The most anxious moment when assembling a computer is pressing the power button but it doesn’t light up. Regarding the problem that the newly assembled computer cannot light up, PHP editor Xiaoxin will provide you with an in-depth analysis of the possible causes and provide a series of troubleshooting and solutions. If you are troubled by the problem of your computer not turning on, please continue reading this article and we will work together to solve this problem and bring your computer back to life.
There are many possible reasons. It is recommended to test with the smallest system. If there is a core 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. .
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. !
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. You can press it 2 more times. Take a look. Whether the computer screen will display.
2. If the screen is black when the computer is turned on, you can check whether the computer keyboard indicator light is on. If the keyboard light is on, it means that the computer is turned on normally, but the computer monitor does not display. This may be because of the computer monitor. The VGA cable 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 first, then open the case, and Remove the memory stick, then use an eraser to wipe off the dust on it, and then put it back again. 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 and 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. You can remove the graphics card, clear the dust inside the graphics card slot, and then Put it back and try again. If the graphics card is broken, you need to replace it with a new one.
The screen does not light up when the computer is turned on, because the computer's display screen is not connected to the power supply
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 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.
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. You can press it 2 more times. Take a look. Whether the computer screen will display.
2. If the screen is black when the computer is turned on, you can check whether the computer keyboard indicator light is on. If the keyboard light is on, it means that the computer is turned on normally, but the computer monitor does not display. This may be because of the computer monitor. The VGA cable 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 first, then open the case, and Remove the memory stick, then use an eraser to wipe off the dust on it, and then put it back again. 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 and 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. You can remove the graphics card, clear the dust inside the graphics card slot, and then Put it back and try again. If the graphics card is broken, you need to replace it with a new one.
5. If your computer screen does not light up, and there is still no response after trying the above methods, it may be a motherboard problem. At this time, we need to unplug the power, then remove the motherboard battery and put the CMOS jumper , jump to the "colse" position, and then after 5 minutes, put the battery back, return the jumper to its original position, and finally try turning it on again to see if the display lights up.
6. If you have tried all the above methods on your computer and the computer monitor screen still does not light up, you should take the computer to a professional computer repair shop for inspection, especially for laptops, which are more difficult to disassemble. , it is best to send it to a repair shop for repair as soon as possible.
Replace it with the old one and see if it lights up. If it lights up, the new CPU is broken or not plugged in properly. If it doesn't light up, check if the memory, etc. is not moving, and plug it in again. Check the memory.
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.
The red light on the computer motherboard cpu
1. The CPU or memory has poor contact. Check to see if reinstalling or replacing the CPU and memory can resolve the fault.
2. The working frequency of memory, PCI-E or PCI does not match the FSB, and a fault occurs. Generally, a CMOS discharge is performed to restore the CMOS to its default settings. Turn on the phone and try again.
3. The most common fault is poor contact of the memory module. Pull out the memory module, sweep the memory slot with a brush, and try plugging and unplugging it several times.
The above is the detailed content of Does your newly assembled computer not light up? Doesn't the power supply light up when assembling a computer?. For more information, please follow other related articles on the PHP Chinese website!
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