The computer screen is black but the host is still on, how to solve it

If the console is powered on normally, but the screen does not light up, most of it is caused by static electricity or oxidation of the motherboard, please try the following steps:

First, unplug the memory, wipe the gold finger (copper sheet) with an eraser, insert it into a different slot, and turn it on.

No, the second step is to take out the motherboard battery, find the clrcoms jumper of the motherboard, jump the jumper to the clearing pin (discharge), jump back, and turn it on. If that doesn't work, the third step is to take out the motherboard, touch the pins on the back of the motherboard with your hands, discharge, take out the CPU, and wipe the back of the board with your hands. (Hands touch the ground first, discharge).

Turn on, the machine must be good.

If none of these steps are possible, you'll have to send them to the workshop.

Simple, try changing memory.

First. Disassemble the chassis.

See if the fan inside is running properly.

Second. Turn off the case and touch each hardware with your hands to see if it is overheating, such as the graphics card.

CPU, etc. Third.

See if your power cord is plugged in.

Fourth. If this happens, press the numlock button on the numpad number 7 a few more times.

See if the keyboard light is on and off, if so, then congratulations, the case is fine, and the system is fine... The problem is with your monitor.

Or the power cord.

Or the cable that connects the monitor to the computer.

Unplug these threads and plug them back in to see if you can solve them, and beat them by hand in the middle of the night.

I'm going to sleep.

2 may have a heat dissipation problem with the CPU, this problem is also easy to solve, either buy silicone at the outlet, or go to the shop where the computer is repaired and ask him to add silicone to you. Note: Silicone is a necessity for CPU and CPU fan connections! Hope!

The computer boots up with a black screen and the host is running normally, which is a common fault phenomenon, teach you how to solve it yourself.

A black screen is a common phenomenon, especially on older computers or builds. There are many reasons for the failure of a computer black screen, such as a damaged monitor, a damaged motherboard, a damaged graphics card, a poor contact of the graphics card, a damaged power supply, a damaged CPU, etc.

1) The monitor is powered off, or the monitor data cable is in poor contact. In addition, the computer has been used for a long time, and the power cord of the monitor is easy to oxidize and break;

2) There is no power supply to the motherboard;

3) Poor contact or damage to the graphics card;

4) Poor CPU contact;

5) Poor contact of memory modules;

6) The machine is infected with CIH virus, and the BIOS is refreshed destructively;

7) Check the plugging and unplugging, if necessary, you can use a rubber to remove the oxide film on the gold finger;

8) If the floppy drive has a floppy disk, many times it will cause the computer to start or restart, and the computer will have a black screen and cannot enter the system. To avoid such situations, it is also possible to cancel the floppy disk boot item in the BIOS.

For the treatment of the black screen of the computer, the method of eliminating and replacing is basically adopted, and the principle should be based on replacing and eliminating the most suspicious parts first. For ordinary computer users, professional knowledge is insufficient, you can follow the following steps to analyze the cause of the failure, so that you can do it yourself.

Start by checking that the contact is good. Check whether the contact between the graphics card and the monitor is good, and whether the contact between the graphics card and the motherboard IO slot is good, and if necessary, remove it and reinstall it again to ensure that it is installed in place and in good contact.

If there is no problem with contact, it is best to try a different monitor to make sure that the monitor is fine.

If there is no problem with the monitor, check whether the CPU fan is running, if it is running, use a multimeter to measure whether the voltage output is normal to 12V, 15V, if not, you can change the power supply to give it a try.

If the black screen still appears, take out the components installed in the computer, leaving only the CPU, graphics card, and memory sticks, and the cause of the fault can be limited to the CPU, motherboard, and memory. Generally, if there is a fault in the memory, there should be an alarm sound. If the memory fault is ruled out, only the CPU and the motherboard are left.

Change to a normal CPU (should be compatible with the tested computer), boot the computer and re-test, if the black screen still appears, you can only change to a motherboard, and the problem should also appear on the motherboard.

