The computer is turned on, but the monitor has no screen and no response

You don't need to remember the boot sound, and you can't remember it, different motherboards, the sound is different.

If it's turned on, it doesn't respond, and the screen is black.

The black screen cannot be turned on, which is generally due to poor contact of memory or graphics card or memory quality or power supply problems or poor CPU contact (no sound or beep sound when booting up, more than two sounds are problematic, and a short tick is normal).

Generally to reseat the graphics card and memory card, the main thing is to clean the dust near the CPU and memory, which is easiest to do - or replace the memory or graphics card or power supply.

The capacitor on the motherboard may be bursting, see if the capacitor near your computer's CPU (the capacitor erected like a keg) is bulging, the normal should be flat, buy a few of the same model in the electronic market, and change it for a few cents.

There is a possibility that the graphics card or CPU is too hot, check the fan.

If none of the above is the problem, it's a problem with the display.

How to troubleshoot the black screen and no display fault when the computer is turned on (the most likely is the motherboard problem, first carefully check whether the motherboard has a bulging capacitor).

Step 1: First of all, check whether the external wiring of the computer is connected, and plug in each cable again to see if the fault is eliminated.

Step 2: If the fault persists, then open the main chassis to check whether there is any excess metal in the chassis, or a short circuit caused by the deformation of the motherboard, and smell whether there is a burning paste in the chassis, whether there are burned chips on the motherboard, and whether the capacitors around the CPU are damaged.

Step 3: If not, then clean the dust off the motherboard and check if the computer is in good condition.

Step 4: If the fault persists, unplug the reset cable on the motherboard and connect it with other switches and indicator lights, and then use the change cone short-circuit switch to see if it can turn on.

Step 5: If you can't turn on the computer, then use the minimum system method, unplug the data cable of the hard disk, floppy drive, and optical drive, and then check whether the computer can be turned on. Then connect the above devices to the computer one by one, when connecting a certain device, the fault will recur, indicating that the fault is caused by this device, and finally focus on checking this device.

Step 6: If the fault persists, the fault may be caused by devices such as memory, graphics card, CPU, motherboard, etc. Then, use the plug-and-unplug method, the swap method and other methods to check the memory, graphics card, CPU and other devices respectively.

Method 1: Detailed explanation of the principle:

1.If there's a problem with the monitor, it's broken.

2.There is a problem with the cable connecting the monitor and computer.

3.Memory module problem, memory module bad contact.

4.Motherboard electrostatic reaction.

5.There is a problem with the motherboard.

End Monitor Problems and Solutions:

If it's broken, you can try to change the monitor.

END cable problems and solutions:

Just update the cable.

End memory module problems and solutions:

<>End motherboard electrostatic reaction solution:

End motherboard problems and solutions:

For the problems of the motherboard, professionals need to test it, and do not disassemble it without permission, otherwise you will bear the consequences.

Method 2: In this case, check whether the connection between the computer and the host is normal.

If there is no problem with the cable, there may be a problem with the computer's host hardware.

Let's turn off the host first, and remember to power off the power supply for the safety of the individual and the computer.

Unplug all the cables behind the main unit in turn, and some plugs need to loosen the screws of the plug to unplug them.

Using a Phillips screwdriver, remove the screws on the back of the main unit. After pushing the cover of the main unit, the panel of the main unit can be removed.

When you turn on the console, you can see the motherboard and other components. Usually, the display screen is black, and this fault is caused by poor contact of the memory module.

Pull both sides of the memory module outward with both hands at the same time, and the memory module can be easily removed.

Use a small, clean brush to clean the memory module socket. Then use a drawing eraser to gently wipe the golden part of the interface of the inner finger to change the bridge, and remember to wipe the front and back.

Attach the memory modules back to the motherboard in turn, cover the main chassis panel, tighten the main chassis screws, and plug all the cables back into the corresponding ports. In this way, you can turn on the power and try it, and usually the computer can be turned on normally.

1. Check the connection between the monitor and the host to see if there is a loose problem, if the line is intact, then it needs to be disassembled.

2. Before disassembling the machine, we need to cut off the power supply, then use a screwdriver to remove all the screws, clean the memory module, and then install it.

3. Check the cable between the motherboard and the VGA again, check if there is any looseness, we can plug in the plug with our hands, and then start the computer.