89
Table 7. 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 CG2100
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
Front left of
server board
Amber
On = 5v standby
power on
