What should I do if the computer display is not lit and the keyboard indicator is on?

It could be that the graphics card or monitor is faulty. If you are using a discrete graphics card, you can switch to an integrated graphics card and check if the output is normal**. Change the monitor and ** cable to see if it can be displayed normally.

Can you use the keyboard caps lock key to switch case after booting, if it can mean that the system is running normally, but it shows that it is faulty. Here's a closer look:

1. It may be that the graphics card or monitor is faulty; If you use a discrete graphics card, you can unplug the discrete graphics card and try it with the motherboard integrated graphics card, or change the output port of the graphics card**; If it can be turned on normally, the former can try to use alcohol or an eraser to clean the gold finger part of the graphics card, and the latter may be the output port is faulty;

2. Try to change the monitor, but the probability of the monitor is relatively small, if the display indicator is green after turning on, but there is no image, it may be that the monitor is faulty;

4. After booting on, the keyboard light is on, press the caps lock key on the keyboard, that is, the uppercase switch key, if the uppercase lock light can be switched, it means that the host has been able to start normally, but the display part is faulty.

There are four reasons why the indicator light is on and the screen is black:

The first reason: This is the memory and graphics card of the notebook are oxidized, resulting in poor contact with the memory slot or graphics card slot, resulting in the inability to turn on, and the black screen, the probability of it appearing black screen accounts for 60%, processing method:

It is to remove the power supply, open the back cover of the notebook, take out the card slot of the memory, if it is not an independent graphics card soldered to the motherboard, also take out the card slot, align the part of the memory and the gold finger of the graphics card (that is, where there is a copper sheet) and wipe it back and forth with an eraser at least 6 times, blow the ash, and then insert it back, cover the back cover, and turn on the computer generally.

The second reason: is that the video memory of the notebook graphics card is soldered, the performance of the main chip is reduced, the graphics card BIOS is disordered, and the control power supply IC is problematic, which will cause the graphics card to fail to work normally, that is, the graphics card is broken, because the graphics card is broken, the screen will naturally be black, and the treatment method: Jianyi repairs the graphics card, or replaces the graphics card.

The third reason: the boot circuit of the notebook motherboard is faulty, such as clock, reset, power supply, MOS tube, etc., which may cause failure to boot, black screen, IO problems, unable to start the computer, black screen, etc., solution: send after-sales or repair shop to repair the motherboard.

The fourth reason is that the screen cable of the notebook is broken or poorly contacted, resulting in no image signal transmitted to the screen for display, that is, a black screen.

Desktop host: 1. If the CPU is overheated, clean up the dust of the CPU fan, and replace the fan if there is a problem with the CPU fan.

2. If the memory is caused by poor contact, plug and unplug the memory, wipe the gold finger part with an eraser, and re-insert it.

3. If the discrete graphics card is in poor contact, plug and unplug the graphics card, wipe the gold finger part with an eraser, and re-insert it.

4. If the motherboard BIOS is abnormal, unplug the power cord, cut off the motherboard button battery, wait for three minutes, and then reinstall the motherboard.

5. If the above operations cannot solve the problem, it is recommended to send it to the maintenance center.

Notebook: 1. Remove the battery on the back of the notebook, connect the computer only with the power adapter, and try to turn it on, if the boot is normal, then it is caused by poor battery contact or battery failure.

2. Only use the battery, do not connect the power adapter, if the boot is normal, then it should be caused by a problem with the power adapter or a short circuit in the power interface of the notebook.

3. Unplug the power cord, remove the battery, and press and hold the power button for 30 seconds without letting go. Try to boot up, if the boot is normal, then it is only caused by the abnormal BIOS of the motherboard.

4. Unplug the power cord, remove the battery, open the back cover of the memory, plug in and unplug the memory, wipe the gold finger part with an eraser, and plug it back in.

5. If the above operations cannot solve the problem, it is recommended that the notebook be sent to the maintenance center for testing.

Computer failures are divided into hardware failures and software failures, hardware failures refer to hardware problems, software failures refer to system problems, hardware problems we take the plan is to first judge whether it is true damage or false damage, if it is true damage, we repair the principle first, false damage, we can directly remove and reinstall; The worst we can do is reinstall the system. Recently, many friends have consulted such a problem, that is, the computer host is running normally, but the monitor is not bright, what is going on? For computer novices, how to solve it with bare hands?

Here's how to fix this common computer failure!

The monitor doesn't light up, and the host is running.

Most of the phenomena occur on old computers or computers that have not been used for a long time, and the main reasons for this phenomenon are usually as follows:

Cause 1: Poor contact of memory modules.

