Television screens are measured diagonally because this is the way screens were originally measured. Early TVs had circular picture tubes that projected images onto the screen. The surface area of the screen could not be larger than the surface area of the tube, so measuring the tube gave the best measurement of the screen.Know More
The use of diagonal measurements to determine screen size was not considered to be misleading, since previous televisions all had a ratio of 4:3. The ratio meant that the height of a screen was three-fourths the size of the width. When widescreen televisions become popular, the ratio jumped to 16.9, and the stated screen size became far less accurate than the actual horizontal measurement. Due to lawsuits that arose from the discrepancy between the stated screen size and the actual size, manufacturers are legally obligated to specify the viewable screen dimensions. However, most screens are still identified and marketed using the diagonal measurement. Some manufacturers have started to add a "w" to the screen size to indicate a television is widescreen.
The diagonal measurement method is slightly different for CRT TVs, or cathode ray tube televisions, and LCD TVs. A CRT TV is measured diagonally from the top corner to the bottom corner, including the TV casing. However, LCDs are measured the same way, but only the actual screen is measured.Learn more in Television & Video
To mount a TV, attach the mounting arms to the TV, choose a location on the wall, attach the mount bracket to the wall and hang the TV. Use a stud finder to locate studs in your wall.Full Answer >
Power supply failures often cause televisions to shut off by themselves. The problems may be in the television's power system or from the source of power. Problems with cable boxes can make it look like the television is turning off on its own.Full Answer >
Calibrating a TV involves selecting a picture mode and adjusting the color, contrast, brightness, tint and screen size settings. Proper calibration results in a clear, crisp picture on the television, reduced electric usage and a longer lifespan for the TV.Full Answer >
Faint buzzing from a TV is normal when it is turned on. If it is a plasma TV, the buzzing noise could be due to the altitude of the television. If a plasma TV is above 6,500 feet, it may buzz loudly.Full Answer >