Hello, my computer can t come, the display screen was still on two days ago, and it didn t light up

Problem analysis: There are two situations when the computer boots up and the display does not light up: the display is not powered on (the power indicator is not on) or the display is powered on (the power indicator light is on) but there is no signal or the screen shows "no sighal", the former means that the circuit is not working, or the power interface or power cable is in poor contact or damaged, and the latter is generally a poor contact due to loose or oxidized memory modules, or poor contact with the display data cable, or damage to the memory, graphics card, display or data cable.

Handling suggestions:1If the monitor is powered on but no signal is displayed, turn off (if the short press of the power switch is invalid, press and hold the switch until the power indicator goes out or directly unplug the power cord) Power off the case, replug and unplug the memory module, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), if possible, it can also be installed in different memory slots, and then turned on after installation (before operation, you should also touch the wall with both hands to release your static electricity or wear anti-static gloves).

If you don't know how to operate, then it's simple: slap or kick the chassis once or twice (pay attention to the location: the front of the shell on the left and right sides of the chassis that has no interface at the back; Attention Tract:

Don't push too hard, and certainly don't be weak). The above may need to be repeated, and if it doesn't work, you need to replace the memory module. If you have more than two memory modules, you need to test them one by one.

2.If the above operations do not work, turn off the power and turn on the chassis, reinsert the graphics card, and plug in the data cable between the monitor and the graphics card. If it still doesn't work, consider that the cable or graphics card is damaged, then replace it with a new one.

3.If the monitor is not powered on (the indicator light is not on), check whether the power switch is turned on, then check the back of the monitor, plug the power cord connected to the monitor upwards (the power cord can be replaced if possible), and check whether the other end of the power cord is powered on to the outlet.

4.If the display can be displayed when connected to another monitor or the display of this machine is connected to another normal host and still cannot be displayed, it means that the monitor is damaged and needs professional repair.

If the display screen and keyboard are not lit, there can be a normal state energy is not stupid and the host is not stupid to be powered on, and in the case of Xinsun, it is also necessary to replace the accessories to detect it, and the power supply, memory, and motherboard will be more likely.

The computer boots up, the mouse and keyboard monitor are not lit, which means that the computer cannot be started at all, and it can be basically determined that the power supply, Niantong CPU or motherboard is faulty. Normally, the motherboard and power supply are more likely to be damaged, if you do not have a replaceable motherboard or power supply in hand, it is recommended to go to the store for inspection and repair, and replace the damaged parts.

If the computer is turned on and the screen is not lit, it may be caused by the host not being powered on, and it is also necessary to replace the accessories to detect it, and the problem of the power supply motherboard is relatively large.

First of all, the power supply, after the power failure, the computer does not have a power supply, naturally all the lights are not on, the host does not have any response, the power supply can be replaced, followed by the motherboard, the motherboard appears so that the line is not passable, causing the computer to not start, replace the motherboard.

If the keyboard light does not light up, it means that there is a problem with the memory, CPU, motherboard, or power supply.

Solution: 1. If the keyboard light does not light up, first wipe the memory module with an eraser, and check whether the gold finger of the memory module has any burnt marks. Replace the memory in the slot.

2. Check the capacitors and resistors on the motherboard to see if the capacitors are bulging, whether there is a burning smell on the motherboard, and clean up the dust on the motherboard.

3. Remove the CPU fan, power on and turn on, test whether the CPU has a temperature change by hand, if not, the CPU is not working, either the motherboard is broken, or the CPU is not plugged in properly, and the CPU is re-plugged.

4. Power supply problem, although the power supply is powered on, but the motherboard can not work normally, replace the power supply and try it.

5. If the display card is loose or oxidized, the keyboard light will be on, the screen will not be displayed, wipe the gold finger of the graphics card with an eraser, and check whether the capacitance on the graphics card is bulging.

6. Minimize the test method, only leave the power supply, motherboard, CPU, memory, graphics card, keyboard, monitor, unplug all the wires on the rest of the motherboard, use a screw knife to short the switch pins, if normal, add the rest of the hardware, piece by piece, until the cause of the problem is found.

In this case, the computer display does not light up but the host computer is turned on and the keyboard is on, which may be caused by the following reasons:

1.Display failure: It may be that there is a fault in the display itself, such as a power issue, a connection issue, or another hardware failure that prevents the image from being displayed properly.

Solution: Try checking that the power cord of the monitor is plugged in properly to make sure that the connection line is normal. If the problem persists, you need to contact a professional computer repairer for further diagnosis and repair.

2.Graphics card problem: It may be that your computer's graphics card is faulty, which prevents the output signal to the monitor to be normal.

Workaround: You can try to reseat the graphics card and make sure it's connected properly. If the problem persists, you may need to replace or repair your graphics card.

4.BIOS Setup Issues: Sometimes, your computer's BIOS settings can cause the display to fail to light up.

Workaround: Try to enter the BIOS interface of your computer (usually press DEL, F2, F10 or other keys to enter), check if the monitor settings are correct, and try to restore the default settings.

If the above methods do not solve the problem, it is recommended to contact the manufacturer of the computer or a professional computer repairer for further examination and repair.

Is the monitor power cable and signal cable secure when plugged in? If it's strong, you're in trouble. After restarting, the screen will be black for a while, and it is a problem with the graphics card part of the host that it is not good. It's best to change the monitor and see if there is the same problem.

1 The screen saver is activated, you can set it for a longer time to try it.

2 The graphics card is faulty, or the graphics card is hot.

It may be that the graphics card driver is faulty.

The monitor is broken, you can fix it, 30 yuan to get it.

It may have something to do with the memory module.

Try unplugging it and rubbing it.

Problems with the graphics card, or poisoning.