Power Supply Power Led; I/O Vrm - HP AB464-9003F Service Manual

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 four second press of the Power button is
required to power down the system (a less than four 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 four seconds after a power-down.
Table 56 lists the power LED states.
Table 56 Power LED States
LED Color
Green
Amber
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 57 lists the power supply conditions mapped to POWER LED states.
Table 57 Power Supply Conditions Mapped to Power LED States
Power Supply Power
LED
Off
Off
Flashing Green (Slow
~ 1 Hz)
Steady Green
Flashing Amber (Slow
~ 1 Hz)
The Power Supply Power LED is visible on the power supply's exterior face.

I/O VRM

Table 58 lists the I/O power events that light the diagnostic panel LEDs.
Table 58 I/O Power Events That Light Diagnostic Panel LEDs
Diagnostic Sample IPMI Events
LEDs
I/O Power Type 02h, 02h:07h:03h
VOLTAGE_DEGRADES_TO_NON_RECOVERABLE
162 Troubleshooting
Flash Rate
LED Off
Steady
Steady
Power Supply Condition
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
Power supply failure (includes overvoltage, overcurrent, overtemperature, and fan failure)
State
No AC power to the system
System power is turned on
System is shut down, but AC and housekeeping (standby) power
are active.
Cause Source Notes
Voltage BMC A voltage on
on the I/O
CRU is power
i n adequat e assembly is
out of range