What is the reason why the computer can turn on but the monitor does not display? 100

1. When the computer is first turned on, the screen of the monitor shakes very much, and sometimes even the icons and text cannot be seen clearly, but it will return to normal after a minute or two.

This phenomenon mostly occurs in wet weather, which is caused by moisture inside the display. To solve this problem completely, you can use the moisture-proof sand from the food packaging to string it with cotton thread, then open the back cover of the monitor and hang the moisture-proof sand near the tube socket at the end of the CRT neck. In this way, even in wet weather, the above "problems" will not occur again.

Second, after the computer is turned on, the monitor only hears its sound and does not see its painting, and it is pitch black. It takes more than a few dozen minutes for the screen to appear.

This is not due to moisture inside the monitor, but due to leakage of the picture header, which must be replaced. The method is to remove the back cover to see a small circuit board at the end of the picture tube, and the tube socket is soldered to the circuit board.

Carefully unplug the board, solder the header, go to the electronics store and buy the same header, and solder the header back to the board. At this time, do not rush to put the circuit board back, first find a small piece of 0 sandpaper, and carefully wipe the pins protruding from the rear of the picture tube tail with sandpaper. In particular, pay attention to the oxide layer on the pins, if you don't wipe it cleanly, it will soon become old**.

Okay, put the board back and you're done.

Third, there will always be lingering interference clutter or lines on the monitor screen, and there is also an annoying noise in the speaker.

This phenomenon is mostly caused by the poor anti-interference performance of the power supply. If you are too lazy to do it, you can replace it with a new power supply. If you have enough hands-on ability, you can also try to replace the filter capacitor in the power supply by yourself, which can often work; If the effect is not obvious, you can replace the switch tube together.

Fourth, the display screen is blurred.

This problem is mostly caused by the graphics card. If it's a new graphics card, it's probably that the card is of poor quality or incompatible, and then there's that the correct drivers haven't been installed. If the video memory is added to the old card, it may be caused by the difference between the newly added video memory and the original video memory model.

5. There are two vertical black bands on the edge of the monitor.

This phenomenon mostly occurs on older computers, which is caused by the lack of video memory on the graphics card. Older computer graphics cards had only 1 MB of video memory, which can occur if the resolution is set too high. To solve this problem, you can add video memory to the graphics card, and there is usually a socket for adding video memory on this type of graphics card.

6. The display screen is black.

There are many reasons for a black screen. If there is no signal transmitted to the monitor due to damage to the graphics card or disconnection of the monitor, the indicator light of the monitor will flash incessantly to indicate that no signal has been received. If the resolution is set too high, the maximum resolution of the display will also be blackened, and the display will be destroyed in the worst case, but the current display has a protection function, and it will be automatically protected when the resolution exceeds the set value.

In addition, hardware collisions can also cause black screens.

This is the legendary black screen pull.

Solution: 1. If there is a memory problem, take it out to clean up the dust, and then take an eraser to wipe the gold finger; 2. Graphics card, the graphics card may be loose, or there is too much dust, and the processing method is the same as memory; 3 The CPU temperature is too high, touch the CPU heatsink of the running computer with your hands, if it is too hot, there is a problem, and you may need to change the fan, because the fan may be too gray or broken.

4 Is there a problem with the monitor cable, this may be very small. 5. Weigh this opportunity to clean your machine thoroughly, maybe it would be good.

1. The graphics card cable may be loose. Plug the blue-headed cable behind the main unit back again.

2. Display resolution problem, if you estimate that the graphics card is loose, then remove the host cover, take the graphics card and plug it back in.

1. The graphics card is overclocked to a program that is not supported by the monitor, the solution: find a good monitor, change the refresh rate back to 60Hz, or go to safe mode to delete the graphics card driver, and then reinstall the driver.

Second, there is a problem with the signal line of the display, the solution: check whether the interface is loose.

Third, the display is broken.

Unplug the power cord, disassemble the case, remove the motherboard battery (quick discharge: use the battery edge to place on the iron sheet of the card battery for a few seconds), unplug the memory and graphics card, wipe the gold finger, and return. If it doesn't work, the way is still the same.

Problematic issues: poor hardware compatibility; Poor quality motherboards; The motherboard socket is not in good contact.

Poor contact of the graphics card!!

You can open the case, unplug the graphics card and plug it back in, and re-screw the display signal cable!

OK!

It should be too humid, use it often, just use it for a long time.

The data cable connecting to the monitor is loose.

Are you turning the monitor down too low?

1. Check the data interface behind the monitor to see if it is loose, plugged in tightly or unplugged and replugged.

2. If it is not displayed, connect the monitor to another host and see if it is displayed. If it is not displayed, it is a problem with the display and needs to be sent for repair, and if it is displayed normally, there is a problem with the graphics card.

3. Look at the back of the host, it is divided into independent graphics card and integrated graphics card, and the red frame below is the integrated graphics card, usually the display will be connected to it.

5. Use brushes and other tools to remove dust.

6. After reassembly, the display is normal, if it is not displayed, the graphics card needs to be sent for repair.

This answer applies to most computer models from brands like the HP Zhan 99 Pro G2 MT.

