35
4.2.3 Field Replaceable Unit (FRU) Inventory Device
The BMC implements the interface for logical FRU inventory devices as specified in the Intelligent
Platform Management Interface Specification, Version 2.0. This functionality provides commands
used for accessing and managing the FRU inventory information. These commands can be
delivered through all interfaces.
The BMC provides FRU device command access to its own FRU device and to the FRU devices
throughout the server. The BMC controls the mapping of the FRU device ID to the physical device.
4.2.4 BMC Beep Codes
The BMC may generate beep codes upon detection of failure conditions. Beep codes are
sounded each time the problem occurs (for example, on each power-up attempt), but are not
sounded continuously. Frequently encountered codes are listed in the table below.
Each code corresponds to a specific sequence of beeps. Each digit in the code represents the
number of beeps.
BMC Beep Codes
Code
Reason for Beep Associated
Sensors
1-5-2-1
No CPUs installed or first CPU socket is empty.
CPU Missing Sensor
1-5-2-4
MSID Mismatch.
MSID Mismatch Sensor.
1-5-4-2
Power fault: DC power is unexpectedly lost (power good
dropout).
Power unit
– power unit
failure
offset.
1-5-4-4
Power control fault (power good assertion timeout).
Power unit
– soft power
control
failure offset.
1-5-1-2
VR Watchdog Timer sensor assertion
VR Watchdog Timer
1-5-1-4
The system does not power on, unexpectedly powers off,
or a power supply unit (PSU) that is incompatible with one
or more PSUs in the system is present
PS Status