What is the reason for the system white screen? What are the solutions?

I believe that black screens or blue screens are commonplace nowadays, but many people may have an impression when they talk about white screens, but they don’t understand them. In fact, the status of white screens is also a lot, but people don’t know how to solve them. Let me talk about it today.

What is the white screen of the computer? The white screen of the computer is the fault of the white screen (white screen) after the LCD screen is turned on. This is the fault phenomenon of the white screen of the boot screen. The phenomenon is less common and mainly occurs on some displays that have been used for a long time. Because there are not many computer failures in this process, some friends may be confused about the computer host failure or the display failure when they encounter the white screen of the computer. They are introduced around these questions, and the general solution for the white screen of the display is hoped for future encounters. It is helpful to friends who have a white screen on the monitor.

There are several reasons for the white screen of the computer.

First, the internal problems of the display, including: LCD panel driver circuit problems, LCD panel power supply circuit problems, poor screen line contact, motherboard control circuit problems and other issues.

Second, the white screen of the display may also be poor or damaged contact of the video card or video cable.

Solution white screen solution and maintenance ideas:

First, whether it is a graphics card problem or VGA line problem, you can replace a VGA cable with a good monitor connected to a computer with a white screen failure See if it is still white. If it is still a white screen, it is a host computer problem. Most of the graphics cards are poorly connected or faulty. However, in most cases, this kind of situation rarely occurs. In addition, most of them are normal. It is normal to change the monitor connection. Then we can know that it is because the display is faulty. Caused by. The solution to the white screen phenomenon caused by poor display is as follows:

1. First open the outer casing of the LCD display, and then check if the screen interface is loose or not connected. Check that the screen cable is connected properly.

2. Then turn on the power switch of the notebook computer, and then use a multimeter to measure whether the power supply voltage of the screen line interface is normal. If the supply voltage is normal, go to step 5; if not, then check if the fuse or fuse in the vicinity of the screen output is open or damaged. If it is damaged, replace the damaged component.

3. If the fuse resistor or fuse inductance near the output of the screen line is normal, then check whether the output voltage of the DC-DC voltage conversion circuit that supplies power to the LCD display is normal. If the output voltage is not normal, check the fuse resistor, PWM controller, switch tube, inductor coil, filter capacitor and other components in this power circuit, and then replace the damaged components.

4. If the output voltage of the DC-DC voltage conversion circuit is normal, it is a component such as a capacitor between the output of the DC-DC voltage conversion circuit and the interface of the screen. Check and replace the damaged one. Components can be.

5. If the power supply voltage of the screen line interface is normal, then check the timing signal and drive signal in the LCD panel drive circuit. If it is not normal, check the output signal, the input signal and the supply voltage of the chip that generates this signal to determine whether the driver chip is damaged. If it is damaged, replace it.

Now I know the solution for white screen. Although we usually have less contact with this, the situation of white screen can not be ignored. I hope everyone can take a good look and hope to help everyone.