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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.
Note:
Some unexplained errors may be caused by duplicate IP addresses on
the network. Make sure that your MSS IP address is unique.
B.1 Power-up Troubleshooting
Problem situations and error messages are listed in Table B-1. If you cannot find an
explanation for your problem, try to match it to one of the other errors. If you cannot
remedy the problem, contact your dealer or Lantronix Technical Support.
Table B-1: Power-up Problems and Error Messages
Problem/Message Error
Remedy
The MSS is
connected to a power
source, but there is
no LED activity.
The unit or its power supply is
damaged.
Contact your dealer or Lantronix
Technical Support for a replacement.
The MSS is unable to
complete power-up
diagnostics.
This generally indicates a
hardware fault. One of the
LEDs will be solid red for three
seconds, followed by one
second of another color.
Note the blinking LED and its color, then
contact your dealer or Lantronix
Technical Support. The MSS will not be
operational until the fault is fixed.
The MSS completes
its power-up and
boot procedures, but
there’s no noticeable
serial activity.
There is a problem with the
serial connection or the set-up
of the serial device.
Check the terminal setup and the physical
connections, including the cable pinouts
(see Appendix C). Try another serial
device or cable, or cycle power on the
MSS.
A rapidly-blinking OK LED
may signal boot failure.
Reboot the unit. When the MSS is
running normally, the OK LED blinks
every two seconds.