What is the jitter in the lower half of the laptop screen?

The lower part of the laptop screen will shake, which may be as follows:

1. The display refresh rate is set incorrectly.

1. If the refresh rate is set too low, the screen will shake. The checking method is to click the blank area of the system desktop with the right mouse button, and click the "Properties" command from the pop-up right-click menu to enter the display property setting window.

2. Click the "Settings" tab in this window, click the "Advanced" button in the corresponding tab page that pops up later, and then click the "Display" tab, from which you can see that the refresh frequency of the display is set to "60", which is the reason why the display screen keeps shaking. Set the new frequency higher than "75", and then click "OK" to return to the desktop.

3. Actually, the main reason for the display screen jitter is that the refresh frequency of the display is set below 75Hz. At this time, the screen often appears jitter and flicker. We just need to increase the refresh rate to above 75Hz, so that the screen jitter will not appear again.

Second, the graphics card driver is incorrect.

1. Sometimes when you enter the refresh frequency of the computer monitor, you will find that there is no refresh frequency to choose from. This is because the driver of the front graphics card is incorrect or too old.

2. Computers bought earlier are prone to this problem. At this time, please do not use the driver on the CD when you bought the computer. You can download the latest driver of the corresponding graphics card from the Internet, then open the system's properties window and click the device manager button in the hardware window to enter the interface of the system's device list.

3. Right-click the graphics card option in the interface, click the "Properties" command from the pop-up right-click menu, then click the "Driver" tab in the pop-up graphics card property setting window, and then click the "Update Driver" button in the corresponding tab page. After that, the graphics card driver will be updated to the latest version step by step according to the wizard prompts, and finally the computer system will be restarted. If the driver is installed correctly, the display refresh frequency option will appear.

Thirdly, the display jitter caused by magnetic field interference

1. The display is easily disturbed by strong electric or magnetic fields. If the jitter problem cannot be solved by using the above two methods, it should be suspected that the screen jitter is caused by the magnetic field or electric field near the display.

2. In order to eliminate all the interference around the monitor, you can move the computer to an empty desk and then start the test. If the phenomenon of screen jitter disappears, it means that there is strong electric field or strong magnetic field interference in the original place of the computer. Please pay attention to suspicious items near the computer (such as subwoofer and magnetized cups of speakers).

3. Then turn off the monitor and turn it on several times to achieve the purpose of degaussing (at present, all monitors have automatic degaussing function when turned on).

Fourth, the graphics card has poor contact.

1, open the chassis, pull the graphics card out of the slot, and then wipe the dust on the gold finger of the graphics card by hand. It is best to find a soft fine brush to gently remove all the dust on the surface of the graphics card.

2. Then wipe the surface of the golden finger several times with clean rubber to remove the oxide layer on the surface of the golden finger.

3. Finally, the graphics card will be tightly inserted into the motherboard slot again and fixed on the chassis shell with screws. Restart the machine test, and the general fault can be solved.

Five, the display aging

Sometimes, due to the aging of the monitor used, jitter also occurs. In order to check whether the electronic components inside the monitor are aging, you can connect the faulty monitor to someone else's computer for testing. If the fault still disappears, it means that the display screen is damaged and needs to be repaired.

Six, inferior power supply or power supply equipment has been aging.

The components used in the power supply of many miscellaneous computers are poor in workmanship and materials, which can easily lead to computer circuit blockage or power supply capacity failure. When the system is busy, the display will especially appear the phenomenon of screen jitter. When the power supply equipment of the computer begins to age, it is easy to cause the same problem. At this time, the power supply can be changed for testing.