Item Description Status
1 UID button/LED
1
Solid blue = Activated
Flashing blue:
• 1 flash per sec = Remote management or
firmware upgrade in progress
• 4 flashes per sec = iLO manual reboot sequence
initiated
• 8 flashes per sec = iLO manual reboot sequence
in progress
Off = Deactivated
2
NIC status LED
1
Solid green = Linked to network
Flashing green (1 flash per sec) = Network active
Off = No network activity
3
Health LED
1
Solid green = Normal
Flashing green (1 flash per sec) = iLO is rebooting
Flashing amber = System degraded
2
Flashing red (1 flash per sec) = System critical
2
4
Power On/Standby button and
system power LED
1
Solid green = System on and normal operation
Flashing green (1 flash per sec) = Performing power-
on sequence
Solid amber = System in standby
Off = No power present
3
1
When all four LEDs described in this table flash simultaneously, a power fault has occurred. For more information, see
Power fault LEDs on page 10.
2
If the health LED indicates a degraded or critical state, review the system IML or use iLO to review the system health
status.
3
Facility power is not present, power cord is not attached, no power supplies are installed, power supply failure has
occurred, or the front I/O cable is disconnected.
UID button functionality
The UID button can be used to display the HPE ProLiant Pre-boot Health Summary when the server will not
power on. For more information, see the latest HPE iLO User Guide on the Hewlett Packard Enterprise
website.
Power fault LEDs
The following table provides a list of power fault LEDs, and the subsystems that are affected. Not all power
faults are used by all servers.
10 UID button functionality
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