It may be that the touch key is in poor contact with the motherboard, so it is recommended to find after-sales maintenance.

Touch screen is an inductive liquid crystal display device, which can receive input signals such as contact. When touching the graphic buttons on the screen, the tactile feedback system on the screen can drive various connecting devices according to the pre-programmed program, which can be used to replace the mechanical button panel, and the LCD screen can create vivid audio-visual effects.