What should I do if the monitor has no signal and the keyboard is out of power when the computer is

There are many problems with the computer booting up, there may be graphics card, memory graphics card, and it may be a hard disk, as well as dust, in the absence of any instruments and tools, it is impossible to know at once that it is a problem that can only be eliminated. First of all, you observe whether the motherboard light is on, if it is on, it means that your motherboard is powered on, and then see if the CPU fan, graphics card fan, and power supply fan are turning, if the above are running, but the display is not on, we can follow the steps to exclude. First, check whether the connection cable between the computer and the monitor is loose or broken, I once encountered a buddy connection cable that was bitten by a mouse, and I didn't find the reason for looking for a long time.

Second, open the main cover, don't forget to put static electricity before opening the cover, see if there is any abnormality or smell in the motherboard, graphics card, and power supply, and check whether the memory module, graphics card, hard disk cable, and CPU heatsink are loose. Third, unplug the graphics card, find a clean cloth and an eraser for the memory module, a little alcohol, use the eraser to oxidize the gold finger of the graphics card and the memory module into an eraser, pay attention to the strength, and then wipe it with a cloth with alcohol and put it aside. Fourth, remove the excess dust on the chassis, motherboard, and CPU heatsink, and the memory module and graphics card motherboard slots.

Fifth, clean up the dust of the CPU cooling fan, if there is a condition, it is recommended to replace the CPU silicone, but you must be careful when disassembling the CPU fan, you can't pull it out, Intel's original rotating buckle is gently pulled up, and other heat sinks refer to the manual; Complete the appeal steps, install all the accessories, check if the installation is in place, and then attach the main unit cover to boot the test. Generally speaking, there is a high probability of being out of the memory module, so you can focus on checking the memory module first. After completing the above steps, it can't be solved, you can only consider the hardware problem, and this can only go to the after-sales or repair shop.

Hello, I have seen your question, and I am sorting out the answer, please wait for a while The computer boot monitor does not respond, and the mouse and keyboard do not light up, there are the following situations: dear, you can check it yourself: 1. The computer memory is loose or the gold finger oxidation memory is loose will also cause the computer to fail to start normally, this probability is high, it is recommended to try first.

Open the side panel of the chassis and unplug the memory module, then reinstall the memory into the memory slot. If that doesn't work, it's recommended to replace the memory with a different memory slot and try it when you try to boot. If you have multiple pieces of memory, you may wish to alternate and unplug them first.

It is not ruled out that one of the memory modules is damaged, or one of the memory is loose. 2.Motherboard Button Battery Discharging The discharge of a button battery is very simple, there is a button battery on the motherboard.

Pry the button battery open by hand or with a screwdriver, and the button battery will automatically pop out. At this time, we can take it out directly with our hands, put the button battery for 10 seconds, and then reinstall it in place and turn it on to test it. If the computer does not respond when it is turned on, there is no signal, but the keyboard and mouse indicators are on, we press the "numlock" key in the keyboard area of the keyboard panel, press the indicator light once and it will turn off, and then press the indicator light to turn on, indicating that the host is operating normally.

In this case, it may be that the connection line between the monitor and the host is wrong3, and the connection between the monitor and the host ** line is wrong, and the wrong display connection line is a problem that users often encounter. Generally speaking, such hosts have a discrete graphics card installed, and many users plug the monitor's cable into the monitor connector on the motherboard. This is the wrong connection method, resulting in a black screen with no signal input after the computer boots up normally.

This interface is only plugged into by users of integrated graphics cards, and it is not excluded that the display screen is black due to loose cables, loose power supplies or damaged cables. If not, it may be that the graphics card is loose, or the gold finger of the graphics card is oxidized, pull out the graphics card and wipe the gold finger with an eraser, and then reinstall it under the test, it is not ruled out that the graphics card is damaged or the ** line is damaged.

Questions. What's going on with the mouse and keyboard not lighting up.

I have checked all the situations I told you above, and if it doesn't work, you will have to take it for maintenance.

The most likely failures are hard drives, graphics cards, and memory.

Questions. Good.

