The computer screen is black, there is no boot screen, but the display light is on

Phenomenon analysis: Poor contact between hardware, or hardware failure, related hardware involves memory, graphics card, CPU, motherboard, power supply, etc. The boot of the computer must first be powered by the power supply, then guided by the motherboard's BIOS self-test, and then through the CPU, memory, graphics card, etc.

This process is reflected on the screen called self-test, first through the graphics card BIOS information, then the motherboard information, then the memory, hard disk, optical drive, etc. If something goes wrong with any of these steps, the computer won't boot up properly, or even go black.

What to do: First, make sure that the external and internal connections are connected smoothly. The external connection has a monitor, a host power supply, etc.

There is a cable between the host power supply and the host power connector inside (sometimes the contact here is not good). The more common reasons are: graphics card, memory due to long use, long-term contact with dust in the air, resulting in the oxide layer on the gold finger, resulting in poor contact.

In this regard, rub the gold finger back and forth with a moderate amount of alcohol glued to cotton, and insert it back after drying. In addition, observe whether the CPU is working normally, turn on for about half a minute, and touch the heat sink of the CPU fan with your hand to see if there is a temperature. If there is a temperature, the possibility of CPU failure can be basically ruled out.

If there is no temperature, tidy up the socket of the CPU to make sure the contact is in place. After that, before the temperature, your CPU can be upgraded (in addition to the above method, there is also a nirvana: use the jumper method to clear the BIOS settings or replace the CMOS battery of the motherboard.

When all of these methods have been tried and failed, you can summon a master to help you).

It is preliminarily concluded that the graphics card is hanging, or the cable is broken.

Laptop black screen bai

The power indicator is on, but the screen does not display the reason and how to deal with the DAO as follows:

The first internal reason: due to the poor contact of the memory slot or the graphics card slot, the sudden black screen is caused by the inability to turn on, and the probability of it appearing black screen accounts for 60%, treatment method:

It is to remove the power supply, open the back cover of the notebook, take out the card slot of the memory, if it is not a separate graphics card soldered to the motherboard, also take out the card slot, align the part of the memory and the gold finger of the graphics card (that is, where there is a copper sheet) and rub it back and forth with an eraser, wait for the copper sheet to shine, and then blow the ash and then insert it back, cover the back cover, and the boot is generally OK.

The second reason: is that the video memory of the notebook graphics card is soldered, the performance of the main chip is reduced, the graphics card BIOS is disordered, and the control power supply IC is problematic, which will cause the graphics card to fail to work normally, that is, the graphics card is broken, because the graphics card is broken, the screen will suddenly go black, and the treatment method is to repair the graphics card, or replace the graphics card.

Chapter 109: Hou Fang's soul five sons admit their wrong love, repay their debts and welcome their daughters back to the true yuan.

Summary. Hello, dear, the black screen of the computer boot does not show anything, but the indicator light is on what's going on. This belongs to the computer black screen, and the computer black screen is caused by many reasons, and the common ones are the following:

1. Poor contact of hardware, generally mainly poor contact of memory modules. You need to unplug the memory, erase the gold finger with an eraser, and then reinstall it. 2. If the chassis is caused by static electricity, you need to unplug the power supply and press the power button several times.

The black screen of the computer boot does not show anything, but the indicator light is on what's going on.

Hello, dear, the black screen of the computer boot does not show anything, but the indicator light is on what's going on. This belongs to the computer black screen, the computer black screen is caused by many reasons, the common reasons are as follows: 1. Poor contact of hardware, generally mainly poor contact of memory sticks.

You need to unplug the memory, erase the gold finger with an eraser, and then reinstall it. 2. If the chassis is caused by static electricity, you need to unplug the power supply and press the power button several times. 3. Other hardware failures, such as motherboard or graphics card failures, need to be repaired.

But the computer's fan can still spin.

I press fn plus space to make the keyboard glow.

Hello, dear, it may be that the memory slot socket is in poor contact, after the power is off, disassemble the back cover, and use an eraser to wipe the metal contact part can solve it; It may be that the graphics card or motherboard circuit is faulty, and it is recommended to go to the after-sales service for repair and replacement; Still. Due to the poor contact of the memory slot slot, the screen suddenly goes black, and the machine cannot be turned on. Unplug the power supply of the notebook first, and if it is designed to remove the battery, you can remove the battery first.

Open the back cover of the notebook and remove the memory. That is, the graphics card cannot work normally due to the virtual soldering of the video memory of the notebook graphics card, and the only way to replace the parts in this case is to the after-sales repair shop; If the boot circuit of the notebook motherboard fails, such as clock, reset, power supply, MOS tube, etc., it may cause a sudden black screen, I o has a problem, and the computer cannot be started, black screen, etc., ,..That is, the screen line of the notebook is broken or the contact is poor, resulting in no image signal being transmitted to the screen for display; Try to connect the output port of the notebook with a cable to check if it can output

There are several reasons why the black screen of the display screen collapses1、The computer host is operating normally,And the display screen is black,At this time, first see if the power indicator light of your display shirt attack screen is on,If the light is off, it may be that the power plug of your monitor is loose,Try to plug the plug again; 2. If the host is working normally, the power indicator of the monitor is on, but the monitor screen is black, it may be that the transmission line connecting the computer monitor and the computer host is loose or broken. 3. If it is not the black screen caused by the loose power cord or data transmission line, it may be that the graphics card of the computer host is loose, which needs to open the computer chassis, to open the chassis, you must first have a screw knife and other tools, remove the graphics card, wipe the ash on it, and then install it;