV's internal circuit is more complex and uses a variety of new parts.
