Common reasons why the computer screen does not light up when assembling a computer. When assembling a computer, it is a headache for the screen not to light up. PHP editor Banana will bring you relevant problems today to help you quickly locate the fault and solve the problem. This article will detail the common reasons you may encounter when assembling a computer and the screen will not light up, and provide corresponding troubleshooting steps. Please read on to get more information about this.
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.
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 if you try again?
When neither of the above two situations occurs, it means that the numlock key is broken.
It may be a power problem! It's very simple. Unplug everything plugged into the motherboard from the power supply first, 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 restart button (leave only the power-on cable), and then turn on the computer. If it cannot be turned on, it means that the connection between the indicator lights, the reset button, and the power-on button is wrong. !
1. Check the monitor and host connection cables
First make sure that the monitor’s power supply and adapter cable are properly connected to ensure that the monitor can operate normally and receive signals from the host. Make sure that it is not caused by The connection problem causes the display to become unresponsive;
2. Re-insert the memory module and graphics card
If the graphics card is inserted incorrectly or incompletely on the motherboard, it will cause the host to fail to operate normally and Send out a display signal, the same goes for the memory stick. Check the position of the graphics card and memory stick and re-plug it;
3. Clean the graphics card and memory stick
Use a small amount of alcohol to clean the graphics card and memory stick. Gold finger, so that the gold finger can be connected normally, and check the integrity of the gold finger to ensure that your graphics card and memory module can be used normally;
4. Clean the CPU fan
If Excessive dust on the CPU fan will cause serious heating, which may directly cause the computer to be unable to start. The fan must be removed, re-applied with silicone grease and reinstalled.
Reasons why the notebook screen does not light up when starting up: 1. Static electricity on the motherboard. 2. The graphics card is damaged. 3. Memory problem.
The Lenovo notebook keeps a black screen when it is turned on. You can follow the steps below to troubleshoot the cause:
1. First try the following operations: Remove the battery and power adapter, press and hold the switch button for 30 seconds to discharge the static electricity. light, wait for about 15 minutes, and then connect the power adapter separately to power on.
2. If it still cannot be turned on, it is due to the following reasons:
(1) The startup circuit of the notebook motherboard is faulty.
(2) The notebook screen cable is broken or has poor contact, resulting in no image signal being transmitted to the screen for display.
(3) The laptop's power adapter is damaged and cannot be powered on, or the laptop's battery is out of power, resulting in the inability to boot.
(4) The notebook's memory and graphics card are oxidized, causing poor contact with the memory slot or graphics card slot, resulting in the computer being unable to boot.
(5) The video memory of the notebook graphics card has a weak solder. Because the graphics card is broken, it will naturally not be able to boot.
1.
Check the memory, insert and remove the memory, and try multiple slots with one memory.
2.
If there is no problem with the memory, unplug the independent graphics card and use the integrated graphics card. If the integrated graphics can be used, it means there is no problem with the motherboard.
3.
If the first two steps are not solved, you can try to remove the motherboard battery, clear the cmos, and install it back in about ten seconds.
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. .
It may be that the graphics card fan is not spinning, causing the graphics card to not dissipate enough heat and the temperature is too high, so the graphics card fails and the screen goes black. Or the independent graphics card slot installed in the computer is not compatible, and the power supply of the graphics card cannot meet the output.
The reasons for the yellow light on the display are as follows:
1. When the computer is turned on normally, the yellow light on the display will change from yellow to green, indicating that the graphics card output is normal.
2. The reason for the yellow light on the computer monitor is as follows:
3. Check whether the data cable connecting the monitor to the graphics card is not in good contact. Pull it out and plug it back in, and then turn on the computer to see if it is normal.
4. Check whether the memory module is normal. Try plugging, unplugging, and replacing it. If the display can be resolved, it means the memory module is causing the problem.
5. This situation will also occur if there is a problem with the motherboard. Move the motherboard to another monitor and try to see if there is a display when you turn it on. If not, then you can conclude that there is a problem with the host hardware and the monitor. It is good.
6. When the computer enters sleep standby mode, turn off the monitor. Some ways to wake it up are just shaking the mouse, while others require pressing the power button.
7. If you have the conditions to use the computer's "test card", then plug the test card into the PCI slot and turn it on to see what is displayed. Then based on the displayed data, you can know which part of the hardware is broken. Causes and solutions: 1. The display cable is damaged, loose, or not connected properly. Replace the display cable or plug it in again to solve the problem. 2. If the computer case hardware failure causes the computer to not boot, replace the computer memory, graphics card, power supply, motherboard, etc. one by one, troubleshoot and then replace them. 3. The other problem is that the monitor is faulty. If you can find another monitor to replace it, you can basically determine where the problem lies. Replace it with a new one or send it for repair.
Black screen, the graphics card may be loose. Unplug the graphics card and use an eraser to clean the golden finger part before inserting it back. Make sure to insert it tightly.
The host keeps the red light on. It may be a hard disk problem, or it may be caused by you shutting down the machine illegally. Try pressing F8 to see if you can recover in safe mode.
The monitor is in standby mode. The corresponding solution is generally relatively simple and crude. You only need to press the power on button of the monitor. When the monitor logo appears, it means it has been successfully booted. On the contrary, if there is no response when pressing the power button, it is likely that the button is damaged, and you need to find an after-sales service or professional to repair it.
The monitor has no external input signal. Generally, this situation is caused by the signal cable not being inserted in place or becoming loose over time. The solution is also very simple. First check whether the signal cable is damaged, whether the monitor or host interface is damaged, and then plug it in or replace the signal cable.
Monitor hardware failure.
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