How to get the computer screen is not lit, what to do if the computer screen is not lit

Do you want to ask how to solve the problem that the computer screen is not lit?

First of all, you can check whether the switch on the computer display is on, check whether the wire plug is plugged in, and whether the host is turned on. Replace the power box or unplug the power cord of the motherboard, short the black and green wires of the power supply with the wire, and see if the power supply fan turns on. Remove the fan and heatsink, pull out the CPU, clean up the dust, and put it back in.

There are many reasons why the computer screen does not light up, if your motherboard has a built-in graphics card, first remove the independent graphics card, and then connect the monitor cable to the motherboard's built-in graphics card, try to boot it. No, try changing the graphics card. Pull out the memory module, use a soft eraser to go through both sides of the gold finger, and insert it back.

Pull out the memory module, if it alarms when it is turned on, the motherboard and CPU are good, the memory module is bad or the graphics card is broken, replace it. Reinstall the system. Unplug all power supplies, including the button cell battery on the motherboard, let it stand for 5 minutes, and then turn it on to try, if it still doesn't work, you can only take it to the computer store for repair.

It may be that the monitor is not powered on, check whether the power switch and power adapter of the monitor are powered on; It may be that the connection cable is loose, check whether the ** interface between the monitor and the host is connected; It may be that the graphics card of the host computer is loose and there is no screen display, try to disassemble the computer and refix the graphics card; It could also be that the display itself is faulty and needs further overhaul after the sale. Here's a closer look:

1. It may be that the monitor is not powered on, check whether the power switch and power adapter of the monitor are powered on;

3. It may be that the host graphics card is loose and there is no screen display, try to disassemble the computer and fix the graphics card again;

4. It may also be that the display itself is faulty and needs further maintenance after sale.

The desktop computer boot screen does not light up, how can we solve it?

1: Power supply problem.

There is no display after powering on, the indicator light is not on, and the host has no sound. First see whether the display switch has been turned on, and then check the power supply, if the host power supply fan does not rotate, and the total power supply has output, then the main switching power supply. At this time, there are several possibilities, first of all, the power switch fails, and the power switch can be replaced;

The second is the internal fault of the switching power supply, although the power supply works but its output power can not meet the requirements, there is no other better way, it is recommended to replace the power supply or send it to a professional maintenance office.

The author once experienced that the sound of the computer when it was turned on was normal but not displayed, what happened? I couldn't find anything wrong after tossing for a long time. Then I found a place with a stable power supply and turned on and off the machine continuously and frequently.

Because the power supply will have a strong pulse at the moment of turning on and off, which stimulates the latching state of some parts of the power supply, the problem is simply solved.

2: The reset button is connected.

Some computers are equipped with a reset button, after a long time, the reset button of some computers does not pop up, and the microcomputer is in a state of restarting, so the screen is not displayed. In addition, dust accumulation and blockage of the reset key may lead to this situation, and the solution can be to clean the reset key with alcohol, etc., if it cannot be solved, you need to consider replacing the reset key.

3: CPU heat dissipation issues.

At present, the high-speed CPU generates a lot of heat, needs good heat dissipation, and many CPUs also have the ability to protect themselves, and will stop working when it reaches a certain temperature, the author encountered a computer, whenever it is turned on for about 2 hours, a black screen appears, and all peripherals cannot be used, including the power switch on the main chassis is also out of order, so I have to unplug the power socket to shut down, and then turn on the circuit, the machine cools down for about 5 6 minutes, and can last for nearly 1 hour after turning on. Open the case and then turn on the check,I found that the fan speed on the CPU slowed down significantly,Out of curiosity, I changed all the plug-ins on a good computer for up to 10 hours,The results are no problem,Finally, a few yuan for a new fan to get it。

4: Graphics card and memory problems.

