Does the computer not light up after power off? Does the computer motherboard not light up after being washed?

The computer cannot be turned on after a power outage or cannot be turned on after washing the motherboard. I believe many friends have encountered such malfunctions. When encountering this situation, don't panic, calmly analyze the cause and solve it patiently. Below, PHP editor Baicao brings you the solution to the problem that the computer cannot light up after a power outage or after washing the motherboard. I hope it will be helpful to you.

Can’t the computer light up after a power outage?

1.

When the computer screen does not light up, we can first use the method of releasing static electricity. You can unplug the power first, and then press and hold the computer power switch button with your hand. Press twice and see if the computer screen displays it.

2.

If the screen is black when the computer is turned on, you can check whether the computer keyboard light is on. If the keyboard light is on, it means that the computer is booting normally, but the computer monitor does not display. This is It may be because the VGA cable of the computer monitor is not plugged in properly or is loose. You can plug it in again and try. If there is no display, you can try another machine to see if there is a problem with the VGA cable.

3.

If the computer keyboard light does not respond when the computer is turned on, it means that the computer has not started normally. It may be caused by loose internal parts of the computer. At this time, you need to unplug the power supply first. , then open the case, take out the memory stick, then use an eraser to wipe off the dust on it, and then put it back in. After plugging it in, try turning it on again to see if the computer screen will light up. If not, you can replace the memory stick. Try again.

4.

If the screen does not light up when the computer is turned on, and if it is not a problem with the memory module, it may be caused by a loose graphics card. This can be done by removing the graphics card

Computer Why won't the motherboard light up after being washed?

If the top does not light up, it may be due to a short circuit of components. First check the power supply.

Assembling the computer power supply is not on?

It may be a power problem! It's very simple. Unplug everything that's plugged into the motherboard from the power supply. Then use a paper clip on the 20 4-pin end to connect the green wire to any black wire. If the power supply fan is spinning, then The power supply is good and can be ruled out.

After confirming that the power supply is good, connect the motherboard power supply and CPU power supply. If the independent graphics needs power supply, also connect it. However, if there is integrated graphics or nuclear graphics, it is recommended to unplug the independent graphics first (click When it lights up, it appears independently on top). Then unplug the hard drive indicator light, power indicator light, and reset button cable (leave only the power-on button), and then turn on the computer. If it cannot be turned on, it means that the connections between the indicator lights, the reset button, and the power-on button are wrong. !

Can’t the newly assembled computer light up?

There are many possible reasons. It is recommended to test with the smallest system. If there is a nuclear display, only use the motherboard, CPU, and memory to boot. See if the screen displays self-test information. If the light does not light up, use the substitution method to determine the fault point. .

Can’t the graphics card bios light up after editing?

The reason for the failure is that the independent graphics card failed and the integrated graphics card failed to switch successfully

Solution: We can still enter the desktop after waiting for a while. To solve it once and for all, we can make the following settings. First, the desktop is blank Right-click this computer - Properties

2. Enter the properties interface and click Device Manager

3. In the display adapter interface, you can see two graphics cards. We first right-click Integration Graphics card, check to see if the integrated graphics card is disabled. If it is disabled, click Enable Device 4. Then right-click the independent graphics card and select Disable Device

Does the light turn on after replacing the motherboard?

Thank you for the invitation. The light you are talking about is the hard disk indicator light, which represents the working status of the hard disk. If it is always on, it means that the read and write data is being transmitted. If it flashes, it means it is running. If it is off, it means that the hard disk is not working. Without further ado, based on years of experience, it basically falls into the following three situations.

First, the power supply is unstable. Due to poor quality or aging of the power supply, insufficient power is supplied to the system, resulting in frequent crashes.

Secondly, bad sectors inside the hard disk occur due to long-term use, resulting in frequent crashes.

Third, the crash caused by the unstable power supply of the motherboard caused by the aging of the motherboard.

Depending on your situation, the power supply is most likely to be broken, followed by the motherboard, and then the hard drive. Timely replacement of the old power supply is a necessary condition to maintain the normal operation of the system. Please pay attention to it! If there is a problem with the motherboard or hard disk, please replace it with a new one in time. The cost of replacing the motherboard of a machine five years ago is generally no more than 300, so please check and repair it in time. I am Pipi Longgui, a computer enthusiast who has always been interested in computer science. We will launch computer knowledge tips from time to time, welcome to pay attention!

Can the lights not turn on after connecting the HDMI cable?

Possible reasons why the image cannot be displayed after connecting to the TV with an HDMI cable:

1. The TV is switched to another signal source and the video signal output by the set-top box is inconsistent. Solution: Press the "Input Signal" button on the TV remote control and switch to the video source consistent with the set-top box.

2. The set-top box is not turned on, resulting in no image output from the TV. Solution: Just turn on the set-top box.

3. The backlight of the TV screen is broken or other special circumstances.

4. The screen driver circuit inside the TV has a fault caused by virtual soldering.

5. The circuit that controls the high-voltage board switch on the AD board in the TV is burned out. Solution: The above three points require professional technicians to disassemble, inspect and repair the TV. If the TV is still under warranty, send it to a TV brand repair shop for warranty.

Why does the assembled computer screen not light up?

If the computer screen does not light up, first consider whether the power cord is plugged in. If there is no problem with the cord or contact, then consider whether the interface fits properly.

The newly assembled computer keyboard light is on but the monitor is not on?

The power cord connected to the back of the monitor is loose and has poor contact.

The high-voltage board of the monitor has no output, so the monitor backlight tube does not light up, so it looks like a black screen.

The graphics card may have been burned, but in this case the computer will usually make a beeping sound when it is turned on.

The memory module may be loose. Remove the memory module, clean the slot and then insert it again.

It may also be that the motherboard battery is not discharged due to static electricity.

Why does num not light up when I turn on the computer I assembled?

There are three possibilities for the NUMLOCK light on the keyboard not lighting up:

It was on before, but you accidentally pressed it, and it turned off, which means you turned off numlock.

The indicator light is broken, but the numlock key still works. You can type a document and press the numlock key to see if you can enter the numbers on the small keyboard. If not, press numlock again. Can you input again by pressing the key again?

When neither of the above situations is true, it means that the numlock key is broken.

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