Kontron NSN2U IP Network Server - Manual (Page 83)

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Table 6. LED Definitions
LED Name Function Location Color Notes
ID Aid in server
identification
from the back
panel
Control panel
ID button and
rear right
corner of
server board
Blue On = chassis
identification
active via command
or by pressing the
button
System status Visible fault
warning
Control panel
and rear
corner of
server board
Green or
amber
Green = system
ready
Green blinking =
degraded
Amber = critical
error or non-
recoverable
Amber blinking =
non-critical error
Hard disk
drive
activity*
Drive state Control panel Green or
amber
Green blinking =
activity, no action
required
Amber = drive fault
Off = no access/no
HDD fault
*See NSN2U
Technical Product
Specification for
more information
about hard drive
LED operation
Memory fault
(1 – 12)
Identify
failing memory
module
DIMM end,
rear of
server
Amber On = fault
Diagnostic
LEDs, 1 – 8
(LSB, bit1,
bit2, MSB)
Display port
80 POST codes
Center back
edge of
server board
Each LED
can be
off,
green,
amber,
red
See the POST code
table in the
S5520UR Technical
Product
Specification
CPU 1 and CPU
2
fan fault
Identify fan
failure
On each fan
carrier
Amber On = fault
CPU 1 and CPU
2
fault
Identify
processor
failure
Behind
processor
socket
Amber On = fault
5v Standby Identify 5v
standby power
on state
Front left of
server board
Amber On = 5v standby
power on