(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?
سبب：The customer is unaware of the PC power switch.
حل：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.
سبب:
Motherboard defect.
حل:Replace the motherboard.
3.Store data.
سبب:Motherboard storage capacity is full
حل:Battery discharge (remove the battery for about 5 ثوان, then reinsert it)
4.RAM Installation (حاسوب)
سبب:Memory module loose connection, loosened due to transportation vibration
حل:Heavy-duty truck memory module
5.RAM slot (حاسوب)
سبب:Slot contact issue
Soluton:If there are dual card slots, you can switch to another slot.
6.High-voltage busbar
سبب：High-voltage busbar
حل：استبدال
7.Backlight cable
سبب：Poor backlighting
حل:استبدال
8.شاشة LCD
سبب：LCD Screen Fault
حل:استبدال
二、Backlight present, no display:The external monitor is displaying.
سبب：The BIOS resolution is incorrect.
Poor contact in the LCD screen cable
حل: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
سبب:Set brightness to minimum
حل:Increase the brightness on the external monitor.
四、Setup Issues：Whether BIOS and motherboard jumper settings are configured for power-on boot
سبب:Setting both power-on methods simultaneously will prevent the device from booting up.
حل:Disable a power-on startup configuration method
五、After running for a period of time, a black screen restart can restore it：نظام
سبب：System error
حل：Reinstall the operating system
六、Touch display：Is the keypad switch turned off?
حل:Press the POWER button on the keypad.
