If your monitor (especially the tube) for many years may have failed any of its parts. Any changes in settings that will not fix it. If the monitor is not over the warranty, give it to a service center. A better - think about purchasing a new device.In that case, if you are worried about the flickering on the monitor, change the refresh rate of the screen. By default, the screen is updated once per minute. For some monitors this is not enough. Call feature Screen." To do this, click the right mouse button at any free part of the "Desktop" and select menu item "Properties". This will open a new dialog box.This window can be opened in another way. Using the start menu, open "control Panel". In the category "appearance and themes, select any of the jobs or click the Screen with the left mouse button. In the opened window, go to the Settings tab and click Advanced. In the Properties window Module, connect the monitor and the [name of your graphics card] open the" Monitor "tab and set the marker in the field "to Hide modes which the monitor cannot use". In the group Settings of the monitor, select the desired refresh rate by selecting a value from the drop-down list. The higher the frequency, the less flicker a monitor. Click on the "Apply" button, confirm your changes and close the window. Cause unstable operation of the monitor may be problems with the video card or the wrong choice of driver. Install the driver to the monitor with the installation disc, which is included in the delivery kit of the monitor. If the disk has been lost and you are going to download the driver from Internet, please check the model of your monitor and install software only from official website manufacturer.Sometimes display issues can be caused by other equipment located in the vicinity of the monitor. In this case, make sure that devices emitting microwaves were away from your monitor.
Advice 2 : Why is shaking the screen
Sometimes sitting at the computer, you notice that the image on the screen is shaking, a kind of "floats" or starts suddenly shakings. This problem is widespread. But the reasons for it are different. It is necessary to understand with why the screen is shaking.
The most common cause of shaking screen is the presence in the operating room or apartment of a source of alternating electromagnetic fields. This can be verified very easily by using the movement monitor. If the shaking stops, then the problem is associated with electromagnetic fields. Their sources are various electrical installations, transformer substations, and transmission lines. At home, replace them with TV, refrigerator, microwave, and other appliances.
The second most frequent cause of shaking screen - lack of power supply. As a rule, the monitor can be connected to the pilot which, in addition to him, another "feed" the system unit, modem, TV, chandelier, and much more, depending on the user's taste. Worth a try to disable some of these devices and see decreased whether the shaking image on the monitor. If not, then perhaps the problem is in the pilot, how it filters the electricity. You can just try to change it.
Less often (though most often coming to mind) the reason for the shaking image may be a fault inside the monitor, for example, a broken scanner in the monitor or a problem with the system its power. In such cases it is inexperienced users to climb inside the monitor. The best solution in this situation would be to appeal to qualified specialists.
Sometimes the cause of the above problems could be the low refresh rate of the screen. By default, some monitors frequency exhibited in the region of 60 Hz. This not only makes visible trembling of the screen, but also extremely harmful to the eye. Therefore it is necessary through "control Panel" find the menu item "Display" and set there the frequency of 75 Hz. When the frequency jitter of the screen can go completely.