For a long-term computer or a computer with dust in the computer host, it will lead to poor contact of the memory module, and the instructions sent out by the processor will not be able to get the memory processing will be stuck, which will cause the computer to not form a complete operating system, resulting in the host running, and the display can not be lit.

After plugging and unplugging the memory module.

Reason 2: The discrete graphics card is not in good contact.

For the computer with a separate graphics card, it will cause the computer to malfunction if it is not used for a long time or it is too much dust, the computer processor sends instructions through the memory, but the graphics card cannot recognize the instructions, the display will not light up, and the host will stop running and repeat, at this time, we only need to take out the graphics card, and then use a cleaning tool to clean up the card slot of the graphics card, and then wipe the gold finger of the graphics card to solve the problem.

Reason 3: CPU feign death.

For long-term computers are most prone to this phenomenon, the hardware of the computer host is in a working state, continuous operation, but the computer display is not lit, this is the CPU faked, the computer can not issue instructions, the computer monitor can not receive instructions, and then can not display the picture, at this time we first remove the radiator, use the thumb to press the CPU, the process of turning on the computer, at this time the computer display can be lit.

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Reasons and solutions for the computer boot display showing a black screen with no signal:

1. The interface between the signal cable of the computer monitor and the computer host is loose, and the signal cable and the interface need to be plugged in tightly.

2. The signal cable of the computer monitor is damaged and needs to be replaced.

3. The computer motherboard is damaged and needs to be replaced.

4. The computer graphics card is loose and needs to be plugged in tightly.

5. The computer memory is burned out, and the computer memory card needs to be replaced.

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Computers are office supplies that we often use in our daily life, and it also greatly facilitates our learning. The computer may malfunction when it is in use, what happens when the computer boots up and the display shows no signal and black screen? What is the reason for this? Let's take a look.

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1. It may be that the interface between the signal line of the computer monitor and the computer host is loose, resulting in no stable power connection to the computer display screen and a black screen phenomenon.

Solution: The signal cable of the computer monitor needs to be plugged in tightly.

2. It may be that the signal line of the computer monitor is damaged, and the computer may be used for a long time, and the signal cable may be aged.

Solution: You need to replace the signal cable of the computer monitor.

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3. It may be because the computer motherboard is damaged, and this problem is easy to solve.

Solution: You need to replace the computer motherboard.

4. It may be because the graphics card of the computer is loose, resulting in the display not being able to display normally.

Solution: The graphics card needs to be plugged in tightly.

5. It may be that the computer's memory card has been burned out for some reason.

Solution: You need to replace the memory card of your computer.

The computer display is not lit, the keyboard indicator is on, first check whether the connection line of the monitor is loose? Secondly, check if the graphics card inside the host is loose?

Causing the computer to not form a complete operating system, resulting in the host running, the display can not light up, at this time we only need to pull out the memory stick, use the eraser to gently wipe the memory stick.

Summary. Hello, it is recommended to troubleshoot your computer in the following order. Check your monitor's power connections

Make sure the power cord of the monitor is properly connected and check that the power switch is turned on. You can also try using a different power outlet to troubleshoot power issues. Check the signal connection of the monitor:

Make sure the monitor is properly connected to the computer. If you are using a VGA or DVI connection, make sure the connection is secure. If you are using an HDMI or DisplayPort connection, check if the connection is loose or damaged.

Check your computer's graphics card connection: If your computer has a discrete graphics card instead of an integrated graphics card, make sure the monitor is connected to the correct graphics card slot. Sometimes, plugging in the wrong slot can lead to display issues.

Try restarting your computer: Sometimes, restarting your computer can fix the display issue. Try pressing your computer's power button and restarting it to see if you can restore the normal operation of your monitor.

For your reference, I hope it will help you, good luck!

Hello, it is recommended to troubleshoot your computer in the following order. Check your monitor's power connection: Make sure your monitor's power cord is properly connected and check that the power switch is on.

You can also try using a different power outlet to troubleshoot power issues. Check the signal connection of the embedding history indicator: Make sure the monitor is properly connected to the computer.

If you are using a VGA or DVI connection, make sure the connection is secure. If using an HDMI or DisplayPort connection, check if the bend reed connection is loose or damaged. Check your computer's card connection:

If your computer has a discrete graphics card instead of an integrated graphics card, make sure the monitor is connected to the correct graphics card slot. Sometimes, plugging in the wrong slot can lead to display issues. Try restarting your computer:

Sometimes, restarting your computer can fix the display issue. Try pressing your computer's power button and restarting it to see if you can restore the normal operation of your monitor. For your reference, I hope it will help you, good luck!

I'm sorry I don't understand, but can you elaborate on that?

Check your monitor's power connectionsCheck your monitor's signal connectionsCheck your computer's graphics card connectionsTry restarting your computer.