My computer turns on with a black screen, but the monitor s indicator light is flashing. The lights

The system power-on self-test initialization failed.

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).

I've tried, and mine is because some of the sockets are loose, especially for graphics cards, and you try to plug them in tightly, and they try again.

Analysis: There are two situations when the computer boots up screen: the screen is not powered on (the power indicator is not on) or the screen is powered on but there is no signal or "no sighal" is displayed, the former means that the power is not on or the connection is poor, and the latter is generally the memory module is not in contact or the graphics card is damaged. The keyboard light flashes and does not light up because the self-test failed to pass the power-on, and the so-called normal mouse is only because it is a UBS interface, and the light is on when it is powered on.

Recommendations:1If the monitor is powered on but no signal is displayed, turn off (if short pressing 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, plug in and unplug the memory module again, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), and then turn it on after installation.

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, then consider the graphics card 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 look at the back of the monitor, plug the power cord connected to the monitor upwards, and check whether the other end of the power cord is powered on to the socket.

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, the monitor is damaged and needs to be repaired.

Plug and unplug the graphics card, insert the memory tightly, no, press F8 when you boot up, safe mode, delete the graphics card driver, and then restart to automatically install the graphics card driver

Aren't you checking your hard drive?

Why is the monitor not lit?

After the liquid crystal display (LCD) screen is black, its indicator light is on normally (not flashing), indicating that the display has received the signal, then it means that there is no problem with the host, graphics card, signal cable, etc., and the fault is in the display itself;

At the moment of power-on, the monitor can be lit up for 1 3 seconds, generally in:

1. High-pressure plate.

Most of them are primary virtual welding of step-up transformers;

2. Backlight tube.

It may be that one of the lamps is damaged, or the pins of the lamps are corroded, or the wires of the lamps are broken;

3. (LCD) CPU is damaged;

Of the above three, Article 3 is unlikely;

It is recommended that the landlord focus on the investigation of the article;

For more information, please refer to the relevant section of my blog.

Hello, your situation is not.

The color of the display light is not abnormal or flashing.

The keyboard light doesn't light up, and the num lock doesn't light up.

When the host starts, it doesn't light up for a while.

Can't even get in?

Words like this. It could be a memory issue.

You unplug the memory and wipe it and install the graphics card as well.

It should be better after reinstalling.

Regardless of the display, it is sent to the motherboard or graphics card for testing

After the computer is turned on, press the upper and lower case letter keys to see if the keyboard uppercase and lowercase letter lights can turn on. If there is no response by uppercase and lowercase letters, it means that there is a problem with the host, and the host has no signal to the screen, resulting in a black screen. You need to check the host, the power supply and memory of the host are more broken, if there are these devices can be replaced.

If there is an on/off by uppercase and lowercase letters, that's a display issue. You need to take it to a professional repair center to check.

It is likely that the high-voltage strip or the IO chip that supplies power to the screen is broken, or it is also possible that the screen or cable is broken! The specific problem needs to be detected before you know, you can first connect an external display screen to see if it is displayed, if not, it is likely to be a problem with the high-voltage bar or IO chip, just change it (Note: The LED screen is the problem of the IO chip, and the LCD screen is the problem of the high-voltage bar!). ）

It's a memory issue:1Poor memory contact; 2.The memory is working too frequently; 3.The memory module is broken.

If you want to rule out the system problem, it should be a problem with the motherboard, go check it.

After confirming that the keyboard and mouse are connected normally, check the host, if you don't hear the sound when you boot up, it may be that the memory is not in good contact, take it apart and wipe it with a leather eraser, blow it clean and blow the slot at the same time. If that doesn't work, use the same method to get the graphics card.