1, poor screen quality (LCD only)
If the boot monitor shakes, the monitor will return to normal when the host works for about 30 minutes. In this case, you may be the victim of inferior screen. You can search "Screen Door Event" through Baidu to see if your computer brand and model are among them (in order to avoid controversy, I won't mention the specific brand and model here, and the above phenomenon is a typical screen door symptom). Solution: If the computer is still under warranty, you should contact the dealer to return it as soon as possible. If the warranty period is exceeded, only the screen can be replaced.
2. The display refresh frequency setting is too low.
Generally, the screen refresh rate below 75Hz will lead to visual jitter. Of course, this jitter is not particularly obvious, but facing the display with low refresh rate for a long time will cause visual fatigue and increase the risk of myopia.
Solution: Right-click a blank desktop, select Properties, select Settings in the Display Properties menu, click Advanced in the Settings window, and select Monitor in the pop-up menu to adjust the screen refresh frequency to above 85Hz.
3. Electromagnetic interference appears around the monitor.
When you use a hair dryer, microwave oven, induction cooker, juicer and other equipment close to the display, in most cases, the display will shake and moire interference will occur. Solution: Keep the above jamming equipment away from the computer monitor.
4. LCD uses inferior external power supply.
The form of expression is display jitter, and a black interference band moves from top to bottom or from bottom to top on the screen. A qualified display power supply should have anti-interference ability, and the power cord is equipped with a magnetic ring to prevent electromagnetic interference. Display jitter may be caused by insufficient power, poor filtering and poor anti-interference ability of inferior power supply (inferior power supply often has the characteristics of light weight and incomplete power supply parameters without anti-electromagnetic interference magnetic ring). Some netizens also reported that their brand computers are regular high-quality power supplies, and there are also display jitter problems. Later, it was found that it was caused by the aging damage of power filter capacitor. Solution: Replace the matching high-quality monitor power supply.
5. Strong magnetic devices such as computer speakers are too close to the monitor.
When the current passes through the speaker of the sound box, it will radiate electromagnetic interference to the surrounding area, which is harmless to the human body, but it may cause the display screen to shake. Solution: Keep the speaker away from the display screen as far as possible or replace the LCD (the influence of strong magnetic field on LCD is relatively small and almost negligible).
This computer is infected with Trojan virus.
I remember a netizen gave me a program script last year. When running this script, the screen will automatically shake. Later, I learned that this is the display jitter virus that spread wildly on the Internet, and the viruses that broke out with it, such as screen character inversion and character garbled, really worried netizens about the solution: download and install anti-virus software, update the virus database and conduct a comprehensive scan.
7, graphics card failure
It turns out that I had a similar problem when I was repairing my computer. The user asked to deal with the jitter of the display. When I sent it for repair, the display screen kept shaking with granular color blocks. After I 1 hour trial operation, the display screen was directly broken. After inspection, it turned out that the video memory of the graphics card was damaged. Solution: remove the oxide at the gold finger of the graphics card and plug it in again; Replace the new graphics card.
8. The degaussing circuit of the display is working.
When the user uses the degaussing function of the monitor, the screen will shake up, down, left and right for a few seconds, but this may only happen when the user actively turns on the degaussing function. If similar jitter occurs without using the degaussing function, it should be judged that the display is damaged. Solution: Send the monitor for repair and deal with the degaussing circuit fault.
Recovery method of mobile phone screen fault
Option 1:
1, turn off the phone, take out the battery, and let the phone stand for about five minutes;
2. Find a USB cable and connect it to the mobile phone;
3. Wash your hands or get your hands wet;
4. When the hand is wet, the thumb of the same hand touches the metal part at the other end of the USB cable, and the index finger presses to the ground for about two seconds;
Option 2:
The electric shock method, which uses the electrostatic device in the lighter to shock the screen (cover the faulty place with a paper towel soaked with water) and change the electric field, may not be all applicable, so everyone should be cautious!
Option 3:
There is an article in the computer newspaper to solve screen drift. Blow the screen with a hot hair dryer (hair dryer), pay attention to the middle range, blow evenly, and feel that the screen is hot (note: I will blow the phone hot).
Option 4:
When you desperately want to buy an external screen, you can try to do all the above schemes, doping and repeating them. It may take a long time to repeat the doping method, but 90% will be repaired successfully.
Daily maintenance methods:
The ultimate recovery method of screen failure: restore factory settings.
The path is: open the phone menu-Settings-Security Privacy-Restore factory settings.
In the case of different individual mobile phones, it is not excluded to restore the factory settings and put them in other directories.