How to deal with the black screen failure of industrial liquid crystal display
A black screen appears in the daily work of industrial LCD screens, what should I do, don’t worry, today I will summarize several reasons for the black screen caused by industrial LCD screen failures:
1. Check the power supply of the host and whether it is working properly. First, check whether the power supply indicator on the panel of the mainframe chassis is on and whether the power supply fan rotates to determine whether the mainframe system is supplied with power. Secondly, use a multimeter to check whether the external voltage meets the requirements. Excessively high or low voltage may cause automatic shutdown protection of the host power supply over-voltage or under-voltage circuit. In addition, it is important to check the quality of the power switch and reset button and the correctness of their connection with the motherboard, because the power switch and reset button on many low-quality chassis often damage after being used several times, causing the entire Nothing is displayed on the machine's black screen. If the power supply is damaged, replace the power supply to solve it.
2. Check whether the LCD power supply is connected properly. When the LCD screen is powered on, there will be a “squeak” sound, and the power indicator of the LCD screen will be on. When the user moves to the LCD screen, there will be a “sizzle” sound, and the hair on the back of the hand will stand up.
3. Check whether the signal line of the industrial LCD screen is in good contact with the display card. If there is a lot of dirt at the interface, broken needles and other damages will cause poor contact and a black screen on the display.
4. Check if the display card is in good contact with the motherboard. If the LCD screen is black and the speaker in the host emits one long and two short beeps, the industrial LCD display indicates that there is a problem with the connection between the display card and the motherboard, or there is a problem with the connection between the display card and the display, you can focus on checking Check whether the slot contact is good. Whether there is any foreign matter in the slot, change the graphics card to a motherboard slot for testing to determine whether there is a problem with the slot.
5. Check if the display card can work normally. Check whether the chip on the graphics card can be burnt, the traces of cracks, and whether the cooling fan on the graphics card is working and whether the heat dissipation performance is good. Replace with a working graphics card to rule out whether the graphics card is damaged.
If you cannot find out the cause by yourself, please contact the industrial LCD screen manufacturer for repair in time.
