NEC Express5800/T120h User Manual page 36

Chapter 1 General Description
(1) Function of UID switch
If the server does not turn on, the UID switch can be used to display ProLiant Pre-boot Health Summary.
(2) Power failure LED
The following table shows a list of the power failure LEDs and affected subsystems. Not all power failure LEDs
are used on all servers.
Motherboard
Processor
Memory
PCI riser card PCIe slot
LOM card
RAID controller
Motherboard PCIe slot
Power backplane or storage backplane
Power supply unit
36
Subsystem
Important
If the LEDs in multiple DIMM slots are lit, further troubleshooting is required.
Remove all the other DIMMs and test each bank of DIMMs. Replace each
DIMM in the bank with a properly working DIMM to identify the faulty DIMM.
Express5800/T120h User's Guide
4. Names and Functions of Parts
LED status
Flashes once
Flashes twice
Flashes 3 times
Flashes 4 times
Flashes 5 times
Flashes 6 times
Flashes 7 times
Flashes 8 times
Flashes 9 times