Is the indicator light on the monitor on? If not, it means that there is something wrong with your power version and it needs to be repaired. If the indicator light is on, the screen will dim. Please check your cable and video card. If there is no problem, there is something wrong with the logical version of your monitor. If there is a boot logo screen, then check whether the data cable of your monitor and graphics card is plugged in and whether the host computer starts normally.
Extended data:
Common failures of LCD screen:
1.LCD white screen: a 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 there is poor connection between the signal output from the motherboard and the screen.
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 with an oscilloscope.
Second, the LCD screen is black: first of all, we must determine whether it is a motherboard problem or a backlight problem. You can check whether the indicator light is responsive. If the indicator light is not on, you should check the power supply part of the motherboard.
1, use a multimeter to measure the main power supply operating point and whether the fuse is blown. If it burns out, cut off the power supply. Measure whether the working point of the main power supply is short-circuited with a resistor. If there is a short circuit, carefully find the wires (whether the copper foil of the circuit board is short-circuited) and all related components.
2. If there is no short circuit, it can be repaired with reference to the phenomenon of white screen to ensure that the voltage and signal input and output of each working point are in normal working condition.
Third, the LCD lacks color:
1, check whether there is a short circuit or virtual welding between the main chip and the connector.
2. Check whether the cable from the screen to the motherboard is in poor contact, such as cable arrangement.
3, if necessary, replace the motherboard, cable, and even screen to find out the problem. Fourth, the LCD button is out of order.