Most of the cases of a black screen are here, and if there is an abnormal sound after booting, the first thing to consider is the graphics card and memory. Unplug it and observe it carefully, if there is no abnormal situation, clean up the next dust, wipe the gold finger, and then reinsert it, be sure to install the fixing screws, dust, looseness, poor contact, etc. are the main reasons for the black screen. Many friends who often disassemble and assemble the machine tend to ignore the installation of screws between the board and the chassis, but they do not know that these screws not only have the function of fixing the board, but also the role of grounding, and it is very unsafe not to install these screws.

Sometimes poor CPU contact can also cause a black screen, which is more common on some older computers with CPUs below 486.

There is no need to ask such a simple question, there is no point, and elementary school students know what to do. The computer screen is not lit up, generally caused by you accidentally touching the button to adjust the brightness of the computer screen, you can find the button to adjust the brightness of the computer screen and adjust the brightness again. If your computer screen is a CRT monitor, the screen does not light up, it may be that the life is up, you can use special software to test the brightness of the computer screen, if there is a problem, there is no need to repair it.

The electricity is not plugged in (plugged in).

The monitor doesn't turn on (tap the switch on the right side of the display).

The integrated graphics card is broken (for the independent graphics card).

The discrete graphics card is broken (for the discrete graphics card).

The fan turns, but the display does not light up (memory module detected).

There is no response when you press power on, and the monitor does not light up (the computer motherboard is not powered on).

There are several reasons why the laptop can turn on, but the screen doesn't light up

1. Sometimes the laptop is turned on, but the display is not lit, this phenomenon is generally due to the motherboard self-test does not pass or the screen lamp problem.

2. First of all, we must determine whether it is a real black screen or a pseudo black screen, the pseudo black screen is that the screen backlight is gone, and you can see the words on the screen if you look closely.

3. If it is a pseudo-black screen, it is generally that the lamp is broken and the lamp needs to be replaced. It is recommended to go to a professional repair shop for repair, if it is still under warranty, then it does not need to be cost.

4. If it's a really black screen, it's basically a broken graphics card or South Bridge. You can connect an external monitor to see,It's connected to the VGA port of the notebook,If the external monitor is also like this,It's basically a problem with the graphics card。 If the external monitor is normal, then it is the problem of the screen itself or the screen cable.

There is a 20% chance of a problem with the screen itself or a screen cable, and an 80% chance of a graphics card failure. Because the external output and the laptop screen output are two independent output modules. If the graphics card is broken, a replacement graphics card is generally fine.

Expand your knowledge. Workarounds for computer screen not showing:

1. It is not appropriate to update the graphics card driver, it is recommended to reinstall the system for testing.

2. Replug the monitor connection cable tightly;

3. If it is a discrete graphics card, it is recommended to check whether there is a capacitor on the graphics card that has exploded, and if there is, it needs to be sent to a computer store for repair;

4. Change a monitor to test it to see if it is a problem with the monitor.

In the first case, it is true that your monitor is broken, how can we judge this situation? The only way to do this is to use the simplest exchange method to confirm it. Take a different monitor, switch to this console, and see if there is a display.

If you don't have many monitors, you can take a laptop and connect this monitor to the laptop to see if it can be displayed.

The second situation is that there is a problem with the cable of the monitor. In many cases, the data cable of the display is not plugged in, resulting in the signal not passing, the display is not bright, or the data cable is faulty, which can lead to the signal transmission can not be passed.

The third case is that the host does not display the generation of signals. In this case, the problem is often with the graphics card. Check to see if the graphics card is broken, and see if the host has an alarm sound.

If you're using a discrete graphics card, unplug it and plug it into the integrated graphics card to see if the integrated graphics card has a signal. If you use an integrated graphics card, the memory part of the integrated graphics card is controlled by the memory, that is, you try to change the memory! If it still can't solve the problem, it can only be sent to the repair station for testing.

Troubleshooting method for computer monitor not bright:

1. The power light is on, which means that the power cord of the monitor is good and has electricity. No matter what the lamp.