1. It may be that there is too much dust accumulation in the host, resulting in poor contact and causing crash failure, check the CPU and graphics card heat dissipation, and then remove dust, oil, or replace the fan.

2. If the host is turned on normally, but the screen is not displayed, it is likely that the cable connecting to the screen is loose, as long as you find the cable connecting to the screen and plug it in.

3. If you confirm that the cables have been plugged in, but the screen and keyboard light are still not on, it may be caused by poor memory contact, and try to reseat the memory module.

4. If it still doesn't work after re-inserting the memory module, it may be that there is a problem with the graphics card, if the independent graphics card you use can be inserted to try the display, or it is invalid, you can only send the computer for repair, it is likely that the hardware is damaged.

Answer the problem that the computer memory module is loose and will cause the computer to not boot normally, this probability is high, it is recommended to try it first. We turn on the host computer, open the side panel of the chassis and pull out the memory module, and then reinstall the memory into the memory slot, if not, it is recommended to replace the memory into other memory slots, and then try to boot it to test. If you have friends with multiple memory, you might as well insert one memory first, and the other memory will not be inserted first, try to boot the test, if not, change to another memory insertion, and this memory is not inserted, alternate testing, it is not excluded that one memory is damaged, or one of the memory is loose.

Question: This is a new computer.

Haven't been playing for a few months.

If the computer boots up and the monitor does not have a signal, and the keyboard light does not light up, it should be a hardware failure.

Solution: 1. When turning on the machine, see if the power indicator of the host is on.

2. If it doesn't light up, check the power supply.

3. If it is on, listen to the boot prompt.

4. If there is, check the graphics card, monitor and signal cable, as well as the motherboard.

5. If not, check the CPU, memory, and motherboard.

If it is 5, you can plug and unplug first, clean up the memory and CPU, discharge the motherboard, and restart it in two ways. Eliminate the possibility of false connections.

If you encounter such a problem, please try to solve it by following these steps:

1.Unplug the power button and restart button connected to the chassis on the motherboard, and try using the metal short power button. (The power button and restart button are short-circuited or damaged, which will cause this kind of situation) has a 20% probability of occurring, if not, proceed to the next step.

2.Take out the memory, clean the golden contact piece and the memory slot on the memory module, and then insert the memory (this kind of failure will occur due to poor memory contact), the probability of occurrence is 50%.

3.Replace the power supply, the power supply is poor or the power supply line is short-circuited, this fault will also occur, the probability of the way is 10%. If not, proceed to the next step.

4.Disconnect the power and data cables of the hard disk, in the past maintenance experience, the short circuit of the hard disk circuit board will also cause such failures, and the probability of occurrence is < 10%. If not, proceed to the next step.

5.When replacing the motherboard, the south bridge chip of the motherboard is damaged or soldered, which is easy to cause such failures, with a probability of 10%.

Answer 2, the computer monitor has no signal is more common because the computer memory module is loose or too much dust caused by no signal, in this case, you need to dust the computer memory module, wipe the gold finger of the memory module with a paper towel, and then install it back to check whether the computer monitor has a signal.

3. If you use a discrete graphics card. It is also possible that the above situation may occur, and at this time, you also need to reinstall the graphics card to solve the problem of no signal on the computer. If there is no display on the computer but there is an alarm sound, you need to check the faulty device according to the BIOS alarm sound.

Troubleshooting: The fault of the computer monitor is divided into soft fault and hard fault, when the display can not be displayed normally, you should first briefly analyze it, the fault is in the **, is the software setting problem or the internal circuit of the display is broken, and then determine whether it needs to be repaired, so that you can run less unjust road. According to the fault classification of the display, there are the following fault phenomena:

The hardware with a black screen causes are: power supply, memory, graphics card, motherboard, CPU.

Other packages have data cables connected to the display, VGA interfaces, crooked needles, motherboard capacitors, and broken memory damage, gold fingers are oxidized, slots are dusty, dirty, graphics card is damaged, gold fingers are oxidized, slots are dusty, dirty graphics card slots are damaged, and graphics card memory is burned out.

The main reasons are software problems, hardware problems, heat dissipation problems, motherboard problems, and environmental problems.