A black screen may indicate a serious problem with your computer, and you may wish to eliminate it as described above when the black screen occurs. In the process of treatment, the method of elimination and substitution should be flexibly applied, and the phenomenon that occurs in time should be excluded and treated

You can long press the power button to power off, then check the black screen cause and fix it before starting it up.

Check the cable connected to the display.

[Simple Version].

1. Causes of the virus.

Second, the problem of hardware. For example, the power supply.

3. Software problems. For example, CPU temperature measurement monitoring software.

4. System file loss and misoperation.

5. Hackers attack you.

The specific solution is to redo the system, which can be excluded; If still dead.

It's just a hardware issue.

Professional Edition] Hardware reasons:

"Poor heat dissipation": the monitor, power supply and CPU generate a lot of heat during work, so it is very important to have a good ventilation condition, if the monitor is overheated, it will lead to color and image distortion and shorten the life of the monitor. Working too long can also cause the power supply or monitor to dissipate heat poorly, causing the computer to crash.

CPU heat dissipation is an important issue related to the stability of computer operation, and it is also the "hardest hit area" where heat dissipation failures occur.

"Dust killer": Too much dust in the machine can also cause crashes. If the floppy drive head or optical drive laser head is contaminated with too much dust, it will lead to reading and writing errors, and in serious cases, it will cause the computer to crash.

"Incompatible software and hardware": For example, 3D production and some special software may not be installed or started normally in some computers, and there may be problems with software and hardware compatibility.

"Memory module failure": Mainly caused by loose memory module and its own quality. Faults in memory module corners should be eliminated on a case-by-case basis, and if there is a problem with the quality of the memory module, the memory needs to be replaced to solve the problem.

"Hard disk failure": mainly due to the aging of the hard disk or due to improper use of bad sectors, bad sectors. In this way, the machine is prone to crash when it is moving.

You can use special tools and software to troubleshoot, if the damage is serious, you can only replace the hard disk. In addition, for motherboards that do not support UDMA66 100, you should pay attention to the setting of the hard disk operation mode in CMOS.

CPU overclocking": Overclocking increases the frequency at which the CPU works, and at the same time, it can also make its performance unstable. The solution, of course, is relatively simple, which is to return the CPU to a normal frequency.

"Hardware Resource Conflict": A common occurrence is a conflict between the settings of the sound card or the graphics card, causing an exception error. In addition, interruptions from other devices, DMA, or port conflicts may cause a few drivers to panic.

The solution is to start in "Safe Mode" and make appropriate adjustments in "Control Panel" - > System - > Device Management".

"Inferior parts": A small number of unscrupulous businessmen use low-quality boards, memory, and even counterfeit motherboards and polished CPUs and memory sticks when assembling machines for customers, and such machines are very unstable when running, and crashes are inevitable. Therefore, users should be vigilant when buying a machine.

Restore Bois, or redo the system.

Hello! The cause may be the host power supply damage or failure resulting in voltage instability, or the graphics card problem, the host hardware damage, or the display screen failure, you need to carry out a step-by-step investigation of the cause of the failure, the operation method is as follows: 1. Detect whether the computer power cord and the monitor connection cable are damaged or loose.

2. Open the side cover of the main unit, clean up the dust and check whether the interfaces of the motherboard are in good condition. 3. Eliminate whether the display screen is faulty, you can use other display screens to test whether it can be displayed normally, if the screen is still black, it may be that there is something wrong with the motherboard of the computer, and you can only go to the maintenance point for maintenance.

If the computer screen is black but the console is still on, you can try the following methods:

1.Check the computer connection: Check whether the connection between the computer and the monitor, keyboard, mouse and other devices is loose or disconnected, and plug it in and out again.

2.Check the power supply: Check whether the power supply is working properly, and try to plug and unplug the power cord again, or replace the power cord.

3.Check the graphics card: If it's a discrete graphics card, try replugging the graphics card or replacing it.

4.Check the memory module: You can try to reinsert the memory module or replace the memory module with a grandchild.

5.Check the drive: You can try to reseat the drive, or replace the drive.

If the problem cannot be solved by the method of trouser height, it is recommended to contact a professional computer maintenance personnel for maintenance.