1. Monitor problem: Power on the computer monitor separately and see if the monitor light can light up normally. If the monitor Please replace it in time if it is damaged. Cable problem: Check whether there is a problem with the connection cable between the computer and the monitor, and see if there are loose wires or poor contact.
2. When the computer starts up, the screen goes black. The power supply fan and CPU fan do not move, the indicator light on the motherboard does not light up, and the computer does not respond in any way. At this time, you should first check whether the power socket is powered on, whether the various power cables are good, and whether the connections are normal. If confirmed, please replace the power supply and try again.
3. Check whether the keyboard light is on, or press the Caps Lock button and see if the Caps Lock light is on. If it is on, it means the keyboard is normal and you can enter the system normally. Check the monitor and graphics card. and video output cable.
4. The computer memory is not plugged in tightly or the gold finger is oxidized and the computer memory module is loose, which will also cause the computer to fail to boot normally. Open the computer host, open the side panel of the case, pull out the memory module, and then perform the memory operation. Reinstall the memory slot. If that doesn't work, it is recommended to change the memory to another memory slot and then turn on the computer to test.
When the computer display does not light up and the keyboard does not light up but the host is turned on. You can first switch between upper and lower case on the keyboard. If the indicator light responds, it means the system is normal and the main problem is with the display. Then check whether the display cable is loose, and whether the memory module and graphics card in the computer are loose. If they are loose, just tighten them.
The monitor does not light up when the computer is turned on. The reason why the keyboard does not light up: According to the situation, it is mostly caused by poor contact between the memory or graphics card. Open the case, re-insert and unplug the memory module, and clean the graphics card. The gold finger is the metal on the card. After arranging the cables and turning on the computer, it can usually be restored.
Suggestion: If the monitor is powered on but shows no signal, turn off the power and open the case, re-insert and unplug the memory module, and use an eraser (you can also scrape the back of your thumbnail) to wipe the gold finger in one direction and install it. Then turn it on again.
Loose memory modules, poor contact, and dust accumulation will all cause the screen to not display. Solution: Unplug the power supply, remove the memory module, use an eraser to remove floating dust from the interface, and then wipe it clean with letter paper.
Solutions and steps to solve the problem of no signal on the computer display and the keyboard light is not on: First, check whether the computer has power. This may happen if the computer has no power. Check whether the host starts normally. If it does not start normally, check the hardware. The keyboard check will not affect the machine display.
The computer display does not light up because the display and keyboard lights are turned off, and the display and keyboard lights need to be turned on again. It may also be due to poor contact between the memory module or the graphics card. You need to re-insert and unplug the memory module and graphics card and clean the gold finger.
The monitor does not light up when the computer is turned on, and the keyboard does not respond. Reasons and countermeasures: The monitor plug is loose or the signal cable is damaged. Tighten the plug or replace the connection with a new one. The keyboard jack is loose or damaged. Plug in the plug tightly or try with a good keyboard. The gold finger of the memory stick is dirty. Shut down the computer, use an eraser strip to wipe the memory gold finger, and use a brush to clean the slot.
If the keyboard light does not respond, it may be that the memory is in poor contact and cannot enter the system; after the power is turned off, open the case or disassemble the bottom cover of the notebook, re-insert and unplug the memory module, and wipe the gold finger with an eraser in one direction. That is the metal contact part, wipe it clean and then put it back into the slot.
The computer display does not light up because the display and keyboard lights are turned off, and the display and keyboard lights need to be turned on again. It may also be due to poor contact between the memory module or the graphics card. You need to re-insert and unplug the memory module and graphics card and clean the gold finger.
After the host is turned on, the display screen, keyboard and mouse do not respond. There are three situations: the memory module is loose, the contact is not good, and dust is accumulated, which will cause the screen to not display. Solution: Unplug the power supply, remove the memory module, use an eraser to remove floating dust from the interface, and then wipe it clean with letter paper.
If there is no signal on the computer monitor and the keyboard light is not on, the computer motherboard may be faulty or the power supply may be faulty. Computer motherboard failure: When a computer motherboard fails, the computer's monitor and keyboard will not work.
It may be that the running memory is loose or the gold finger is oxidized. It may also be that the monitor's cable is plugged into the motherboard's interface, causing the monitor to have no signal input after the computer starts normally. It may also be caused by the monitor power cord being loose or damaged.
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