The computer screen has been white since it was turned on10

The display problem is generally dozens, or even hundreds, and it can't be used if it's serious.

Computer white screen repair method:

After the LCD display is turned on, the displayed screen 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 problems with the system or hardware, and the failure of the white screen of the display screen 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 drive 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 no longer controlled.

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 computer that the pen answerer first remembers, and then use a 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 voltage at the output end 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.

At the same time, press the keyboard shortcut Ctrl+Alt+del, start the task manager, and after the task tube vertical rationalizer pops up, click on the file option, and run a new task, type, and then confirm the file brother to try.

If your computer is experiencing a white screen, there are several possible reasons:

Display connection issues: Check whether the monitor is well connected to the computer and whether it is loose or disconnected.

Graphics card driver problem: It may be that the graphics card driver is faulty, it is recommended to reinstall or update the graphics card driver Ant program.

System Corruption: Try booting your computer in safe mode and running a system repair program to fix possible corrupted system files.

Viral infection: A virus scan is performed to determine if a viral infection is present.

If the above methods do not solve the problem, you can also try to restore the system or reinstall the operating system. If you're not sure how to do it, it's advisable to seek help from a professional.

If the white screen is in the computer that has been opened, press the three keys Ctrl plus Alt and Delete, which is to bring up the task manager of the system, and there are restart, shutdown and other operation buttons in this window. If the computer is not turned on in the first place, it is not possible to directly press the three keys of Ctrl plus Alt and Delete to achieve the purpose of booting up. There are several scenarios for computer white screen recovery:

1. If the white screen is displayed directly when booted, the computer cannot be started, this situation is mostly caused by the damage of the screen line or LCD screen (notebook), replacing the screen line or screen can solve the fault, sometimes the screen line and the screen are not too seriously damaged can also be repaired directly. 2. Although the probability of the graphics card causing a white screen failure is low, it is not nothing, if it is really caused by the graphics card, you can remove the graphics card first, then find the eraser, gently wipe the metal part of the graphics card with the eraser, after wiping, clean up the slot, after the cleaning is completed, reinsert the graphics card, and then restart the computer. 3. If it is in the process of use, the computer has a white screen for no reason, you can find another monitor to connect to the port of this display, if the display also appears Bailing land screen phenomenon, then generally speaking, the computer's graphics card is broken, the best way to deal with it [oro