The steps to solve the problem are as follows:

1. The system power management is set to automatically turn off the display.

Solution: Some computers may have set up a power management plan, the monitor will automatically turn off after not operating the computer for a short time, then you can try to slide the mouse or tap the keyboard to re-wake the monitor, and the computer will return to normal after the screen lights up. If you have a stable power supply, consider changing the display auto-off mode to never.

2. There is a problem with the connection of the monitor or signal cable.

Solution: If you press the switch and can hear the sound of the system starting, or the squeak noise of the disk reading, it means that the computer has been started, but the display is still pitch black after a long time, which means that the computer display is broken, or the signal cable is loose, then you need to see if the indicator light of the display is on and whether the signal cable is plugged in.

3. The memory module is incompatible or the gold finger is oxidized or the contact is poor.

Solution: For memory failure, we can make a rough judgment by the sound of the motherboard alarm, if the motherboard is powered on, it emits a tick....Tick....The continuous interval of long sounds, one long and three short, or one long and one short (varies from BIOS to BIOS), can be judged as a memory error. The most common problems with memory are incompatibility and poor contact, if it is incompatible, you need to unplug one of them, and if it is poor, you need to properly clean the inside of the chassis.

Hello, is it the brightness of the web page, or the computer screen is not bright.

Questions. Yes.

It should be relatively low in brightness.

Did you adjust the brightness?

Questions. If the power goes out, the display will not light up if the call comes back on.

Is it a black screen or low brightness?

Questions. No.

Black screen. Oh oh oh, that's it.

Wait a minute. Turn off the computer normally and start it back after a while.

Desktop computers, right.

Questions. That's right.

Uh-huh. Questions.

Do you want to force a shutdown?

After shutting down, unplug the computer.

Right. Force shutdown.

Try again later.

Remember to replace the display switch as well.

Possible causes:1If there's a problem with the monitor, it's broken.

2.There is a problem with the cable connecting the monitor and computer.

3.Memory module problem, memory module bad contact.

4.Motherboard electrostatic reaction.

5.There is a problem with the motherboard.

Solution: First of all, see if the monitor is broken, you can power on separately to see if the monitor is normal.

If it's broken, you can try a different monitor.

Cable Problems and Solutions:

First of all, check whether there is a problem with the connecting cable, whether the connection is loose, or whether the connection cable is not in good contact.

Just update the cable.

Memory module problems and solutions:

The problem of memory modules is generally that the memory modules are dirty, resulting in poor contact. The general problem arises with Goldfinger.

The easy way to do this is to wipe it with an eraser.

Motherboard electrostatic reaction solution:

Motherboard problems and solutions:

For the problems of the motherboard, professionals need to test it, and do not disassemble it without permission, otherwise you will bear the consequences.

Generally speaking, if you press the main chassis, the screen does not reflect at all, you check whether the plug is loose to connect the VGA and the graphics card! 1.Check if the line is normal2

If it's an integrated graphics card, then you don't have to look at 3If it's a discrete graphics card, just remove the graphics card and snap the gold finger! I put it on 4

It may be a memory problem, a memory problem, and it is possible that the screen will be black! Follow these to see if it's a motherboard issue. You turn on the speaker to see if you can get the sound of the computer interface, if it can be turned on normally, it means that the memory and the motherboard are fine, the problem is that the graphics card is best, if you move the parameter settings in the BIOS, it will also cause the screen not to be displayed, at this time you have to discharge, remove the battery, and then put it on, and the BIOS will restore the production settings.

But this is after your VGA is plugged into the integrated graphics card, and some motherboards will be automatically recognized!

1. Check whether the connection of the monitor is normal, if the wiring is loose, please plug the wiring firmly and plug it in.

2. If the monitor connection is normal, move the host to the neighbor's house and try to borrow the neighbor's monitor to turn on to verify whether it can be displayed normally. If you can, it means that there is a problem with your home monitor. If it doesn't, there is a problem with the computer interface or motherboard.

3. If it can be displayed normally, take the monitor to the repair shop for repair. Maintenance** generally looks like around 100-150. The main problem is usually a damaged high-voltage bag or a lamp problem.

4. If it can't be displayed normally, take the host to the repair shop for maintenance, and determine the maintenance according to the specific problem.

1. The monitor is not powered on.

2. The signal cable of the display is not connected.

3. There are two display interfaces on the host, and the interfaces are not connected, such as the motherboard with integrated graphics card, and an independent graphics card is added, and the display signal cable is connected to the integrated graphics card when wiring.

4. The computer host is not fully started, but only powered on.

There's a problem with your monitor's driver, and you say "beep" a few times after turning it on. beep", and then I heard a "beep" sound, this is the graphics card is not plugged in, you can check it and plug it in again, about the display first green and then yellow, this is a problem with the display picture tube.

The monitor is not compatible with the motherboard of the host, and my previous computer was like this, and the staff told me this when I took it to the computer city.

Check to see if the monitor switch is turned on, or it may be that the power cord of the monitor is loose, unplug it and plug it back in.

The graphics card's cable is not connected to ......The display power supply is in poor contact......

If the light on the monitor is on, the VJA cable behind the monitor is not connected.

If there is only one computer to judge the failure of the computer power supply or motherboard, try to change the power supply, if it does not work, it is the motherboard.

There are two sockets on the back of the main unit, which may be plugged in by mistake. That's the question for me.

If you don't turn on the monitor, or the wiring on the monitor is loose, you can take it to the repair point to take a look.