I just bought a test computer, why does the monitor say that there is no signal, and the display wil

The reasons why the monitor has no signal are generally as follows:

1.The system is broken, and you can't enter the system, but the boot BIOS information will be displayed on the display, such as: Lenovo's boot will display Lenovo letters. It is recommended to check the system, reinstall the system, or check if the memory is loose.

2.If nothing is displayed, the monitor's power cord may not be powered on (this problem is also more common, just replace the cable).

3.Nothing will be displayed after a flash of boot, which is generally the data cable of the display is not plugged in, the host PCI data cable socket of the machine of the independent graphics card generally has two ports, be sure to plug it into the socket on the independent graphics card, do not insert it into the socket of the motherboard, the socket of the independent graphics card is generally at the bottom of the machine, and the general color is blue. If it is a machine with an integrated graphics card, it can only be plugged into the socket on the motherboard.

If there is a similar problem with the machine of the integrated display, after excluding the 1 or 2 situations mentioned above, send it directly to the after-sales service (if you assemble the machine, send it to the place where you bought the machine) and let them test it, this situation is generally very serious.

Hello. If there is no signal on the display, either the signal cable is not in good contact, or the graphics card has no output.

Just check these two parts. Since it is newly bought, there should be no hardware problems.

If there is no signal on the monitor, the green line that is connected to the computer behind you is not plugged in, you are bad, you can screw the screws on both sides, as for what you said, it will light up when you press it, that is, the line contact is not good.

Generally speaking, the computer monitor you just bought shows no signal, or your connection cable is not plugged in properly, and now it is all independent display, do you plug the connection cable into the integrated display, because with the independent display, plugged in the integrated display, the display will not react! You try to put either when you take it back, the memory module is loose, so no hair to read the system This solution is very simple, take it apart, wipe the inner strip for a long time, OK, if this is not good, you have to see if it is a graphics card problem!

There are three possible reasons for your phenomenon. 1. It may be a problem with the graphics card that causes the system to shut down2. It may be that the CPU is overheated and causes the system to automatically power off and shut down protection3. It may be that the motherboard is faulty, causing the system to shut down.

You take a look at whether the line interface you connect to the monitor is connected, remove it and reconnect it, will the graphics card be loose, see if the fan of the graphics card is turned well, and then look at the strip Dismantle it and install it to see if the power supply of the display is plugged in well? If your monitor's power switch is tactile, you should hear a slight tap when you power up your monitor"Crackling"sound, at this time, it can be judged that the switching power supply circuit of the display is good. Is the power switch on the remonitor turned on?

Is the monitor's power indicator on? When approaching the monitor screen with your hand and slowly move it to see if there is"Sizzle"At the same time, the hairs on the hands have the feeling of being sucked up, which is checking whether the display high voltage circuit is working properly.

Take a look at whether the fan of the graphics card has been rotated, and then look at the strip and disassemble it from the installation to see.

See if the cable is connected to the graphics card!

The computer is on a black screen for a while, and the display shows no signal is a problem with the graphics card or the host, and the operation of the host fan does not mean that the host is working normally, and the keyboard indicator light is on just to indicate that the 5V power supply is powered:

A few seconds after the cold start of the computer, you must hear a 'tick' sound and pass the self-test!

There is no 'drip' sound, no self-test, there is a problem with the hardware: CPU, memory, power plug, etc. are in contact;

There is no sound on the host, and the keyboard does not respond to the sound because it is not started at all, and the keyboard light is lit by the electric wolf!

The fans are all normal, which only means that it has 12V power supply, and it can't explain anything else.

【The monitor is not responding】Has the English status been displayed? Describe how to determine the state of the hardware;

1[..There is no sound of checking. Must be heard"Drops"One sound, that is, it must be passed"Self-test! Otherwise, there is no other way to talk about it.

2[..I tried to disassemble the host to plug and remove the memory card, but it didn't solve the problem. Continue to check the CPU, gently take it down and then gently press on it.

3. Check whether the hardware of the power supply part of the motherboard is abnormal, especially whether the electrolytic capacitor has leakage, bulge, and discoloration.

This [just suddenly got better, but it didn't move when it was stuck on the boot screen, and the trip was late] belongs to the 'system' problem.,Maybe you have to reinstall the system;

Check whether the cable between the monitor and the main unit is loose.

If not, it may be a malfunction caused by poor hardware contact.

1. Turn off the power, open the case, clean up the dust, especially the dust of the CPU fan, and check whether the CPU fan is rotating normally.

2. Plug and unplug the memory, wipe the gold finger part with an eraser, and re-insert it (don't reverse it).

3. Plug and unplug the graphics card, wipe the gold finger part with an eraser, and reinsert it tightly (the buckle should be buckled).

4. 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.

There is no signal on the computer boot monitor, teach you 5 solutions.

1. I suspect that the connection of the monitor and the graphics card are not plugged in tightly, and it is still invalid after re-inserting and unplugging!

2. Then I suspect that the agp slot between the graphics card and the motherboard is not plugged tightly, and it is still invalid after re-insertion!

3. After that, I suspect that the graphics card is broken, and it is still useless after removing a good graphics card from a well-running computer and plugging it in!

4. At this time, it is suspected that the motherboard has been damaged, and after unplugging the memory, there is no alarm sound when the computer is turned on, which proves that the motherboard has been damaged (because there was a thunderstorm here a few days ago), and the problem is solved after replacing the motherboard!

Problem Analysis:

If the computer is powered on (the power indicator is on) but there is no signal or the screen shows "no sighal", it is generally due to poor contact due to loose or oxidized memory modules, or poor contact of the monitor data cable, or damage to the memory, graphics card, monitor or data cable.

Handling suggestions:1If the monitor is powered on but no signal is displayed, turn off (if the short press of the power switch is invalid, press and hold the switch until the power indicator goes out or directly unplug the power cord) Power off the case, replug and unplug the memory module, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), if possible, it can also be installed in different memory slots, and then turned on after installation (before operation, you should also touch the wall with both hands to release your static electricity or wear anti-static gloves). If you can't do it, then it's simpler:

Palm or kick the chassis once or twice (pay attention to the location: the front of the shell on the left and right sides of the chassis that does not have an interface at the back; Attention said: Don't push too hard, of course, don't be weak).

The above may need to be repeated, and if it doesn't work, you need to replace the memory module. If you have more than two memory modules, you need to test them one by one.

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. If it still doesn't work, consider that the cable or graphics card is damaged, then replace it with a new one.

3.If the monitor is not powered on (the indicator light is not on), check whether the power switch is turned on, then check the back of the monitor, plug the power cord connected to the monitor upwards (the power cord can be replaced if possible), and check whether the other end of the power cord is powered on to the outlet.

4.If the display can be displayed when connected to another monitor or the display of this machine is connected to another normal host and still cannot be displayed, it means that the monitor is damaged and needs professional repair.

Clean up your host memory module and graphics card.

Reseat the memory, erase the gold finger with an eraser and then install it to boot up