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4. Troubleshooting
(1) Network Issues
Symptom
Corrective Procedure
Cannot access LAN
▪
Check if hub or switch is working correctly
▪
Check RJ45 cable connection
▪
Check if LAN LEDs are on/off
▪
Reinstall LAN card
▪
Replace motherboard
(2) MSR Issues
Symptom
Corrective Procedure
MSR does not respond
▪
Check MSR reader cable connection
▪
Check motherboard and LCD cable connection
▪
Check MSR board cable connection
(3) USB Issues
Symptom
Corrective Procedure
USB port doesn’t work
▪
Check Windows device manager for device recognition
▪
Check USB device status and connection
▪
Erase and re-install USB driver
▪
Change USB device
(4) LCD Issues
Symptom
Corrective Procedure
LCD backlight doesn’t work
▪
Check LCD cable connection
▪
Check inverter cable connection
▪
Replace inverter cable
▪
Change LCD panel