After the computer boots up and the self test is completed, a screen flashes, white characters and b

There may be a system issue. You try to turn the hard disk on without powering on to see if this phenomenon is detected. If the problem persists, your hardware is faulty. If it's good, it's bad with your system!!

Additional note: You just added that the problem shows that your hardware is good, that is, there is something wrong with the system. You say that you can enter safe mode, you can go to the start menu in safe mode and run msconfig--start to remove the option that does not need to be started.

Then reboot and see!!

Also, turn down your resolution a little bit in the display settings.

I can pass the self-test and say that there is nothing wrong with the obvious card.

Check it out in Safe Mode! Uninstall the graphics card first!

First determine whether the graphics card is normal, followed by the system!

If the safe mode is fine, the hardware is fine, could it be that you accidentally lost an important system file! This situation may not be solved by guessing! Actually, it's nothing! The most serious result is to redo the system!

It may be --- your monitor is set to a resolution that is too high for your monitor to display. You can enter safe mode and then reboot to enter Windows normally.

Hard disk. System issues. Try it again.

Check the port of your graphics card, and then you can't open the case to see the PEI-E16* excuse to clean it up.

Summary. Your situation is that the monitor has no signal: 1. The reason why the monitor has no signal after the computer is turned on:

1. Memory problems (not plugged in well or gold finger oxidation). 2. Graphics card problems (not plugged in well or gold finger oxidation). 3. Power supply problem, whether the power supply is insufficient.

4. Motherboard problems. 5. The cable between the monitor and the graphics card is loose or damaged. 6. Display problems (abnormal high-voltage board, faulty backlight circuit, faulty AD driver board).

The computer monitor has a black screen, and the host computer keeps flashing a red light, what's going on?

Your situation is that the monitor has no signal: 1. The reason why the monitor has no signal after the computer is turned on: 1. Memory problems (not plugged in well or the gold finger is oxidized).

2. Graphics card problems (not plugged in well or gold finger oxidation). 3. Power supply problem, whether the power supply is insufficient. 4. Motherboard problems.

5. The cable between the monitor and the graphics card is loose or damaged. 6. Display problems (abnormal high-voltage board, faulty backlight circuit, faulty AD driver board).

I'm using a converter that's not.

It's not his business that the converter used for my computer and monitor is connected.

Probably. You reconnect it and double-check to see if it can be restored.

Summary. Your situation is that the monitor has no signal: 1. The reason why the monitor has no signal after the computer is turned on:

1. Memory problems (not plugged in well or gold finger oxidation). 2. Graphics card problems (not plugged in well or gold finger oxidation). 3. Power supply problem, whether the power supply is insufficient.

4. Motherboard problems. 5. The cable between the monitor and the graphics card is loose or damaged. 6. Display problems (abnormal high-voltage board, faulty backlight circuit, faulty AD driver board).

The computer monitor has a black screen, and the host computer keeps flashing a red light, what's going on?

Hello, I am helping you to inquire about the relevant information and will reply to you immediately.

Your situation is that the monitor has no signal to accompany the bright number: 1. The reason why the monitor has no signal after the computer is turned on: 1. Memory problems (not plugged in or the gold finger is oxidized).

2. Graphics card problems (not plugged in well or gold finger oxidation). 3. Power supply problem, whether the power supply is not wide. 4. Motherboard problems.

5. The cable connecting the monitor and graphics card is bent or damaged. 6. Display problems (abnormal high-voltage board, faulty backlight circuit, faulty AD driver board).

Unplug the main unit, plug it back in, and turn it on.

1. This situation is not lit.

2. There are many reasons:

1. The computer host is not turned on normally.

2. The direct signal line between the monitor and the computer host is not properly connected, or the signal cable is faulty.

3. Hardware problems such as graphics card, motherboard or memory.

Solution: 1. Turn on the host normally.

2. Reseat the VGA cable.

3. Reseat memory, graphics card, etc.

4. Use good memory and graphics cards to replace the original ones.

5. Replace or repair the motherboard if the memory and graphics card are faulty.

Problem Analysis:

The computer boot host indicator flashes, and the display screen is black, indicating that the computer has failed to pass the boot POST, which is divided into two situations: the screen is not powered on (the power indicator light is not on) or the power is powered on but there is no signal or "no sighal" is displayed, the former means that the power is not on or the power cord is not in contact or damaged, and the latter is generally the memory module or monitor data cable is not in good contact, or the memory, graphics card, monitor or data cable is damaged.

