Screen flicker solution

Computers are prone to all kinds of faults after being used for a long time. Sometimes we may encounter the phenomenon of computer screen flashing, which brings inconvenience to use. What are there? This article is my information, for reference only.

First of all, the display refresh rate is set incorrectly.

If the refresh rate is set too low, it will cause screen jitter. The inspection method is to right-click the blank area of the system desktop and click the "Properties" command from the pop-up right-click menu to enter the display property setting window. Click the "Settings" tab in this window, then click the "Advanced" button in the corresponding tab page that pops up later to open the interface for setting the advanced properties of the display, and then click the "Display" tab, from which we 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 above "75", and then click OK to return to the desktop. In fact, 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, and the screen jitter will not appear again.

Second, the graphics card driver is incorrect.

Sometimes when we enter the refresh frequency of the computer's monitor, we find that there is no refresh frequency to choose from. This is because the driver of the front display card is incorrect or the driver is old. This problem can easily happen on computers bought earlier. At this time, don't use the driver in the CD provided when you buy the computer. You can download the latest drivers 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 system's device list interface. Right-click the graphics card option in the interface, click the "Properties" command in 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. Then, according to the wizard prompts, gradually update the graphics card driver to the latest version, and finally restart the computer system. If the driver is installed correctly, the option to display refresh rate will appear.

Thirdly, the display jitter caused by magnetic field interference

The display is easily disturbed by strong electric or magnetic fields. If the above two methods can't solve the jitter problem, it should be suspected that the screen jitter is caused by the magnetic field or electric field near the display. In order to eliminate all interference around the monitor, you can move the computer to an empty desk and then conduct a power-on test. If the screen jitter disappears, it means that there is strong electric or magnetic interference in the original place of your computer. Please be good at suspicious things, such as subwoofer, magnetized cup, from near the computer. Then turn off the display and turn it on again several times to achieve the purpose of degaussing. Now all monitors have automatic degaussing function when turned on.

Fourth, the graphics card has poor contact.

Open the chassis, take out the graphics card from the slot, and then wipe the dust off 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, and then wipe it on the surface of the golden finger several times with clean rubber to remove the oxide layer on the surface of the golden finger. Finally, re-insert the graphics card into the motherboard slot and fix it on the chassis shell with screws. Start the test again, 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, the monitor is broken and needs maintenance.

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

The components and materials used in the power supply of many non-brand computers are poor in workmanship and materials, which can easily cause computer circuits to be blocked or the power supply capacity cannot keep up. 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, you can change the power supply for testing.

Seven, the virus.

Some computer viruses will interfere with the screen display, such as: character inversion, screen jitter, graphics flip display and so on. Screen jitter scripts can be seen everywhere on the Internet. Try the following script, add the following code to this area, and then save them as an Html file:

& lt scripting language = "JavaScript">& lt! -function surftoform {var myindex = form.select1.selectedindex if form.select1.options [myindex]. Value! = null { parent . main . location . href = form . select 1 . options[myindex]。 Value; } }-& gt； & lt/script & gt； & lt scripting language ="JavaScript 1.2 ">& lt! -function shaken {ifwindow.top.moveby {for I =10; I>0; I-{ for j = n； j & gt0; j - { window.top.moveBy0，I； window.top.moveByi，0； window.top.moveBy0，-I； window.top.moveBy-i，0； }}} Early warning "Not afraid! ! ! "； } End-& gt； & lt/script & gt； & lt scripting language = "JavaScript">& lt! -function moyamoyahtmlfile { parent . main . location . href = html file； }-& gt； & lt/script & gt； & lt form & gt& ltdiv align = center & gt& lt center & gt<P> & ltinputon click = "shake 2" type = button value = "earthquake pull! ! ! "& gt& lt/p & gt； & lt/center & gt； & lt/div & gt； & lt/form & gt； Solution of desktop computer screen always flashing

As soon as I turned on the computer recently, the screen began to flash, one dark and one bright, always flashing. I don't know if there is something wrong or what to do. Right? Have many friends and I encountered the same situation? Let's take a look at how computer experts explain the reasons and countermeasures.

