The computer doesn t light up the black screen, and the laptop suddenly turns black and the screen d

There are many possibilities for this kind of problem.

First of all: you need to rule out whether the black screen is due to software or a wrong setting on your computer. caused by the problem.

If it's determined that it's not a software issue.

See below: For example:

1) Your "outlet" load is too low. Buy a large load, such as a 16A 4000W outlet.

2) "Is there a problem with the power supply" inside the computer case?

3) Voltage problem... Is there a problem with your wiring... This probability is not very high).

4) If your computer is new, it may be caused by incompatibility between hardware.

5) There is a problem with the computer motherboard.

If this problem still occurs after changing to a new socket, go find a professional place to repair the computer and check that there is a problem with the hardware.

There's another way for you to see.

Click on the "Start Menu" and double-click the "Power Options" icon, in it, there is an item that says "Turn off the monitor (M)", change the content to "Never".

If you don't see the "Power Options" icon in the Control Panel, click on the Control Panel and "Switch to Classic View" in the top left.

There's only such a thing, I haven't seen it, you call the customer service of your monitor

Hello, First of all, check whether the power supply connected to the notebook is good, whether the power indicator is on, and friends with conditions recommend using a multimeter to test whether the power supply of the notebook has a voltage output marked in the power label. When there is a power output, connect the laptop, then turn it on, and check whether the laptop power indicator is on.

If the power indicator is on, the cooling fan port is windy, but the display screen is still black, most of the cases are due to the internal wiring fault or hardware failure of the notebook, such as loose internal memory modules of the notebook, graphics card failure, and display panel failure. At this time, it is recommended that you use the external monitor of the computer, which is the monitor of the general desktop, and connect it to the external display interface of the notebook, if the display is normal, it basically excludes the possibility of damage to the motherboard and graphics card. If it is abnormal, there is a problem with the motherboard or graphics card.

In addition, loose memory may also cause a black screen at boot, friends who understand technology can disassemble the machine to see, users who do not understand it are recommended to take it to a professional repair shop for maintenance or send it for warranty.

1. There are two types of black screens: pseudo-black screen and true black screen. If the indicator light of the HP laptop responds, but the screen is not lit, carefully use the flashlight to shine the pseudo-black screen that can see the image, and change the backlight tube.

2. If the HP laptop does not have any image but the screen is slightly brighter, this is a typical symptom of the graphics card door chip, and it needs to be replaced with a new and improved chip.

If this problem occurs, first unplug the battery, just try to turn on the power supply of the power supply, see if the machine has a response, if there is still no response, then send it for repair as soon as possible according to the warranty status.

First of all, check whether the memory module is loose, or because the gold finger oxidation causes the motherboard to not recognize the memory, at this time, unplug the memory module, wipe it clean before inserting, and start the computer, which will generally solve the problem. If the motherboard has an integrated VGA interface, you can use the graphics card interface of the motherboard, and then plug in the graphics card after judging the problem, you can also take off the COMS battery of the motherboard mountain, turn off the power, and install it after a few minutes.

Finally, consider the motherboard or CPU.

If there is a problem with the CPU, check whether the power supply is normal.

The computer can not enter the system when it is turned on can also be divided into two situations: the self-test can not enter the system but there is a hardware problem, and the self-test can not enter the desktop is a system or driver problem.

One. The self-test can pass, but it can't enter the desktop, it is a problem that belongs to the operating system or driver:

Why does the computer fail to enter the desktop normally or the blue screen of death after repeated restarts?

In the case of excluding viruses, it is generally due to the installation of the ghost version or other modified version of the operating system, because a large number of drivers that are not suitable for your hardware device are integrated in advance, resulting in the system not correctly identifying and loading the necessary hardware devices of the system.

If you don't want to reinstall, try to boot F8 into safe mode to uninstall the incompatible driver of the hardware device (that is, right-click the device in the device manager) >Properties" driver does not have the driver of the "Digital Signature Program" Microsoft Windows Hardware Compatibility Publisher), after booting the automatic identification of the hardware device, reinstall your own ** driver that has passed the Microsoft Digital Signature Certification (WHQL), Then restart your computer again to see if it improves.

The second is that there is a conflict caused by the existence of duplicate software in the system (such as installing 2 or more anti-software, firewalls, and ad blocking).

If you confirm that it is not a system or software issue, you need to test the hardware in the following order, first the memory is the most likely, then the CPU, then the hard disk, and finally the graphics card, and the motherboard basically does not have a blue screen.

In addition, it is necessary to check whether the machine is overheated due to poor heat dissipation (if so, it is necessary to install a more powerful radiator, reapply thermal grease, and replace a powerful fan).

Check the motherboard capacitors for bulging tops (if they are, they must be replaced immediately).

It is also necessary to see if the chassis power supply is insufficient and the output voltage is unstable (if so, it must be replaced immediately).

If the self-test fails, it can't be heard"Drops"One sound, there must be a hardware failure, and the alarm sound of the small horn (buzzer) needs to be preliminarily judged in order to reduce the scope of hardware failure. Please refer to your motherboard's manual for the specific meaning of the boot alarm sound.

Two. If the self-test fails, there must be a hardware failure

The computer booted up and self-tested, but I didn't hear it"Drops"What to do with a bang?

If you can't self-check after the computer starts, and you don't hear a drip, it must be a hardware failure.

Does the book have an external monitor interface?

If you have it, plug it in and take a look, so that you can know if it's a problem with the graphics card or the display, and the screen is also black when you restart the computer self-test?

Move the cover a few more times when you turn it on to see if the screen flashes.

It should be that you accidentally picked the screen brightness to the lowest, find the button to adjust the brightness in the fn function key of your notebook and pick it back or use the light to adjust the brightness in the control panel.

The line is not plugged in, there is a line behind the display screen and the host is plugged in, and it is all dotted with the line, and it is good to try it.

Looks like this happens when your laptop is running low on battery!

It may be that there is a problem with the backlight of your display, press the shortcut key to turn on the backlight and it doesn't work, go to the after-sales service to take a look.

"You can also see the shortcut on the computer desktop when you shine on the screen with a lamp", it is certain that the background light is not on, and the rate of LED backlight failure is very small, so, it is speculated that there is a problem with the boost circuit that supplies power to the lamp, and it is best to find a professional maintenance to repair it if there is no electrician foundation, and find after-sales service during the warranty period, don't look for them if you are out of warranty, basically you will have to change the board, and you won't want half a book of money.

Graphics card or just the monitor is out of order.