B-1
B: Troubleshooting
This Appendix discusses how you can diagnose and fix errors quickly 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’s IP address is unique.
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.