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