3Com PathBuilder S21x Installation Manual page 38

Powerup Diagnostics
Power Up
Sequence
Hardware Failure
Diagnostic Failure
Powerup Failure
3-4
When the PathBuilder S21x switch power cord is plugged into the power supply
outlet, you will see the following powerup sequence:
Stage when...
1 POWER (GREEN) lights
turns on.
2
TEST (GREEN) comes on
and blinks five times
3 STATUS (GREEN) comes on
and blinks at slow rate.
TEST/WATCHDOG
(ORANGE) light also remain
on.
4 STATUS (GREEN) light
stays off for up to 10 seconds,
then turns green.
If the TEST light turns on and remains on, one or more of the diagnostic tests have
failed, indicating there is a hardware problem. Contact 3Com for possible repairs to
your PathBuilder S21x switch.
If the TEST light does not blink at all, but the Status light is on, the diagnostic
software image is corrupted. Perform a download of the software option bundle.
If the STATUS light blinks continuously, at a constant rate, the software bundle in
Flash memory is corrupted. Perform a cold load of the software option bundle. See
the Software Installation and Coldloading Manual (Part No. T0028) for more
information.
...this indicates
PathBuilder S200 series switch is
receiving power.
Diagnostics executes for 30 seconds.
Indicates software is being downloaded
from FLASH.
Software is initializing your system
configuration.
Powering on the PathBuilder S21x Switch