But the monitors have their own problems. In the time when CRT monitors where used, the monitors which were used for long hours used to generate heat within them. This caused much problem to the tube that was use in them. When the tube was heated to a very large temperature, the screen would start go dim and bluish throughout. This may also lead to loosening of some of the solder connections inside the monitor. When this happens one of the primary colours loses its control and either doesn’t show up or shows up completely.
To prevent these, one must always help the monitor to regulate the temperature. How that can be done is by maintaining a solid room temperature. Besides, while not using the computer, the monitors have to be switched off. This saves the current that you spend on the monitor as well as protects the monitor and increases its life span by a great deal.
Having said that, a monitor is generally a device that is used for a long term and hence not many would face any technical failures. Sometimes it can be just a loose connection that will cause a lot of problem. In such cases asking for a help from a technician is much more advisable.