My monitor is black for 20 and my monitor is black

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.

According to the phenomenon, it is not a "host system" problem.

The monitor has a poor contact area, and it is related to temperature, it is best to find an expert to help check it.

Should you check that your drive is not compatible with your computer configuration.

The problem is complicated, check the refresh rate first, and the normal 17 display is up to 85. Consider the others.

See if the CRT has been burned.

Check that the computer parts are plugged in: Check that the monitor cable is plugged into the host connector, and then check that the contact between the graphics card and the motherboard's I-O slot is good. Confirm if the monitor is damaged:

If the monitor and graphics card are installed firmly, you can try it with a normal monitor, if the screen is no longer black, then the monitor is damaged. Confirm whether there is a problem with the fan: If the display is not damaged, check whether the CPU fan is running, if it is running, you can use a multimeter to measure whether the voltage output is normal to 12V, 15V, if it is not normal, you can change the power supply to try it.

There is an obvious problem with the display, and there is a problem with the picture tube in the display panel, according to the picture, it can be determined that it has nothing to do with the computer, and the picture tube in the monitor is broken. Next to the plug of your monitor, if you plug in a tram charger, the plug will go black. There are also questions that I don't understand.

Causes and solutions:

A black screen glitch can be in one or more of three ways:

1 monitor failure, 2 data cable failure, 3 graphics card failure.

Solution: Use a laptop to test whether the data cable and the monitor are normal. Start the notebook, and then connect the external desktop monitor, through the function key + screen switch key, the screen is displayed normally, shake the data cable, the screen does not flash, and the display is still normal, then the wire inside the data cable is unlikely to break.

At this point, you can be sure that the monitor and the data cable are good.

Then the graphics card is left, after some series of dusting, wiping the gold finger, and reconnecting it, the fault is still the same. The graphics card is faulty. The graphics card needs to be repaired or replaced for the unit to work properly.

If the graphics card is faulty, the host computer is still working normally. Under normal circumstances, the computer will test whether the hardware is normal, and it is found that the graphics card cannot be turned on if it is faulty, and this graphics card is only a problem with the output signal of the graphics card, that is, the operation of each part of the graphics card is normal, data processing, conversion, etc., everything is normal, but the output signal is on the way to the transmission interface (this interface is connected to the display data cable), a certain part of the electronic components is damaged, like a landslide, the only way into the mountain is blocked, the car can not cross, can not reach the destination; Therefore, it is normal to detect the communication between each accessory and the motherboard when booted, and think that the hardware of each part is operating normally. Today, I took a break to measure the bad graphics card with a multimeter, and found that the resistance value of a chip resistor connected to the VGA interface has changed, and after replacing a normal resistor with a soldering iron, the graphics card will resume normal use.

Please supplement the computer configuration first. And make sure that you are using the computer when the screen goes black.

It could be a motherboard problem, it could be a problem with the signal side of the display, you try to plug it in and unplug it, or change the host or monitor to gradually troubleshoot the fault range.

I'll tell you the reason for the black screen.

1.Overclocking This network shouldn't be on the net But the heat dissipation is not good, the display is aging, the screen will be black, this possibility is relatively large, the next Master Lu or something, look at the temperature of the graphics card, if it is too high, repair the heat dissipation.

2.If there is an orange light when the monitor is black, it has something to do with the motherboard memory or something, and this problem is more serious.

3.The screen is black, and the power indicator is not lit, and the display itself is faulty, simply put, the power supply is loose4The screen is black, and the power indicator is on The fault may occur in the monitor, graphics card, motherboard, or signal cable Simply put, the graphics card is loose The AC power supply is unstable.