The monitor often goes black, what s wrong?

There are probably three reasons why the LCD screen is black:

First, there is no switching of signal input sources; Nowadays, most LCD monitors, especially large-size LCD monitors with 22 widescreens and above, are equipped with D-Sub and DVI-D dual interfaces, and some models even add more interfaces such as HDMI, so that when reconnecting the LCD monitor, the IC chip of the LCD sometimes cannot automatically identify the signal source.

The second is that the graphics card is faulty.

The third is game compatibility.

There are various reasons such as damaged monitor, damaged motherboard, damaged graphics card, poor contact of the graphics card, damaged power supply, damaged CPU, excessive temperature of components, etc.

Hello. Is it normal for the indicator light to be black when the monitor screen is black?

If it is, it should be that the high-voltage board of the display is not output, so the backlight tube of the display is not lit, so it looks like a black screen (look close to the monitor, there should be an image inside), it is recommended to send it to the repair shop to overhaul the high-voltage board. Generally, it costs dozens of dollars to repair high-pressure plates. If you change it, it's about 50.

But it's best to borrow a monitor and plug it in to see if it's a problem with the monitor, or if it's a problem with the computer.

Possible cause: the cable is not plugged in properly; Poor display; There is a problem with the graphics card. You need to check the meaning and determine what the fault is.

Causes

1. The power of the power supply is insufficient.

The external power supply is insufficient, causing some old monitors or some monitors with high power consumption to fail to start normally, which is caused by the black screen caused by the failure of the monitor itself.

One of the causes of the failure. Or the external power supply voltage is unstable, too high or too low, which may cause the display to not work.

2. The switch circuit is damaged.

The failure of the display switch circuit is the main cause of the black screen failure of the display. Simple ones such as power switch damage such as internal short circuits, common ones such as switch tubes.

damage or damage to its peripheral circuit components (lamps), etc.

3. The outgoing circuit is damaged.

The failure of the output circuit or picture tube and its power supply circuit is also the main cause of the black screen failure of the display.

Maintenance

The protection of the monitor should pay attention to the following points:

1) Prevent unstable currents.

2) Prevent interference from other electrical appliances on the display.

3) Wipe the screen of the monitor correctly when cleaning, do not spray the liquid directly on the screen of Muyin, and wipe it with a soft cloth.

1. Failure caused by the power supply of the host.

It is common for a black screen failure caused by a bad power supply to the host or poor power quality of the host. For example, when some new devices are added, the display has a black screen failure, and the quality of the power supply is not good, and the lack of power is the main cause of the failure. Replacing a high-power and high-quality power supply is the best solution to this type of failure.

2. Failure caused by the quality of accessories.

Poor quality or damage to computer accessories is the main cause of black screen failure of the monitor. For example, problems with the motherboard (and the CMOS of the motherboard), memory, graphics card, etc., may definitely cause a black screen failure. Book thick.

3. Black screen failure caused by overclocking.

Overclocking or overclocking parts that are not suitable for overclocking will not only cause a black screen failure, but also damage to accessories in severe cases.

1. Observe whether the power indicator of the display screen is in the light state, the light is not lit, it may be that the power plug of the display is loose, and plug it back in;

2. If the host is working normally, the power indicator of the monitor is on, but the monitor is black, it may be that the transmission line connecting the computer display rock answering device and the computer host is loose or malfunctioning, check the data transmission line, and replace the data cable if necessary;

3. If it is not a black screen caused by a loose power cord or data transmission cable, it may be that the graphics card of the computer host is loose, open the case of the computer, remove the graphics card, and clean up the dust;

4. Check whether the fan of the graphics card is working normally, if the fan is not working, it will cause the temperature of the graphics card to be too high and the screen will go black;

5. Check whether the CPU fan is working normally, if the fan does not work, it may be due to the high temperature of the CPU, the heat dissipation is not timely, and the computer starts to protect itself and causes a black screen.

