What are the common faults of monitors and speakers? 10

If the display is used for a long time, all kinds of small problems will follow. Sometimes the solution to these small problems is relatively simple, with a pair of eyes can see the fault.

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.

Unable to hear and slow to react.

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The speaker monitor keeps ringing may be caused by the following:

1.Speaker failure: The internal parts of the speaker are faulty, such as short circuit of the speaker coil, broken sound film, etc., resulting in the speaker not working normally and producing continuous sound.

2.Line failure: Faulty connection between the speaker and the audio device, such as loose connectors, aging lines, etc., will also cause the speaker to ring continuously.

3.Amplifier failure: The amplifier is an important part of the speaker, and if the amplifier fails, it will cause the speaker to ring continuously.

4.Environmental interference: The environment around the speaker may interfere with the speaker, such as radio wave interference, electromagnetic interference, etc., resulting in a continuous ringing sound.

To solve the preceding problems, you can take the following methods to troubleshoot and solve the problems:

1.Check the speaker parts: check whether the coils and sound membranes inside the speaker are damaged, and if there is a problem, it needs to be replaced or repaired in time.

2.Connector inspection: Check whether the connector of the connecting line is loose and needs to be reconnected.

3.Check the amplifier: Check if the amplifier is faulty and needs to be repaired or replaced in time.

4.Eliminate interference: Try to avoid environmental interference around the speaker, such as trying to stay away from interference equipment such as noisy and microwave ovens.

In short, if the speaker display keeps ringing, you need to carefully check and troubleshoot the problem to avoid bigger problems. If the above methods do not solve the problem, it is recommended to contact a professional for processing.

There could be several reasons for the problem with the audio display not displaying. First of all, you can check if the speaker's power supply is connected properly and if the switch is turned on. If there is no problem with the power supply and switch, it may be that the display itself is faulty or the connection cable is loose.

You can never go back and try to replug the cable, or try using a different display to see if the problem is with your speaker. At the same time, if you have a remote control to operate the speaker, you can also try to check if there are any settings options for the display that are turned off. If none of these methods solve the problem, it is recommended that you contact a professional maintenance personnel for further service and repair.

The speaker will have an effect on the previous CRT display, the speaker (the speaker in the speaker is commonly known as the speaker) too close will magnetize the display, distorting the display color, and you will obviously notice that the corner of your monitor close to the speaker is green or yellow.

However, it will not affect the LCD display.

The fault of the playback belt is more prominent in daily maintenance, and it is a typical example of damage to the integrated circuit of the power amplifier, accounting for about 30% of the entire maintenance volume. Because the car audio power amplifier integrated circuit is a common circuit for collecting and knowing the sound and playing back, it has more chances of damage due to the influence of the car body's heat source, its own power generation heat, the heat source of the car body, and the unstable power supply. There is a problem that it is difficult to purchase the original type of manifold when the power amplifier circuit is faulty in daily maintenance, which is a practical problem that maintenance personnel can encounter.

It is not difficult to see from some machines that we usually come into contact with that the car audio amplifier circuit basically adopts BTL circuit, and this kind of integrated circuit peripheral parts are less, which is easier to repair by substitution method. However, when some of the more special power amplifier integrated circuits used on high-end machines are damaged, because this machine control volume is carried out in the electronic circuit search, it is not as potentiometric as the potentiometer control volume can intuitively find the signal source, and the power amplifier integrated circuit peripheral circuit also has a slight difference with the BTT circuit, therefore, the replacement method needs to be repaired after a more detailed judgment process to make the machine return to normal.