2. Although the keyboard light is bright, it does not necessarily mean that the host is good. Listen carefully when you turn on the machine, there is a "beep" sound when the power is turned on, if there is, the display still has no display, indicating that the host signal is not transmitted to the display, it should be the data cable problem of the display. If there are many beeps after booting, listen carefully, if it is three long and two short, it means that the memory module is a problem, it may be a poor contact, find a point to open the chassis to deal with.

As long as there are many sounds, it means that it is an internal problem of the host. The chassis needs to be opened.

3. If you can clearly hear the gurgling sound of reading the hard disk and the hard disk light flashing after the ring, it must be a display problem, and the main suspicion is the data cable. At this time, check the two wires behind the monitor, follow the cables to look for them, one is connected to the power supply, and it is the power cord. One is connected to the host, it is the data cable, follow the data cable to find the connector connected to the host, tighten it, and see if there is a signal.

If you haven't already, find someone else with a good thread and try it instead. If that doesn't work, find someone who repairs the TV to fix the monitor!

If the laptop display and external display are not responding, you can try it as follows:

1.If the screen connection cable is loose, disassemble and reassemble;

2.On the external monitor, see if the screen transfer is set, that is, the main screen and the secondary screen, you can change it back;

3.It should be that the graphics card is broken, just change it;

4.The display wiring is broken and sent for maintenance.

After the laptop is connected to an external monitor, you need to switch the monitor by pressing a button to display it on the external monitor. Generally, the FN+F4 function key is used.

1.The power to the monitor is not on: Turn on the power.

2.There might be a problem with the connection between the monitor and the computer: Make sure the cable plug on the monitor is securely plugged into the display port on your computer.

3.Graphics drivers may be corrupted or outdated: Try updating your graphics drivers.

4.Your computer's power might not be on: Turn it on.

5.The monitor may be damaged: it needs to be repaired or replaced.

6.Your computer's BIOS settings may be incorrect. Try resetting the BIOS

<>Hello, this is a dead battery, it is recommended to connect it to the power supply or replace the landline battery.

1. Landline, the common name of fixed **, means that the ** machine that uses the **line, which is different from the mobile phone.

2. Monitors are also commonly referred to as monitors. The monitor is an IO device belonging to the computer, that is, the input and output cavity equipment. It is a display tool that displays a certain electronic file on the screen through a specific transmission device and then reflects the smile to the human eye.

According to the different manufacturing materials, it can be divided into: cathode ray tube display (CRT), plasma display PDP, liquid crystal display LCD and so on.

It may be that the monitor is not powered on, check whether the power switch and power adapter of the monitor are powered on; It may be that the connection cable is loose, check whether the ** interface between the monitor and the host is connected; It may be that the graphics card of the host computer is loose and there is no screen display, try to disassemble the computer and refix the graphics card; It could also be that the display itself is faulty and needs further overhaul after the sale. Here's a closer look:

1. It may be that the monitor is not powered on, check whether the power switch and power adapter of the monitor are powered on;

3. It may be that the host graphics card is loose and there is no screen display, try to disassemble the computer and fix the graphics card again;

4. It may also be that the display itself is faulty and needs further maintenance after sale.

1. First of all, we need to check whether the host is turned on, whether the power indicator is on, and whether the power button of the power strip is turned on. We check whether the power connection is normal from whether the keyboard light is on, press the numlock or caps cut key at the top left of the keypad, if the keyboard light or the caps light is on, it means that the system starts normally, but the screen is not displayed.

2. Then check whether the power cable and data cable connected to the monitor are connected to the correct position, and whether the switch under the monitor has been turned on.

3. We need to see if the graphics card of the computer is broken and whether there is an alarm sound from the host. If you're using a discrete graphics card, unplug it and plug it into the integrated graphics card to check if the integrated graphics card has a signal.

4. Whether the display itself is damaged, you can find another monitor, connect to the host and power supply, and see if it can be displayed normally. In this way, it is possible to check if it is damaged by itself.

5. The backlight of the LCD screen is broken, resulting in the inability to operate normally.