There are times when our computer monitor screen goes black for a few seconds and then comes back, what is going on? Let me give you a brief introduction to the reasons why the computer monitor screen goes black for a few seconds and then recovers! Hope you enjoy it!

Analysis of the reasons why the computer monitor goes black for a few seconds and then recovers:

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;

The machine is infected with the CIH virus, and the BIOS is refreshed destructively.

Microsoft black screen, please patch.

Secondly: First, the frequent black screen is a kind of appearance of the display, which can only indicate that the monitor itself, and the host power supply, motherboard, graphics card, BIOS settings, and software are faulty.

Second, the main reasons for the black screen are as follows:

1. The graphics card driver is not perfect enough, and it needs to be reinstalled with a stable version.

2. The power supply of the host is insufficient, resulting in insufficient power supply of the AGP graphics card, and the insufficient power may be determined by the power factor of the host power supply, or it may be caused by poor heat dissipation.

3. The onboard power of the motherboard is insufficient, resulting in insufficient power supply of the AGP graphics card.

Analysis of the reasons for the black screen of the attached computer monitor:

Circumstance. 1. The display light is not lit.

1 Check if the power is on. If the monitor light is not on, it means that the power is not on, unplug all the plugs, and plug them back in every two minutes.

Circumstance. Second, the display light is bright green.

1 If the displayed light is normal, that is, the color is bright green, but the display is black, it means that the display is broken, and the after-sales service should be called for maintenance.

Circumstance. 3. If the monitor light is yellow.

First, check whether the cable between the monitor and the host unit is plugged in.

Unplug the two cables behind the monitor and the connector connected to the main unit, plug them back in after a few minutes, and see if the connector is loose or broken when plugging in.

Check if there is a problem with the memory.

If the memory is broken, the boot will sound an alarm and replace the memory module.

Check the motherboard. If it still doesn't work, then open the case, take the motherboard down, see if there is anything on the motherboard, see if there is any smell of burning, wipe off the dust, and put it back on.

4Check the graphics card.

Check if there is a problem with the graphics card, touch the graphics card with your hand to see if it is very hot, if it is very hot, let it cool down, wipe off the dust, and then go inside.

5 Check the hard drive.

Causes

1. If the graphics card is loose, unplugging the graphics card and reinserting it after shutting down usually solves the problem.

2. The system is overheating, including the CPU temperature is too high and the graphics card chip temperature is too high. You can install cooling fans in the appropriate locations in the case, or place the case in a well-ventilated area.

3. There is a problem with the plug of the monitor cable. The plug position should be adjusted.

MaintenanceThe protection of the monitor should pay attention to the following points:

1) Prevent unstable current.

2) Prevent interference from other electrical appliances on the display.

3) Wipe the screen of the monitor correctly when cleaning, do not spray the liquid directly on the screen, you can wipe it with a soft cloth.

This problem is usually a problem with the graphics card or monitor. Software problem: that is, the system or driver problem, you can change the system to try.

How to troubleshoot software issues. Press the DEL button to enter the BIOS settings when you boot up, if the same black screen for a few seconds is a hardware problem, otherwise it is a software problem. If it is a hardware problem, it means that the graphics card or monitor may not be in good contact, and the faulty accessories need to be eliminated by replacing the problem, and then sent for repair or replacement.

The black screen mainly has the following possibilities.

1. The graphics card is shut down due to high temperature and hardware protection. Please open the detection software, such as Master Lu or GPUZ to check the temperature of the graphics card.

2. If the temperature of the graphics card is normal, the computer power supply problem is more likely, when the computer power supply can not load the computer power, some power supplies will be shut down to protect the computer.

3. If the memory module is in poor contact with the motherboard, remove the memory module, wipe the gold hand with a pen eraser, and put it back into the special column: intermittent black screen.

The computer has infinite flickering screen, and the author has encountered it recently, and the final inspection found that the DVI port of the graphics card is damaged. Changing the HDMI output can be used normally.

The thing about graphics cards is that they generally always shut down automatically.

The display black screen failure is generally the following, which one is your monitor?