Reason one, the display refresh rate setting is incorrect
If the refresh rate setting is too low, it will cause the screen to wobble, check the blank area of the system desktop with the right mouse button, click the Properties command from the pop-up right-click menu, and go to the Properties Settings window of the monitor. Click the Settings tab in the window, and then click the Advanced button in the corresponding depth Win7 System tab page, open the Advanced Properties settings interface for the monitor, and click the Monitor tab, where you can see the display refresh rate set to "60". This is why the monitor screen is constantly shaking.
Set the new frequency to "75" and then click OK to return to the desktop. In fact, monitor screen jitter is the main reason is the display of the refresh rate is less than 75Hz, at this time the screen will often appear jitter, flashing phenomenon, we simply adjust the refresh rate to more than 75Hz, then the screen jitter phenomenon will not appear again.
Reason two, graphics driver is incorrect
Sometimes when we go into the computer's monitor refresh rate, we find that there is no refresh rate to choose from, because the driver of the previous video card is incorrect or too old. It's easy to get this problem on a computer that has an earlier purchase time at this point do not use the purchase of the computer with the CD-ROM driver, you can download the corresponding display card of the latest version of the driver, and then open the "System" Properties window, click the "Hardware" window of the Device Manager button to enter the system's device list interface. Right-click the display card option in the interface, click Properties from the pop-up right-click menu, and then click the Driver tab in the Card Properties Settings window that appears in Dan, and then click the Update Driver button in the corresponding tab page. After the wizard prompts Step-by-step to update the graphics driver to the latest version, and finally the computer system restarted a bit, if the driver installation is appropriate, the display will appear refresh frequency options, and then set the refresh rate to more than 75Hz.
