Part I Service Scenarios
Repair 103
No. Fault Description Cause Analysis Measure
2 Control panel powered on normally, and the
operation function buttons have a response
No display (blank screen) on the LCD
Normal display on HDMI external display device
Mainboard failed Replace the
mainboard
3 Control panel powered on normally, and the
operation function buttons have no response
No display (blank screen) on the LCD
No display on HDMI external display device. The
video lock light is off
Mainboard failed Replace the
mainboard
4 Control panel powered on normally, and the
operation function buttons have no response
No display (blank screen) on the LCD
No display on HDMI external display device. The
video lock light is on, and the touchscreen displays
It is very likely
that the mainboard
failed
Preferentially
replace the
mainboard
5 Control panel powered on normally, and the
operation function buttons have no response.
No display (blank screen) on the LCD
No display on HDMI external display device. The
video lock light is on, and the touchscreen displays
PC Module failed Replace the PC
Module
6 The inserted AC screen displays normally, but the
gesture or touchscreen does not display
Screen board
failed
Replace the main
display
7 The inserted AC screen does not display, and the
gesture or touchscreen does not display
Screen board
failed
Replace the main
display
8 Only one screen can display The board below
the no-display
screen or
corresponding
screen is abnormal
Replace the main
display assembly