Handling suggestions:1If the monitor is powered on but no signal is displayed, turn it 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), turn on the chassis after powering off, replug the memory module, and wipe the gold finger with an eraser in one direction (the back of the thumb fingernail is also fine), and then turn on the power 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 can't do it, then it's simpler:

Palm or kick the chassis can be done (pay attention to the location: the front of the shell on the left and right sides of the chassis without an interface on the back of the shell; Attention Tract: Don't push too hard).

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.

Faults that are usually caused by poor hardware contact are recommended as follows:

1. Turn off the power, open the case, clean up the dust, especially the dust of the CPU fan, and check whether the CPU fan is rotating normally.

2. Power off, open the chassis, plug and unplug the memory, wipe the gold finger part with an eraser, and plug it back in (don't reverse it).

3. Plug and unplug the graphics card, wipe the gold finger part with an eraser, and reinsert it tightly (the buckle should be buckled).

4. Unplug the power cord, cut off the motherboard button battery, wait for three minutes, and then reinstall the motherboard.

5. If the above operations cannot solve the problem, it is recommended to send it to the maintenance center.

In 3 cases, 1 is that the monitor itself is damaged. 2.If it's a desktop, there may be a problem with the data cable connecting the monitor to the main unit.

3.Graphics card issues. No matter which of these 3 problems, you'd better press and hold the current host start button and turn it off coldly, but it's best not to pull the power supply directly, which will damage the computer a lot.

Display problem, this may be a problem with the display, aging problem, this needs to go to a professional testing center to test, how to judge that it is a display problem? We connect the computer directly to another monitor, and if there is no flickering problem, it means that there is a monitor problem.

Problems with computer settings, and the refresh rate of your computer's resolution can also cause your computer to flicker. After the previous question, the test is not a display problem, so let's test the resolution problem, adjust the resolution, and try to set it, will this kind of problem still occur?

The problem of the connection cable, which may lead to the poor connection of the output signal, in such a situation, this is very simple, it is to test it from a new one.

Power supply or voltage problems, sometimes the power is not good, such as: rural areas, large factories, etc., resulting in voltage instability, or, problems with the power supply in the computer host will also lead to various problems, which may affect the black screen of the display, and so on.

That's the problem of the computer host, if there is a graphics card, it may mean that it is a graphics card problem, this needs to go to the computer repair shop to test, it is safer, don't make a claim to buy a graphics card yourself, replace it.

Another problem is that the computer monitor is damp, which can also cause problems, and I have had it with my own computer before, and it has not occurred since the wet season has passed. In fact, there are many problems with the computer, such as dust in the computer and other reasons, take good care of the computer and clean it regularly.

A flashing red light on the computer is a signal light that the hard disk is reading data.

Your situation is that the monitor has no signal:

1. There is no signal on the monitor after the computer is turned on

1. Memory problems (not plugged in well or gold finger oxidation).

2. Graphics card problems (not plugged in well or gold finger oxidation).

3. Power supply problem, whether the power supply is insufficient.

4. Motherboard problems.

5. The cable between the monitor and the graphics card is loose or damaged.

6. Display problems (abnormal high-voltage board, backlight circuit failure, AD driver board failure) Second, the computer boot display has no signal solution:

1. Remove the memory module, wipe the gold finger of the memory module with an eraser, and then reinstall and fix it.

2. Remove the graphics card, wipe the gold finger of the graphics card with an eraser, and then reinstall and fix it.

3. Replace the power supply of the computer to see if the problem is solved.

4. If the motherboard is broken, find a professional maintenance personnel to check.

5. Reconnect the monitor and graphics card cable (replace a VGA cable).

6. If the display itself is a problem, find a professional maintenance personnel to check.

Black screen failures caused by a damaged host power supply or poor host power quality are common. For example, when you add some new devices, the display has a black screen failure, and the quality of the power supply is not good, and the lack of power is the main cause of the failure.