Setup guide

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Appendix A
A. BIOS Error Codes
During Power-On Self-Test (POST) routines, which are performed each time the system is
powered on, errors may occur. Non-fatal errors are those which, in most cases, allow the system
to continue the boot-up process. The error messages normally appear on the screen.
The BMC may generate beep codes upon detection of failure conditions that do not allow the
system to fully boot. Beep codes are sounded each time the problem is discovered (for example,
on each power-up attempt) but are not sounded continuously. Common supported codes are listed
in Table A-1.
In Table A-1, each digit in the code is represented by a sequence of beeps whose count is equal to
the digit.
Table A-1 BMC Beep Codes
Beep Code Reason for Beep
Associated
Sensors Supported
1-5-2-1 No CPUs installed or first CPU socket is
empty.
CPU Missing sensor Yes
1-5-2-4 MSID Mismatch. MSID Mismatch
sensor.
Yes
1-5-4-2 Power fault: DC power is unexpectedly
lost (power good dropout).
Power unit—power
unit failure offset.
Yes
1-5-4-4 Power control fault (power good assertion
time-out).
Power unit—soft
power control failure
offset.
Yes
1-5-1-2 VR Watchdog Timer sensor assertion VR Watchdog timer
1-5-1-4 The system does not power on or
unexpectedly powers off and a power
supply unit (PSU) is present that is an
incompatible model with one or more
other PSUs in the system.
PSU status