(First check whether the adapter or other power cables are faulty or have poor contact.)
一、No backlight, no display:1.Is the PC power switch turned on?
कारण：The customer is unaware of the PC power switch.
समाधान：Press the PC power button to turn on the computer.
2.Power supply is normal, PC power button light does not illuminate, motherboard red light.
कारण:
Motherboard defect.
समाधान:Replace the motherboard.
3.Store data.
कारण:Motherboard storage capacity is full
समाधान:Battery discharge (remove the battery for about 5 सेकंड, then reinsert it)
4.RAM Installation (कंप्यूटर)
कारण:Memory module loose connection, loosened due to transportation vibration
समाधान:Heavy-duty truck memory module
5.RAM slot (कंप्यूटर)
कारण:Slot contact issue
Soluton:If there are dual card slots, you can switch to another slot.
6.High-voltage busbar
कारण：High-voltage busbar
समाधान：प्रतिस्थापन
7.Backlight cable
कारण：Poor backlighting
समाधान:प्रतिस्थापन
8.एलसीडी स्क्रीन
कारण：LCD Screen Fault
समाधान:प्रतिस्थापन
二、Backlight present, no display:The external monitor is displaying.
कारण：The BIOS resolution is incorrect.
Poor contact in the LCD screen cable
समाधान:Flash the BIOS
Unplug the display cable. If that doesn’t work, replace the display cable. Replace the display cable.
三、Black screen after entering the system:Brightness Settings Issue
कारण:Set brightness to minimum
समाधान:Increase the brightness on the external monitor.
四、Setup Issues：Whether BIOS and motherboard jumper settings are configured for power-on boot
कारण:Setting both power-on methods simultaneously will prevent the device from booting up.
समाधान:Disable a power-on startup configuration method
五、After running for a period of time, a black screen restart can restore it：प्रणाली
कारण：System error
समाधान：Reinstall the operating system
六、Touch display：Is the keypad switch turned off?
समाधान:Press the POWER button on the keypad.