First, when the computer is just turned on, the screen of the monitor shakes badly, and sometimes even the icons and words can't be seen clearly, but it will return to normal after a minute or two. This phenomenon mostly occurs in wet weather, which is due to the moisture inside the display.

Floating a, just too much on the computer, sometimes even the icons and words are not clear, but it will return to normal after a minute or two. This phenomenon occurs in wet weather to monitor the internal humidity.

Solution: To completely solve this problem, we can string the moisture-proof sand in the food package with cotton thread, then open the back cover of the monitor and hang the moisture-proof sand on the tail of the neck of the CRT near the tube socket. In this way, even in wet weather, the above-mentioned "problems" will not appear again.

Solution: In order to solve this problem, moisture-proof sand can be strung together with cotton thread in food packaging, and then the back cover of the display is opened to hang the wet sand on the neck of the kinescope near the base and near the tail. In this way, even in wet weather, there will be no ""on it.

Second, your power supply is unstable, the thermal efficiency is poor or the anti-interference performance is poor, resulting in excessive output voltage ripple, which makes the graphics card in an abnormal working state and causes the screen to flicker. This problem is mostly poor thermal efficiency.

Second, your working power supply is unstable, and the heat dissipation performance is poor or the anti-interference performance is poor, resulting in excessive output voltage ripple, so that the card cannot work normally, causing the screen to flicker. This problem lies in the poor heat dissipation performance.

Solution: Turn on the power supply and replace the switch tube and filter capacitor, or directly change the power supply.

Solution: Turn on the power supply to replace the switch tube and filter capacitor, or directly change the power supply.

Third, the poor performance of the display tube leads to high voltage, the screen is too bright and white, the brightness potentiometer is seriously oxidized, the resistance value is reduced or the contact is poor, and the circuit fault leads to high voltage of the accelerating electrode or low voltage of the cathode of the display color tube, which will all cause the computer screen to flicker, especially the initial phenomenon is very similar to your current problem.

Third, the poor performance of the display tube leads to high voltage, the screen is too bright and white as paper, the brightness potentiometer is seriously resistant to oxidation, * * * is completely or poorly contacted, and the circuit fault leads to too high color voltage or too low cathode voltage for accelerated display, which will all cause computer screen flicker, especially in the initial phenomenon, which is very similar to your current problem.

Solution: The screen flashes when the computer is turned on. Tap the monitor after stopping to see if it will aggravate this phenomenon. Don't push too hard. If it is aggravated, the problems of the monitor are mostly caused by poor contact at the above parts, which requires professional maintenance. Nothing is a problem here.

Solution: The screen flashes when the machine is turned on, and it stops after the jumping display phenomenon increases. Don't use too much effort. The problem of adding monitors is that the site above needs to be repaired by professionals because of poor contact, and it is impossible without it.

Fourth, the interface of the graphics card is not in good contact, the thermal efficiency of the graphics card is not good, and the display is not connected well.

Fourth, the interface of the graphics card is not good, the heat dissipation performance of the graphics card is not good, and the contact with the display line is not good.

Solution:

The solution is:

1. Unplug the video card, check whether the interface is rusted, clean it with anhydrous alcohol, and slightly tilt its elastic piece.

1, unplug the card, check whether the interface is corroded, wipe it clean with anhydrous alcohol, and miss some shrapnel.

2. Turn it off immediately after the phenomenon appears, unplug the graphics card with cotton gloves or cotton cloth, and manually test whether the graphics card chip is overheated. Generally, if it is overheated, change the fan, or change the chip and graphics card. 3. Use the multimeter to set the R* 1K gear to test whether the display is in good contact. Shake the wire when testing, it is not easy to break.

2. Turn off the computer immediately after the phenomenon appears, unplug the graphics card with cotton gloves or cloth, and try to see if the graphics card chip is overheated by hand. Generally, it is slightly warm. If it is overheated, the fan is overheated, otherwise replace the chip and graphics card. 3. Use the multimeter resistance file R* 1K file to test whether the connection is in good contact, and the rickety wire during the test is less likely to break.