My computer sometimes has a white screen

The white screen when turned on, or the people who use the computer understand the meaning of this "white screen", but there are also a few people who use the computer who do not know enough about the white screen. Is it a quality problem with the screen or a damaged graphics card? Will it occur if the LCD screen is not in good contact with the motherboard cable frequently?

Why do some laptops occasionally have white screens? How can you determine the meaning of a white screen?

With these questions, the author will give a detailed answer to the meaning of the white screen and the ** that produces the white screen. First of all, the white screen is our term in the maintenance industry, the boot light can be lit, the screen is blank and the boot screen is not displayed, but the sound of entering windows can be heard.

In the process of use, you need to know how to count as a white screen, whether the white screen is connected to the graphics card, as long as the computer and PC monitor are connected to the boot to see if the display is normal (generally there is a port for an external PC monitor behind the computer). If the PC monitor display and the laptop screen display are both white, then the possibility of damage to the graphics card is relatively high. The graphics card of the laptop is divided into two sets of synchronous signal output, one for the LCD screen and the other for the display port, so the best test method for whether it is connected to the graphics card is to connect it to the PC monitor.

Maybe there's something wrong with the motherboard of my computer, and that's how my computer is sometimes, and I get a motherboard for a new one.

1.Poor or faulty graphics card contact will cause a white screen on the computer, just check the graphics card or replace it with a new one

2.Loose memory modules will also cause a white screen on the computer, so you can pull out the memory module, clean the slot, clean the memory module, and then plug it back in.

4.Problems with the LCD panel drive circuit and LCD panel power supply circuit will cause the computer to be white, and we need to take it to a professional maintenance point for repair.

Solution: 1. First disassemble the shell of the LCD screen, and then check whether the screen cable interface is loose or not connected. After checking, the screen cable is connected normally.

2. Then turn on the power switch of the laptop, and then use the multimeter to measure whether the power supply voltage of the screen cable interface is normal. If the supply voltage is normal, go to step 5; If it is not normal, then check whether the fuse resistor or fuse inductor near the output of the screen cable is open or damaged. If it is damaged, the damaged component can be replaced.

3. If the fuse resistor or fuse inductance near the output end of the screen cable is normal, then check the DC-DC that supplies power to the LCD screen. Whether the voltage at the output of the voltage conversion circuit is normal. If the output voltage is abnormal, check the fuse resistor, PWM, controller, switch tube, inductance coil, filter capacitor and other components in this power supply circuit, and then replace the damaged components.

1. The white screen has been turned on at the boot:

This situation is mostly caused by damage to the screen cable or LCD screen. Graphics cards and motherboards have a low probability of such failures. Replacing the screen cable or screen can solve the fault, and sometimes the screen cable and screen are not too damaged can also be repaired directly.

2. White screen in running laptop:

This kind of notebook white screen is not necessarily completely white, sometimes the screen starts from the periphery of the screen first, and slowly the full screen becomes white, and it will return to normal after shutting down for a while, and the time of failure is also random.

3. Move the laptop or open and close the white screen of the screen

This kind of white screen is mostly due to the failure of the screen line, in the process of opening and closing the screen, the screen line is disconnected from the virtual connection, the power supply voltage of the screen does not come up, the image can not be displayed, only the white backlight, the reason is that the screen line is worn and disassembled.

The computer white screen, it is recommended to solve it from the following aspects:

1. If the monitor, power supply and CPU work for too long, it will cause a crash. Dusting, oiling, or fan replacement will be performed. A temporary fan will be added to the main cabinet of the desktop computer to assist in heat dissipation, and a cooling pad will be added in the book.

2. The machine has too much dust and poor contact. Clean the chassis and plug all connections firmly in.

3. If the memory module is loose, please pull out the memory, clean the slot, clean the memory finger, and then insert it tightly. If there is a problem with the quality of the memory module, replace the problematic memory and increase the virtual memory value.

