Check the mainframe power supply, whether the work is normal. Firstly, the power supply of the main engine system is determined by checking whether the power indicator light of the main engine cabinet panel is on or not and whether the power fan is rotating.Secondly, the multimeter is used to check whether the external voltage meets the requirement. Excessive or low voltage may cause the main power supply to overvoltage or undervoltage circuit automatic shutdown protection.In addition, it is important to focus on checking the quality of power switch and reset key as well as the correct connection between them and the motherboard, because many power switches and reset keys on inferior chassis are often damaged after several times of use, resulting in the black screen display of the whole machine. If the power supply is damaged, it can be solved by replacing the power supply.
Check the power supply of the display.When the monitor is powered up, there is a "click" sound, and the power indicator light of the display is on. When the user moves to the screen of the display, there is a "click" sound, and the back of his hand is bristled with sweat.
Check whether the industrial monitor signal line is in good contact with the display card.If there is a lot of dirt at the interface, broken needles and other damages will lead to poor contact, the display black screen.
Check whether the display card is in good contact with the motherboard.If the monitor screen is black and the horn in the host is buzzing, the industrial monitor shows that there is a problem in the connection between the display card and the motherboard, or the connection between the display card and the display card is problematic, it is important to check whether the slot contacts well and whether there is foreign matter in the slot. The display card is replaced by a motherboard slot for testing. In order to determine whether there is a problem with the slot.
Check whether the display card is working properly.Check whether the chip on the display card can burn, crack marks and whether the cooling fan on the display card is working, and whether the cooling performance is good. Change a normal display card to exclude damage to the display card.
If there is a black screen problem, we can try to solve it by referring to the above methods. If it can not be solved, please contact the manufacturer for repairs in time. We must not disassemble the machine without authorization, in order to avoid causing greater failure.
