The computer boot display does not light up, the keyboard light does not light up, and it can only b

Occasional system issues. It may also be caused by a data error caused by the last illegal shutdown.

Or your computer electronics are gone.

Or your computer is gray and heavy.

Relatively deal with it and be hungry.

If there is a problem with the motherboard or power supply, try loadbios after power-off and plugging and connecting, but it will not work for a repair station to detect.

It's not like this every time, if it's like this every time, it's a problem with your hardware settings, if it's once in a while, it's a memory problem!

This is a power supply problem, because the voltage is not enough, so it must be restarted twice to turn on, it is recommended to replace the power supply.

I also had this problem with my computer, but it ran out of battery, I suggest you connect the charger and try again, if it still doesn't work, it is recommended to go to a computer store to see.

Hello, unplug the memory module graphics card, use the eraser to erase the gold finger, and then put the graphics card memory module back, if it is multiple memory sticks, it is recommended to plug in one and try to boot it, and it is recommended to change the memory card slot position to try! Hope this time it helps!

If you have used it very normally before, and you have not made any special mistakes, it is usually infected with a virus, which requires a professional to help you, or reinstall the system yourself.

After the computer is forced to shut down, the monitor has no signal, and the keyboard light does not light up, which should be a hardware problem.

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; If it is on, listen for the boot prompt.

3. If there is, check the graphics card, display and signal cable, as well as the motherboard; If not, check the CPU, memory, and motherboard.

If this happens occasionally, there should be no big problem and you can continue to use it without treatment.

Is there no problem after the second boot, this day even if you turn it on and off, it's fine, if that's the case, then it is recommended that you check the CPU first, because you have encountered similar problems, and finally it is solved by replacing different models of CPUs, so, it is recommended that you can also think about it in this way.

Considering the system problem, it is recommended to reinstall the new system to try.

Measure the motherboard battery to see if the battery is fed.

Summary. Hello dear, this should be the capacitance aging on the computer motherboard or the power supply ** problem. When the power supply voltage is unstable due to the aging of the capacitor, the computer is turned on after a period of power failure, and the display and keyboard light may not light up.

After a period of time, the keyboard light will turn on again, and the capacitor voltage will gradually recover. In addition, the power supply problem can also lead to a similar situation, you need to check whether the power supply voltage is stable and whether the power supply needs to be replaced. Graphics card issues generally don't cause this.

The computer is turned off, and the computer monitor does not light up and the keyboard light does not light up overnight, and the keyboard light will be lit in a few minutes, and then the keyboard light will be turned on, and then the computer will be turned on normally, which is a problem with the motherboard or the graphics card

Hello dear, this should be the capacitor aging or power supply problem on the motherboard of the noisy Zheng computer. When the power supply voltage is unstable due to the aging of the capacitor, the computer is turned on after a period of power failure, and the display and keyboard light may not light up. After a period of time, the keyboard light will turn on again, and the capacitor voltage will gradually recover.

In addition, the power supply problem will also lead to a similar situation, you need to check whether the power supply ** voltage is stable, and whether the power supply needs to be replaced. Graphics card Xunyan issues generally don't cause this to happen.

The capacitors of the motherboard will generally deteriorate.

Dear, the following types of capacitors on the motherboard may be more susceptible to aging:1Solid State Capacitors:

The life of solid-state capacitors is relatively long, but long-term use will lead to reduced capacitance loss, increased temperature, and even **. 2.Electrolytic Capacitors:

Electrolytic capacitors are the most susceptible to aging, and long-term use will lead to a decrease in capacitance value and leakage. 3.General-purpose capacitors:

General-purpose capacitors are relatively low capacitors compared to Shanliang, but they are prone to leakage and have a relatively short service life. Because of this, when purchasing a motherboard, it is recommended to choose a motherboard with a good brand and the highest capacitance, and at the same time regularly check whether the motherboard capacitor is aging, and repair or replace the capacitor to ensure the stability and reliability of the motherboard.

Discharge the BIOS battery (restore the BIOS factory defaults) It is recommended to plug and unplug the graphics card and memory, clean it up, and polish the gold finger of the graphics card and memory.

How to troubleshoot the failure of the computer without display when it is turned on (check whether there is 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-in method, swap method and other methods to check whether the memory, graphics card, CPU and other devices are normal, and replace the damaged devices if there are damaged devices.

Step 7: If the memory, graphics card, CPU and other devices are normal, then discharge the BIOS, use the isolation method, place the motherboard outside the chassis, connect the memory, graphics card, CPU, etc. for testing, if the computer can be displayed, then install the motherboard into the chassis for testing until the cause of the fault is found. If the fault persists, you need to return the motherboard to the manufacturer for repair.

Step 8: When the computer is turned on without display but there is an alarm sound, when the computer is booted up, the system BIOS starts to POST (power-on self-test), when it detects a fatal error in a device in the computer, it will control the speaker to send out a sound to report the error. Therefore, there may be a fault that the power is turned on without displaying an alarm sound.

If the computer is turned on and there is no alarm sound, the fault can be checked according to the meaning of the BIOS alarm sound to check the faulty device to eliminate the fault.

This kind of problem is most likely due to a problem with your power supply, and sometimes there may be a problem with the power switch.

The first case:

When pressing the power supply, pay attention to it, if the fan behind the case does not turn, it may be a problem with the power supply, or there may be a problem with the switch to turn on.

The second situation: press the power switch, the fan behind the chassis rotates, but it stops after a few seconds, this is your power switch is broken, the switch can not be separated after pressing, and the system will automatically shut down after more than 4 seconds.

The third case:

After pressing the power switch, the fan is turning, and there is no "di" prompt sound in the chassis, or there is a sound, but it is not displayed, please disassemble the chassis according to the statement on the first floor, sweep the dust, and wipe the version card. Then put it on the machine.

See if the capacitor next to the CPU on the motherboard is bursting......

Disassemble the main chassis by yourself, unplug the memory card and graphics card, wipe it clean and try again. I didn't open it before, so I did it.