1. If the host is running normally and there is startup music, it may be that the signal line connected between the monitor and the host is loose or in poor contact, so it is necessary to check whether the video output line is loose or connected in the wrong position.
The host with graphics card needs to connect the video output line to the graphics card, and the host without graphics card needs to be connected to the motherboard.
The possibility of display damage is not ruled out.
2. If it hasn't been solved, it may be a memory stick problem. The solution is as follows:
(1), turn off the host and unplug the power supply. Open the case and take out the memory module. Be careful to press the buckles on both sides at the same time before taking it out.
(2) Check whether the gold finger of the memory module is damaged. If it is damaged, it is recommended to replace it to avoid burning the motherboard.
③ Wipe the golden finger of the memory stick with an eraser to remove rust and oxide film.
(4), and then insert the memory card into the motherboard, pay attention to the positive and negative, so as not to accidentally hurt the memory stick.
Insertion method: Open the buckle twice, put the memory card into the memory card slot and press it hard.
⑤ Plug in the power supply, turn on the computer and check whether the problem is solved. Extended data:
A monitor is also commonly called a monitor. The display is an IO device belonging to the computer, that is, an input and output device.
It is a display tool, which displays some electronic files on the screen through a specific transmission device and then reflects them to human eyes. Common monitor faults can be divided into soft faults and hard faults. When the monitor can't display normally, it is necessary to simply analyze where the fault is, whether it is the software setting problem or the internal circuit of the monitor is broken, and then determine whether it needs maintenance. According to the fault classification of the monitor, there are the following fault phenomena: the computer turns on the black screen, and no image appears after a few minutes.
At this point, you should first check whether the power indicator on the display panel is on. If it doesn't light up, check whether the power plug of the monitor is connected correctly.
If the power cord is plugged in (make sure that the power socket has electricity, try to change a jack), the power switch is turned on, but the indicator light of the display is not on, which indicates that the internal circuit of the display is faulty and should be sent to a special maintenance department for repair.
If the power indicator light of the monitor is on, you should restart the computer at this time, and pay attention to whether the indicator light of the host computer is flashing and whether the host computer has a "beep".
If so, the computer has started normally.
At this time, check whether the signal line connection between the monitor and the host is normal, whether the 15 pin D plug connected to the host is loose, and whether the pins in the plug are broken, crooked or short.
If the connection is normal, there is something wrong with the monitor and it should be sent for repair.
The energy-saving display will automatically work in the corresponding state and mode according to the line field synchronization signal sent by the host, and the indicator light on the panel will also indicate the corresponding state.
Usually flashing orange off or sleeping, orange hanging, yellow waiting, green normal display.
The monitor is black. It's not the host's fault to check it carefully. At this time, it is best not to power on the monitor continuously or for a long time, so as to avoid the fault expanding.
It is usually because the display does not support the display mode sent by the host computer, which is often higher than the display mode of the display, resulting in the confusion of the images on the screen and the inability to see the images and characters on the screen clearly.
If it is a monitor with automatic pattern recognition, it may be in a black screen state, but at this time the indicator light at the bottom of the panel is green.
At this time, you can restart the computer to enter the safe mode, change the display mode to 640*480, and then restart the computer to recover.
If this method doesn't work, you can delete the graphics card driver in safe mode and then reinstall the graphics card driver in normal mode.
In addition, when the display memory of the graphics card fails, the fixed position on the screen will be confused, while other places will display normally.
There are also some damaged graphics cards that cause the screen to appear, but the probability of this situation is very small.
The obvious color loss is the lack of red or yellow, or blue, or the color may be confused, but the image details are clear.
At this time, if you look at the monitor for a little longer, your eyes will be uncomfortable and there will be a tingling feeling.
At this time, you can check the connection plug between your monitor and the host to see if the pin inside is broken, and then check whether the graphics card is loose. If there is no problem, the monitor can be sent for repair.
When red (R), green (G) and blue (B) appear on the whole screen, the internal circuit of the display must be broken. The phenomenon of white screen indicates that the backlight panel can work normally. First, judge whether the motherboard can work normally. Press the power switch to see if the indicator light responds. If the indicator light can change color, the motherboard is working normally. 1. Check whether the connecting cable of motherboard signal output to the screen is in poor contact (the connecting cable or screen can be replaced); 2. Check whether the voltage of each working point of the motherboard is normal, especially the power supply voltage of the screen; 3. Check the line field signal and clock signal (from input to output) with an oscilloscope; 4. Replace it with a general board writing program. If the indicator light does not respond or light up, it means that the motherboard is not working properly. 1) Check the voltage of each operating point of the motherboard, and pay attention to the voltage of EPROM (about 4.8V), reset voltage (high and low level, depending on the model) and CPU voltage. If there is a power short circuit, carefully find the short circuit position, there will be the possibility of PCB copper foil short circuit; 2) Check whether the pins of CPU are in good contact with the motherboard; 3) Check whether the motherboard chip and CPU work, and measure whether the crystal oscillator starts to vibrate with an oscilloscope; 4) Replace the CPU or re-burn the CPU when necessary. Color Block If there are irregular color blocks on the display screen, check whether there are magnetic objects around the display screen, such as radio, mobile phone, CD player, magnetic screwdriver, etc. Also pay attention to the monitor and air conditioners, refrigerators, washing machines, televisions and other household appliances do not get too close. If the speaker is not antimagnetic, it will cause the display screen to be magnetized. If it is caused by the above reasons, you can use the manual degaussing function of the display to solve the above problems. If the monitor is not degaussed manually, it can be turned off for 30 minutes or more, and then turned on again. Repeat the above process two or three times. There is no signal 1 when the machine is turned on. Observe that the motherboard lights up, the CPU fan does not turn on, and the power supply fan does not turn on. It is estimated that it may be worse if the motherboard does not alarm; 2. The CPU frequency set by the jumper-free motherboard in 2.CMOS is wrong, which may also lead to a failure that cannot be displayed. In this regard, as long as CMOS is cleared, it can be solved; 3, the memory stick does not oxidize, take the memory stick down and use an eraser to erase it and then plug it in to see, and the general problem can be solved; 4. Press the BIOS chip on the motherboard to make it inserted tightly; If the fault still exists, eliminate it; 5. Try to replace the reliable host power supply; If the fault still exists, it is that the bus of the motherboard is out of order and needs maintenance. The refresh frequency of the dithered display is set too low: when the refresh frequency of the display is set below 75Hz, the screen will often shake and flicker. If the refresh rate is set higher, such as higher than 85Hz, the phenomenon of screen jitter will generally not appear again. The power transformer is too close to the monitor and chassis: when the power transformer works, it will produce great electromagnetic interference, causing screen jitter. Therefore, do not put the power transformer near the chassis and monitor. Aging of inferior power supply or power supply equipment: Many inferior computer power supplies are easy to cause computer circuit blockage or power supply capacity can not keep up. When the system is busy, the display will especially appear the phenomenon of screen jitter. In addition, if the power supply equipment of the computer is aging, it is easy to cause the same problem. The sound box is placed too close to the display: the magnetic field effect produced by the sound box will interfere with the normal work of the display, causing the display to produce magnetic interference phenomena such as screen jitter and color crosstalk. Virus cause: Some computer viruses will disturb the screen display, such as character inversion, screen jitter, graphic flip display, etc. Screen jitter scripts that can be seen everywhere on the Internet are enough for users to be as big as a cow. Graphics card problem: the display of the monitor is closely related to the graphics card. If there is something wrong with the computer screen, consider whether it is the reason of the graphics card, such as poor contact of the graphics card.