After the computer is turned on, the keyboard and mouse do not respond, and the screen is black

The computer mouse and keyboard didn't respond to what's going on.

After the computer is turned on, the black screen keyboard does not light up After analysis, it can be concluded that there is a hardware problem, and the specific solution can refer to the following steps:

1. Check the monitor first, and check the connection problem of the monitor first.

2. If the monitor connection is fine, if the replacement of the spare monitor can be restarted, it proves that the monitor is faulty.

3. Replace the graphics card, if it returns to normal, it proves that the host hardware is faulty.

4. Then check the keyboard for poor contact.

5. If you make sure that the keyboard contacts normally, it may be a problem with the keyboard hardware, and it is recommended to replace the keyboard.

By troubleshooting one by one, you can find the problem and solve it.

If there is no alarm sound when the machine is turned on, it means that the hardware should be normal. Otherwise, change the hardware. If so, wipe it several times to keep the machine in a stable humidity environment. The main topic is the cause of oxidation. The workaround is to reinstall the system.

This situation must be a hardware failure of the computer host, unplug and replace the memory, independent graphics card and other hardware, check whether the motherboard is obviously damaged, replace the host power supply, if it cannot be solved, it is recommended to find a professional to detect and repair the computer host.

If the computer boots up black, you can remove all components except the CPU, graphics card, and memory module, and then power on the computer. If there is a fault in the memory, there should be an alarm sound. If it is not due to memory, please change to a normal CPU and re-test it when you boot it.

If the black screen still appears, you can only change the motherboard, and the problem should also appear on the motherboard.

It's usually a problem with the memory module, just unplug it and plug it back in.

If not, check the CPU fan and heatsink for dust, and if so, remove it, clean it, and put it back on.

If it doesn't work, buckle the motherboard button battery and put it back on after a while.

It means that the computer host is faulty and does not start normally.

You need to check whether the switching power supply, motherboard, CPU, memory, graphics card and other equipment are faulty or have poor contact, causing the host to fail to start normally.

Replace the silicone grease on the CPU.

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The computer has a black screen when it is turned on, and there is no display on the monitor after it is turned on, which can be subdivided into the following situations:1The computer has a black screen when it is turned on, which shows that the power supply fan and CPU fan are not moving, the indicator light on the motherboard is not on, and the computer has no response.

At this time, you should first check whether the power socket is energized, whether the various power cables are good, whether the connection is normal, if it is confirmed, then please replace the power supply and try again. 2.The computer boots on with a black screen, the power fan rotates normally, the CPU fan does not move, and there is no alarm sound, which shows that the motherboard has no response.

At this time, you should first check whether the power supply and the motherboard's power connection socket are plugged in tightly, if it has been checked, it may be that the motherboard is seriously damaged or the connection between the power supply and the motherboard is damaged. Try to change the power supply to rule out the second possibility; Please check whether the motherboard is abnormal, such as whether there is a capacitor bulge (broken down), whether there is obvious damage to the motherboard surface that causes the line to be blocked, etc., you can take it to the maintenance station for inspection, and if possible, you can replace the motherboard to make sure. 3.

The computer is turned on with a black screen, and the power supply fan and CPU fan are rotating normally, but the monitor has no display and no alarm sound.

The computer boots up the black screen mouse and keyboard are not lit, it may be caused by the computer running out of power, it is recommended that the user check the power connection, see if the power supply is powered, if the power supply is normal, it may be that the power supply is broken, you can replace the power supply device to try, exclude the above factors, it is recommended to contact the after-sales service in time for relevant testing. Computer skills: Windows10 system can set the mouse speed, if the user wants to set, just open the computer settings, click on the device options on the computer settings page, then click on the mouse options, select other mouse options, and then adjust the speed.

Windows 10 system can clean up the computer disk, just double-click the computer on the desktop of the computer, then right-click the disk, open the properties page, and then select "Disk Management", and clean up according to the prompts.

1.If the monitor is powered on but no signal is displayed, turn off (if short pressing the power switch is invalid, press and hold the switch until the power indicator goes out or directly unplug the power cord) Power off the case, plug in and unplug the memory module again, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), and then turn it on after installation. 2.

If the above operations do not work, turn off the power and turn on the chassis, reinsert the graphics card, and plug in the data cable between the monitor and the graphics card. If it still doesn't work, then consider the graphics card damaged, then replace it with a new one. 3.

If the monitor is not powered on (the indicator light is not on), look at the back of the monitor, plug the power cord that connects to the monitor upwards, and check that the other end of the power cord is powered on to the outlet. 4.If the display can be displayed when connected to another monitor or the display of this machine is connected to another normal host and still cannot be displayed, the monitor is damaged and needs to be repaired.

Reply: If it is helpful to you, please give a thumbs up, thank you!

Summary. Hello dear, happy to answer your questions.

Generally, this situation is caused by oxidation or poor contact of the gold finger in the memory. In this case: 1. Unplug the computer power cord first, and press the on/off key on the chassis 5-6 times.

Releases the residual charge of the motherboard. 2. Then open the side panel of the chassis and plug and replace the slots of the memory. 3. Remove the CMOS battery from the motherboard and install it after 1 minute.

The computer has a discrete graphics card, so it's best to plug and unplug the graphics card. After the above operations are completed, the computer is powered back on.

After the computer is turned on, the black screen keyboard and mouse light up.

Hello, dear, I am happy to answer your questions, generally this situation is caused by the oxidation of the memory gold finger or poor contact. In this case: 1. Unplug the computer power cord first, and press the on/off key on the chassis 5-6 times.

Releases the residual charge of the motherboard. 2. Then open the side panel of the chassis and plug and replace the slots of the memory. 3. Remove the CMOS battery from the motherboard and install it after 1 minute.

The computer has a discrete graphics card, so it's best to plug and unplug the graphics card. After the above operations are completed, the computer is powered back on.

The keyboard is lit and the mouse can move.

How long has your computer been used.

I just bought it back.

1 When the monitor screen is black and there is no image display (However, the current monitor on the market will display the screen when there is no signal from the host.)"There is no signal line connection"First, check whether the host power supply is well plugged in and whether the fan of the power supply is rotating. Are the power indicators and hard disk indicators flashing on the host panel? Because if the host power supply is not working or the motherboard is not powered, the display will not have an image display when it does not receive a signal.

It should be that you have launched too many things, or the computer is poisoned!

What should I do if I get poisoned?

It can be detected and cleaned with antivirus software, such as 360 antivirus.

Click Full Scan, not Quick Scan.

But they couldn't get in.

Dear you force the shutdown first.

Thanks, it's already turned on <>

Do you have any questions? <>

I sincerely hope to help you and wish you a happy life <>

If you think it is helpful to you, please give it a hard time to like it<> thank you! [Bixin] [Bixin].

1. Press the keyboard combination "win+r" at the same time to bring up the "run" window, and enter "msconfig" and click the OK button.

2. In the General tab, click Select Selective Startup, unload the startup items, and select Load System Services.

3. Next, check Hide all Microsoft in the Services tab, and then click Disable All.

4. Next, click "Start", and then click "Open Task Manager".

5. Next, disable all startup items, and then restart the computer to solve the problem.

If the screen goes completely black, the most likely is a hardware issue. I recommend checking the hardware, mainly the monitor, power supply, CPU or motherboard are all possible. If nothing happens from the main unit, including the fan not turning, it may be a power supply issue.