NEC Express5800 Series User Manual page 38

Chapter 1 General Description
(1) UID switch function
When the server does not turn on, the UID switch can be used to display Server Health Summary.
(2) Power failure lamp
The following table shows the sub systems corresponding to how the power failure lamp works.
Mother board
Processor
Memory
PCI riser board PCIe slot
LOM card
RAID controller/SAS controller
Mother board PCIe slot
Power backup plane or storage back plane
Power supply unit
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Sub system
Express5800/R120h-2E User's Guide
4. Names and Functions of Parts
How the lamp works
Blinks once.
Blinks twice.
Blinks 3 times.
Blinks 4 times.
Blinks 5 times.
Blinks 6 times.
Blinks 7 times.
Blinks 8 times.
Blinks 9 times.