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Monitor

A display is a monitor, the primary output device for a computer. Every computer will have some form of display whether the standard video monitor, an LCD (Liquid Crystal Display), or one of the new thin monitors.

Monitor Technology

The most common of all displays is the video monitor. For most of us, it looks like a television screen. While it operates on the same principles of a television, the specifications are quite different. Since the predominate feature of a standard monitor is the screen itself, let's start by taking a closer look at the cathode ray tube (CRT) also known as the screen.

CRT

The cathode ray tube is the only vacuum tube still being used in computers and televisions. It consists of a conical shaped tube on which one end has been elongated. On the large flat end of the cone is the screen that we look at. The other end contains the electron guns that create the lighted image on the screen. In the middle are various coils and electronic circuitry that control the formation of the image.

Maintanance of monitor

When a monitor goes bad.When it comes to monitors, for a computer technician they should be considered just like power supplies. There are no internal serviceable parts.

CAUTION - VIDEO MONITORS HAVE INHERENT DANGERS FROM THE HIGH FREQUENCY/HIGH VOLTAGE POWER REQUIRED TO OPERATE (UP TO 50,000 VOLTS). SERVICING AND ADJUSTMENT OF THE INTERNAL COMPONENTS SHOULD BE LEFT TO A MONITOR SPECIALIST!

There are only two kinds of display problems. Either it doesn't work or the image is bad.

Let's first look at the monitor that doesn't work.

You know when a monitor is not working, because the computer is ON and the screen is blank. When this happens, there are only three places to check.

References

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