After the computer monitor is assembled, the monitor keeps flashing and cannot be turned on

There are many reasons for the failure of the computer to turn on the black screen, such as the display is damaged, the motherboard is damaged, the graphics card is damaged, the graphics card is in poor contact, the power supply is damaged, the CPU is damaged, etc. 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.

1.Unplug the data cable connected to the monitor and the console, and turn on the power switch of the monitor separately. Generally, if the display is normal, it will display the manufacturer's information of the display or a prompt that the monitor is not connected, if it can be displayed normally, it indicates that the display is unlikely to be damaged.

2.Check that the exposure 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.

3.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.

4.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.

Subject,It is recommended to try a different monitor first。 If the problem persists, it's a host problem.

Check and detect the graphics card, display the signal cable.

The method is to adopt an alternative approach.

Inspect the motherboard battery.

Electricity. Because the motherboard battery is powered off, it will cause the spine-based computer to power up and black screen.

If there is no problem with these cards, there is something wrong with the motherboard. It is recommended to send it for testing and maintenance.

Extended content: The most common problem with the computer booting display is whether the hardware such as memory, graphics card, and hard disk is in good contact with the motherboard, as long as one of them is not in contact, it may cause the display to be black, so if it is a computer that has been used for a long time, it is likely that there is too much dust, resulting in poor contact or looseness, etc. Most of them are caused by poor contact or hardware damage, and can be repaired using the "minimal system method" combined with replacement inspections.

Improper installation of new equipment and improper replacement of hardware is more likely to cause black screen.

The "minimum system method" refers to keeping only the main field round board, memory module, CPU, and graphics card.

Basic equipment such as displays and power supplies are first powered on to check the minimum system composed of these basic equipment, and after checking and confirming that the minimum system retained is working properly, other equipment is further checked. When using the Minimal System Method, it is recommended to check whether the monitor is working properly before opening the chassis and removing other devices.

1. Display the refresh rate.

Check whether the settings are correct: on the desktop of the computer.

In the blank area, you can see that the refresh rate of the monitor is set to [Right-Properties] -[Settings] - [Advanced] - [Monitor], which is the reason why the monitor screen keeps shaking. Set the new frequency to above, and then click [OK] to return to the desktop;

2. Check the graphics card driver.

Correct, sometimes we enter the refresh rate of the computer's monitor, only to find that there is no refresh rate to choose from, or a laptop.

Keyboard shortcuts cannot be used.

Adjusting the brightness is caused by the graphics card driver not being installed correctly, you can go to [Device Manager].

to see if there is a yellow exclamation mark next to the graphics card, or right-click and select Update Driver;

3. Whether there is electromagnetic interference around the computer. Observe whether there is a strong electric field or strong magnetic field interference around the computer monitor, magnetic field interference is very easy to cause the computer screen to shake or flicker, elimination method: place the computer in another open place and then observe, you can also go to another place to take a good computer to test and eliminate, try not to close the display near large electrical appliances.

You can also restart the computer monitor to see, generally the current display has an automatic degaussing function in the opening process;

4. Display hardware problems or power supply problems, you can use the elimination method to use other monitors to check whether it is the computer software or the display itself, among which the computer screen flickering encounters the most display power supply problems, and many of them are caused by the aging of the display.

This is obviously caused by a problem with the power supply of the display and an unstable voltage.

It's also possible that the monitor doesn't connect well.

If there is no problem, then there is a problem with the monitor, and you can replace it with a monitor.

The display does not light up, and one trick to judge whether the host is normal.

Analysis: If the host indicates that the copy light is on or off, the screen is not powered on (the power indicator is not on) or the screen is powered on but there is no signal or "no sighal" is displayed, the former means that the power is not on or the connection is poor, and the latter is generally the memory module is not in good contact.

Recommendations:1If the monitor is powered on but no signal is displayed, turn off the power and turn on the case, plug in and unplug the memory module again, and wipe the gold finger with an eraser (the back of the thumb fingernail is also fine) in one direction, and then turn it on after installation.

If you don't know how to operate, then it's simple: kick the chassis with one kick (note the location: the front of the shell on the left and right sides of the chassis that has no interface at the back).

If it's a notebook, you can't kick it, but it's the same for other operations.

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.

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.

Here are a few steps:

1.Unplug the power cord of the monitor and plug it back in, see if there are words such as "no signal", if there is a statement that the monitor is good, exclude the monitor.

2.Reconnect the data cable between the monitor and the host, plug it in firmly, and then it will be a problem with the host3The memory of the graphics card is loose or not.

4.Send it for repair.

First rule out whether there is a problem with the display, no problem is that the hard disk cable is loose, this situation is that the hard disk does not boot up, the first two are excluded without a problem, then it is serious, it may be a problem with the memory, the system, or the hard disk is broken.

If you can hear a tick after the self-test, it proves that there is no problem with the main unit, and the problem will appear on the monitor. Look at the indicator light of the display first, if it is after pressing the switch, the green light will turn orange (usually this color), at least it proves that the power supply part of the display switch is normal, the problem may appear on the connection line, but it may also be that there is a problem with the other circuits of the display, if the green light has not been lit, it proves that there is a problem with the power supply part of the display switch, if the green light has been flashing, it also proves that there is a problem inside the display (like the line tube is bad, the line output is bad).

If you can't hear a tick after the self-test, then remove the memory module to see if there is a memory alarm sound that has been ringing, if not, it proves that the motherboard self-test has not reached the memory module, and the fault may be: motherboard, CPU, BIOS, power supply and their corresponding connection problems; If there is a long beep, it proves that the CPU and power supply are good, and the problem may appear on the motherboard and graphics card; Now plug in the memory module, remove the graphics card, if you can hear a long and two short (graphics card alarm sound, according to the BIOS, the definition of the sound may be different), it can prove that there is no problem with the motherboard (generally this is judged, but there are special cases, such as a bad graphics card slot), the problem appears on the graphics card, and it should be okay to change the graphics card.

Finally, it is suggested that as long as the display is "black", power down the CMOS first, which can solve some incomprehensible faults.

It's not normal, the display has no signal, that is, there is a problem with the graphics card. Open the case, unplug the graphics card, sweep the card slot, plug in the graphics card, plug in the points, and tighten the screws. Try again. If not, it's warranted.

Find the root cause of the problem first,That is to say, we must first determine whether it is a problem with the host or a problem with the display,Finally, the problem of the link,The specific method is to find another good machine,Replace different parts to test separately。

Most of them are problems with the graphics card, remove the graphics card and wipe the gold finger with an eraser, and then install it will be fine.

Is it the monitor's light that keeps flashing? In addition, the light of the display is in a state that is generally green or blue if there is a signal. Do you want to make sure that the cable between the monitor and the host graphics card is connected properly?

Is the monitor power cord plugged in tightly? If it's normal, you have to power off and disassemble the host, and redial the graphics card and memory.

The computer is turned on but the display screen does not light up, these reasons will teach you how to solve it!