Power Led/Switch; Power Supply Power Led; Table 5-18. Power Led States; Table 5-19. Power Supply Conditions Mapped To Power Led States - HP Integrity rx6600 User's & Service Manual

Power LED/Switch

The front panel system power LED indicates the status of system power. It is incorporated inside the power
button itself.
The power button has a momentary switch (as opposed to a latching switch) that is recessed or covered to
prevent accidental activation/de-activation.
If the OS is up, pressing the power button for less than 4 seconds results in a graceful shutdown of the
operating system and a subsequent removal of system power. Pressing the power button for greater than 4
seconds results in a hard shutdown (system power removed). While the server is booting (before the system
has passed EFI_EXIT_BOOT_SERVICES), the BMC will power the server off immediately on a button press,
since there is no concept of soft shutdown in this state.
In the event that the OS is absent or hung, or that the manageability subsystem (specifically the BMC) in the
server is not responding, a greater than 4 second press of the power button is required to power down the
system (a less than 4 second press on the power button will have no effect).
To ensure that the system powers up in a deterministic fashion, the power button must be masked for 4
seconds after a power-down.
Table 5-18 lists the power LED states.
Table 5-18 Power LED States
Definition
No ac power to the system
System power is turned on
System is shut down, but ac and
housekeeping (standby) power are active.
For HA and safety reasons, this LED is run directly off the power rails, rather than run under firmware
control.

Power Supply Power LED

There is a 1 Hz Flashing Green POWER LED (PWR), located on each power supply, which indicates that ac is
applied to the PSU, and that housekeeping voltages are available. This same LED becomes Steady Green
when all power outputs are available. If this LED enters a 1 Hz Flashing Amber state, it indicates that the
power supply has failed, and a replacement unit is necessary.
Table 5-19 lists the power supply conditions mapped to POWER LED states.
Table 5-19 Power Supply Conditions Mapped to Power LED States
No ac power applied to any PSUs
No ac power applied to this PSU only
ac present; housekeeping on
Power supply dc outputs On and OK
Chapter 5
LED Off
Steady
Steady
Power Supply Condition
Flash Rate LED Color
Green
Amber
Troubleshooting
Power Subsystem (BPS and I/O VRM)
Power Supply
Power LED
Off
Off
Flashing Green
(Slow ~ 1 Hz)
Steady Green
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