I don t know what s wrong with my computer, and when it shows it, it goes black

Check the power and data cables of the monitor to see if there is a problem I don't know if it is caused by Microsoft's black screen patch But you can check it Search to see if there is this file If so, please follow the following methods to solve it: Enter regedit in the run, press enter to open the registration expression Find the key local machine software Microsoft Windows NT CurrentVersion winlogonotify wgalogon Delete this key Restart the microcomputer (be sure to restart) Open C: Windows System32 after starting Find After deletion Open the registry again to delete the above key value Don't forget to turn off automatic updates Hehe Take a look at it OK.

If you don't have that file, it may be that the hardware is in poor contact or damaged or dust or the monitor cable or the display is in trouble, check the following conditions one by one: The computer has a lot of dust or moisture and the hardware is in poor contact due to shaking during the moving process The hardware is in compatibility with the hardware Hardware is damaged or faulty There is a problem with the graphics card The display is caused by other boards, such as memory, network card, etc.

Trouble, thanks!

Then you change the power cord and see, it may be a bad contact.

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 exclusion and substitution should be flexibly applied, and the phenomenon that occurs in a timely manner should be excluded.

If the computer can start up and run normally, but the screen can't show the starer, there may be the following reasons:

1.Graphics card issues: Check that the graphics card is properly inserted into the motherboard slot and that the graphics card power supply is secure.

2.Display issue: Check whether the power supply of the monitor is connected stably and whether it is turned on.

3.Memory issues: Check that the memory module is plugged into the Stable Kena and that it is correct.

To rule out whether the memory module is loose, it is recommended to pull it out and wipe it with an eraser, and reinsert it to restart the computer.

4.Motherboard Issues: Check the motherboard for damage or other issues.

5.Operating system issues: Try entering safe mode or testing with a different monitor to determine if it's an operating system issue.

It is recommended that you try to plug the device back in and check whether the cable connection is stable and normal.

According to your description, it is a typical poor contact, focus on the part of the computer connected to the monitor carefully (including plugs, sockets, connection connectors), and remove it completely if there is oxidation;

In addition, if the computer does not start properly, you can check it according to the following items:

1. First of all. Check the power supply; 220V AC power supply (plug and socket are usually called); Then check the output voltage of the computer power supply (desktop check the fan of the power supply, notebook can listen carefully to see if the CPU and graphics card fans in the machine are rotating);

2. See if the computer can "self-test"; If you can self-test, you can generally reinstall the operating system;

3. If it is a black screen, focus on the inspection part:

cpu；Mainboard; Memory; Graphics; display (desktop display); power supply (there is an output but the supply voltage is incomplete); and the plug-in parts and connecting wires of the above-mentioned parts;

4. Check and remove viruses, reset the BIOS, and reinstall the operating system.

Except for "D-Sub."

and "There is also a mode change in addition to DVI."

First of all, it may be that the keys of the display panel are short-circuited, resulting in irregular changes, and then it may be the internal circuit aging or short circuit, which may be related to humid weather, or dust accumulation.

In short, the problem is on the display, if the signal line is in good contact, you can try to use a patch cover when not in use, or use a hair dryer to remove moisture.

If it is not the cause of moisture, you can see if you can remove the back cover to sweep the dust.

The most direct way is to hold the monitor and fix it.

I think it should be the problem of the monitor itself, it is impossible to switch modes by itself, it may be that the circuit board inside has bad contact, if your monitor is under warranty, find a dealer. If it passes, you will pay for someone to repair it for you.

There are three possible flickering screen problems with the monitor:

1. Display aging problem;

2. Graphics card compatibility issues;

3. The frequency setting of the display.

I think the third possibility of your monitor is more likely. Improvements can be obtained by modifying the frequency.

The operation is as follows: bring up the desktop properties menu - click to set the label industry - advanced button monitor label industry to adjust the frequency of the monitor to below 85hz!

There are many reasons why a computer has a black screen, and the common ones are:

Shows poor contact of the data cable;

There is no power supply to the motherboard;

Poor graphics card contact or;

Poor CPU contact and overheating;

Poor contact of memory modules;

poor power performance;

Machine infection. cih

Viruses, BIOS

is destructively refreshed.

Microsoft black screen, please patch.

Oh God. It is recommended that you turn off the handlebar first.

Don't burn out the monitor.

Replace the power cord.