4. Set the BIOS to the default value, remove the motherboard battery, connect the positive and negative poles of the motherboard battery slot, and then install the battery.

Pay attention to the response time

Pay attention to the response time

The manual answer is in the queue

I've seen your feedback

No need to ask repeatedly

No need to ask repeatedly

No need to ask repeatedly

4. It may be because there is too much dust in the chassis and poor contact, and the chassis needs to be cleaned in time.

White screens are rare, and it could be a failure of the graphics card, monitor, or memory.

1: There is a content display when booting up, you can press and hold F8 when booting up to enter safe mode, if you enter safe mode normally, it means that it is a graphics card driver problem.

Two: The screen is white immediately after booting, which may be a problem with the graphics card or monitor. (Socket failure, hardware failure is possible).

Three: You can try to unplug and unplug the memory a few times, clear the dust of the memory slot, and pay attention to the need to power off when unplugging and unplugging the memory.

Ask about the after-sales of the TV. It may be a compatibility problem1I heard that TV can access the Internet before, but I didn't expect it to be on QQ? Even if it does, there are a lot of problems with the system in the TV. Also present and some software.

Incompatible cases!

Problems with the graphics card itself, go and change it as soon as possible. I kid you not. When choosing a new computer, you must do more testing, if there is a problem with the hardware itself, it will be very troublesome later.

No, the configuration doesn't match,

Computer White Screen Solution:

1. The case does not dissipate well and the white screen caused by the temperature of the graphics card rising.

The solution is to eliminate heat dissipation issues.

2. The solution caused by the graphics card or monitor not supporting high resolution:

1) Restart the computer, press the F8 key continuously, pop up the advanced boot menu, select enter to enter the "Safe Mode" to log in to the system, then enter the display settings under Windows, select the 16-color state, click the "Apply" button, and click the "OK" button.

2) Restart the computer, in Windows normal mode, enter the Device Manager, delete the graphics card driver, and restart the computer.

3) The graphics card is loose, and unplugging the graphics card and reinserting it after shutting down usually solves the problem.

4) The system is overheating, including the CPU temperature is too high and the graphics card chip is too hot. You can install cooling fans in the appropriate locations in the case, or place the case in a well-ventilated area.

Causes and solutions for white screen when computer boots:

1) First of all: Before doing it, check whether the connection between the host and the graphics card is loose, and re-plug it, sometimes this will also cause a white screen.

b) There are two main reasons for the white screen of the computer to boot up:

The first reason is that the slot between the graphics card and the motherboard is not fully contacted, resulting in the white screen phenomenon, as long as the power is turned off, the chassis is opened, the graphics card is taken out, and the eraser is aimed at the gold finger to wipe it a few times, and then reinstall it back, sometimes it is handled like this, and it is good to reboot the computer, if it is not good to deal with it in this way, the performance of the main chip of the graphics card is reduced, and the video memory is soldered, which leads to the white screen of the display, and the graphics card is repaired or replaced, <>

The second reason, which is the problem of the LCD screen, generally occurs because of the phenomenon of bulging and discharging of the filter capacitor at the output end of the power supply circuit, leakage, and insufficient power supply of the driver board circuit, virtual soldering of the MCU core and the main chip, poor contact of the screen line, and the main chip of the screen circuit is soldering, insufficient power supply, or damage, and the horizontal or hard line caused by it, and it may be that the power supply insurance of the LCD circuit is damaged, which will cause the white screen phenomenon. Solution:

Jianyi sent after-sales or LCD maintenance department to repair the display, of which the screen line is most likely to have poor contact, <>

3) Detection method: The judgment of this phenomenon is to borrow someone else's good monitor to try it, and you can see the operating system, which means that there is a problem with the display, if you can't see the system, someone else's display is also a white screen, this is the problem of the graphics card, and you can replace the graphics card.

It is common for a computer to have a black screen and a blue screen, but it is really rare for a white screen to appear.

