The earliest televisions were using a CRT tube and had external antennas which would pick up the signal from the local television transmission tower. Over a period of time the televisions have changed in design, weight and display technology .
Some of the latest models of television are using LED screens. However it appears that the LED screens are extremely fragile and can be easily damaged. Unlike LCD displays, it is not very easy to repair the damaged LED screen, repairing a damaged LED monitor can be very expensive, with the cost of repairs to the LED screen being almost the same as the cost of the display.
Today most homes with a television are having a cable connection with a set top box or satellite tv for accurate billing.