Part I Service Scenarios
Repair 102
No. Fault Description Cause Analysis Measure
Degenerated trackball
performance
Replace the trackball
5 The touch sensitive
function of the
touchscreen failed
Touch mapping error Restore touch mapping through
mapping corrections of Doppler
Touch sensitive function or
touch line failed
Replace the touchscreen assembly
or touch line
3.2.6 Troubleshooting of LCD Display
3.2.6.1 Involved Modules or Boards
No. Description Remarks
1 Display Both
2 Mainboard
3 PC module
3.2.6.2 Information to Be Collected
No. Information to Be Collected Remarks
1 Backlight of the display Much brighter in the darkness
2 Display status via HDMI external display
device
/
3 Video lock light of the mainboard On means the video source output from the
PC is not locked, and Off means the video
source input is normal
4 Screen display
3.2.6.3 Troubleshooting of Display
No. Fault Description Cause Analysis Measure
1 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
LCD screen failed Replace the LCD
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