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B-1
B: Troubleshooting
This Appendix discusses how to diagnose and fix errors quickly yourself without having to
contact a dealer or Lantronix. It will help to connect a terminal to the serial port while
diagnosing an error to view any summary messages that are displayed.
When troubleshooting, always ensure that the physical connections (power cable, network
cable, and serial cable) are secure. If you have trouble with wireless networking, it may help
to connect the MPS to a wired Ethernet network to verify that it is working properly and to
check the wireless settings.
Note: Some unexplained errors may be caused by duplicate IP addresses on
the network. Make sure that your MPS IP address is unique.
B.1 Power-up Troubleshooting
There are several possible error situations if the LEDs do not flash.
Table B-1: Error Messages
Message Diagnosis/Remedy
Power-up diagnostic failure (hardware
failure)
Note which LED is blinking and its color, then contact
your dealer or Lantronix Technical Support.
The MPS boots but does not try to load
the Flash ROM code
Press the Test/Reset button. A brief description of the
problem will be queued to the parallel port and printed.
Network Error: The ACT LED will
blink yellow 2-3 times per second
A. Make sure the Ethernet network cable is properly
connected and reboot the MPS.
B. If option A fails to resolve the problem, reload
Flash ROM. Refer to Appendix D.