1. System reason: You can enter the safe mode, move the important content to other disks, and directly choose to restore or reinstall the system.

2. Cause of poisoning: The poisoning is easy to solve, and a comprehensive drug investigation is carried out after entering the safe mode.

3. Hardware reasons: you need to check the hardware, plug and unplug the memory again, and then check whether the hard disk has bad sectors, if there are bad sectors, you need to take it for repair.

4. Driver reason: WinXP white screen may be due to a problem with your graphics card installation or an incompatible graphics card driver. You can use the driver wizard, or remove the graphics card driver in safe mode, and then go back to the system and reinstall it.

That's all for you about what happens when your computer suddenly goes white.

2. Check whether the screen cable interface connected to the computer screen is loose or not connected, if so, reconnect the screen cable to repair.

3. Check whether there is too much dust in the chassis, clean the chassis in time, and plug in all the cables tightly.

White screen, the screen has no picture, only the backlight glows. Generally, there is a problem with the hardware of the screen, which may be due to the broken cable of the LCD or the graphics card.

How to repair the white screen of your computer.

After the LCD display is turned on, the displayed picture is completely white (white screen), which is the fault phenomenon of the white screen of the boot display. The failure of the black screen and blue screen of the LCD display is more common, the black screen and the blue screen are all problems with the system or hardware, and the failure of the white screen of the display is generally the fault of the LCD display itself.

The cause of the failure of the white screen of the boot display.

The white screen fault of the LCD display may be caused by the LCD panel driving circuit problem, the LCD panel power supply circuit problem, the screen cable contact poorly, the motherboard control circuit problem, etc. Since the LCD display screen is white after turning on, it means that the backlight and high-voltage generation circuit are working normally, but the LCD panel does not get the driving signal. If the screen disappears after the laptop is turned off, and then the screen is white again, it may be caused by a problem with the power strip.

From the analysis of fault phenomena, no matter whether the LCD display is turned on or off, as long as the power supply is plugged in, the high-voltage generating circuit is always in working state, and the backlight is always lit. In other words, the high-voltage generation circuit is no longer controlled by the switch, that is, the switching signal sent by the motherboard to the high-voltage generation circuit is out of control. Since the switching signal emitted by the motherboard microprocessor is generally controlled by several transistors, the fault may be a damage to the triode that controls the switching signal.

Fault repair ideas for the white screen of the boot display.

1. First disassemble the shell of the LCD display, and then check whether the screen cable interface is loose or not connected.

2. Then turn on the power switch of the laptop, and then use the multimeter to measure whether the power supply voltage of the screen cable interface is normal. If the supply voltage is normal, go to step 5; If it is not normal, then check whether the fuse resistor or fuse inductor near the output of the screen cable is open or damaged. If it is damaged, the damaged component can be replaced.

3. If the fuse resistor or fuse inductance near the output end of the screen cable is normal, then check whether the output voltage of the DC-DC voltage conversion circuit supplying power to the LCD display is normal. If the output voltage is abnormal, check the fuse resistor, PWM, controller, switch tube, inductance coil, filter capacitor and other components in this power supply circuit, and then replace the damaged components.

4. If the output voltage of the DC-DC voltage conversion circuit is normal, there are damaged capacitors and other components between the output end of the DC-DC voltage conversion circuit and the screen cable interface, and the damaged components can be checked and replaced.

5. If the power supply voltage of the screen cable interface is normal, then check whether the timing signal and driving signal in the LCD panel drive circuit are normal. If it is abnormal, check the output signal, input signal and power supply voltage of the chip that generates this signal respectively to determine whether the driver chip is damaged. If it is damaged, it can be replaced.

The maintenance of the white screen of the display screen is not as easy as the black screen and blue screen of the display screen, and it is necessary to master some knowledge of the circuit of the display screen, and it is best to ask professional display maintenance personnel to overhaul it.