Unit
(FRU)
LED
Function
Location LED Color OFF ON Blink
Power and Packaging LEDs
Rack
Indicator
Drawer Sum
Top of Rack
Amber (1x) Normal Fault Identify
AC Input Green (1x) No Input AC Good N/A
System Unit
Attention
Operator
Panel + Rear
Amber (2x) Normal Fault Identify
Power
Operator
Panel + Rear
Green (2x)
No AC System
Powered On
v Standby
v Transition of Power from
Standby to Power-On
(Blinking intervals may
accelerate before
remaining on solid)
Fans Identify Fan Top Amber (4x) Normal Fault N/A
Power
Supply (AC)
Input Source
Power
Supply Front
+Top
Green (1x) No Input AC Input
Good
N/A
Fault Power
Supply Front
+Top
Amber (1x) Normal Fault Fast Blink - Identify
Slow Blink - SPCN
communication failure .25
Hz
DC Output
Good
Power
Supply Front
+Top
Green (1x)
DC Off DC Good Standby
Disk Drives
(DASD)
Activity DASD Board Green (4x) No Activity Activity N/A
Remove
Identify
DASD Board Amber (4x) Normal Action Identify
Optional
Media
No LED
Electronics Component LEDs
PCI Adapter
Connectors
(Slots)
Activity Chassis
Rear, Inside
System Next
to Adapter
Green Refer to the PCI Adapter Table on page 547.
Identify Chassis
Rear, Inside
System Next
to Adapter
Amber Refer to the PCI Adapter Table on page 547.
Memory
DIMMs
Identify Processor
Housing
(Top)
Amber (8x) Normal Identify
CEC
Backplane
Identify CEC
Backplane
Amber (1x) Normal Identify
Processor
Board
Identify Processor
Housing
(Top)
Amber (1x) Normal Identify
Chapter 12. Fault and Attention LEDs 545
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