1. Check the host power supply and whether it is working properly. First, check whether the power 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. Excessive or too 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 connections with the motherboard, because the power switch and reset button on many inferior cases often break 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 monitor power is connected properly. When the monitor is powered on, there is a "squeak" sound, and the power indicator of the monitor is on. When the user moves to the monitor screen, there is a "sizzle" sound, and the hair on the back of the hand stands up.
3. Check whether the signal line of the industrial display 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 display is black and the speaker in the host emits one long and two short beeps, the industrial 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 its slot contact Check whether there is a foreign body 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 cracking, 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.
The above content is the possible cause of the black screen failure of the industrial display. If the black screen problem occurs, you can refer to the above methods to try to solve it. If it can't be solved, please contact the manufacturer for repair in time. Do not disassemble the machine without authorization to avoid greater failure.
