1. The whole monitor is powerless
This is a very simple fault. There are two types of LCD monitors, including internal power supply and external power supply, which are common outside the machine.
Regardless of the power supply, its structure is much simpler than that of the CRT monitor. The vulnerable small components are generally small components, such as fuse tubes, input inductors, switch tubes, voltage regulator diodes, etc. A relatively rare fault is that the power supply does not start up caused by the motherboard CPU. In fact, the principle is relatively simple. It is to use the keypad to the CPU, and then output a control signal through the CPU to drive the power conversion integrated circuit to work.
2. The display screen will not light up once it is on, but the power indicator light is always on.
This problem is generally caused by high voltage abnormality and is the operation of the protection circuit. In this case, the LCD screen is generally displayed, and the method of viewing is "slant". The key point of maintenance is the comparative repair method. Because, the design of high-voltage plates of current LCD displays is generally symmetrical, and there is basically no damage on both sides. Generally, the common problem of old machines is the step-up transformer and lamp tube, and the protection circuit and process problems of new machines are more common.
3. The screen is bright or dark.
This problem is generally a failure of the LCD screen. The bright wire failure is generally caused by a problem with the wiring connecting the LCD screen body. The dark wire is generally caused by the leakage of the screen body. The above two problems are basically of no maintenance value because the price of a screen is too high. But it will not affect lifespan
4. Flower screen or white screen.
This problem is generally a problem with the driving voltage of the screen. If the driving circuit of the screen is on the motherboard, it should be a failure of the motherboard. If the driving circuit of the screen is on the LCD screen, the screen should generally be replaced, and the maintenance risk is very high.
5. Color cast fault.
Generally, you can enter the maintenance adjustment mode to adjust.
6. Other relatively rare fault interference.
Under different working modes, some interference may occur in LCD displays, most of which are normal, and a few are caused by circuits. Because the special production process of LCD monitors has caused problems that can only be considered faults if they are detected in standard operating modes.
How to protect liquid display:
1. Avoid burning inside the screen
Remember, CRT monitors can burn out due to long-term work, and so for LCDs. So remember that if you are not in use, you must turn off the monitor or reduce the display brightness of the monitor, otherwise it will cause internal burnout or aging over time. Once this damage occurs, it is permanent and irreversible. Therefore, it must be taken seriously. In addition, if a fixed content is continuously displayed for a long time, it may cause some LCD pixels to overheat, resulting in internal burnout. In order to avoid this internal burnout, the following measures can be taken when not in use:
A: Please turn off the monitor when you are fine;
B: Often change the display content on the screen at different time intervals (such as running a screen saver);
C: Reduce the brightness of the display to a darker level;
D: Displays a completely white screen content.
2. Maintain the humidity of the environment
All users who have ever caused keyboard damage by sprinkling drinks onto the keyboard know this common sense. Don't let anything with moisture properties enter the LCD. If you find fog, you need to gently wipe it with a soft cloth before turning on the power supply. If the moisture content has entered the LCD, the LCD must be placed in a warmer and dry place so that the moisture and organic compounds therein can evaporate. Powering up the LCD containing humidity can cause corrosion of the liquid crystal electrode, which in turn causes permanent damage.
This is a very simple fault. There are two types of LCD monitors, including internal power supply and external power supply, which are common outside the machine.
Regardless of the power supply, its structure is much simpler than that of the CRT monitor. The vulnerable small components are generally small components, such as fuse tubes, input inductors, switch tubes, voltage regulator diodes, etc. A relatively rare fault is that the power supply does not start up caused by the motherboard CPU. In fact, the principle is relatively simple. It is to use the keypad to the CPU, and then output a control signal through the CPU to drive the power conversion integrated circuit to work.
2. The display screen will not light up once it is on, but the power indicator light is always on.
This problem is generally caused by high voltage abnormality and is the operation of the protection circuit. In this case, the LCD screen is generally displayed, and the method of viewing is "slant". The key point of maintenance is the comparative repair method. Because, the design of high-voltage plates of current LCD displays is generally symmetrical, and there is basically no damage on both sides. Generally, the common problem of old machines is the step-up transformer and lamp tube, and the protection circuit and process problems of new machines are more common.
3. The screen is bright or dark.
This problem is generally a failure of the LCD screen. The bright wire failure is generally caused by a problem with the wiring connecting the LCD screen body. The dark wire is generally caused by the leakage of the screen body. The above two problems are basically of no maintenance value because the price of a screen is too high. But it will not affect lifespan
4. Flower screen or white screen.
This problem is generally a problem with the driving voltage of the screen. If the driving circuit of the screen is on the motherboard, it should be a failure of the motherboard. If the driving circuit of the screen is on the LCD screen, the screen should generally be replaced, and the maintenance risk is very high.
5. Color cast fault.
Generally, you can enter the maintenance adjustment mode to adjust.
6. Other relatively rare fault interference.
Under different working modes, some interference may occur in LCD displays, most of which are normal, and a few are caused by circuits. Because the special production process of LCD monitors has caused problems that can only be considered faults if they are detected in standard operating modes.
How to protect liquid display:
1. Avoid burning inside the screen
Remember, CRT monitors can burn out due to long-term work, and so for LCDs. So remember that if you are not in use, you must turn off the monitor or reduce the display brightness of the monitor, otherwise it will cause internal burnout or aging over time. Once this damage occurs, it is permanent and irreversible. Therefore, it must be taken seriously. In addition, if a fixed content is continuously displayed for a long time, it may cause some LCD pixels to overheat, resulting in internal burnout. In order to avoid this internal burnout, the following measures can be taken when not in use:
A: Please turn off the monitor when you are fine;
B: Often change the display content on the screen at different time intervals (such as running a screen saver);
C: Reduce the brightness of the display to a darker level;
D: Displays a completely white screen content.
2. Maintain the humidity of the environment
All users who have ever caused keyboard damage by sprinkling drinks onto the keyboard know this common sense. Don't let anything with moisture properties enter the LCD. If you find fog, you need to gently wipe it with a soft cloth before turning on the power supply. If the moisture content has entered the LCD, the LCD must be placed in a warmer and dry place so that the moisture and organic compounds therein can evaporate. Powering up the LCD containing humidity can cause corrosion of the liquid crystal electrode, which in turn causes permanent damage.