IBM x3550 Problem Determination And Service Manual page 157

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, "Parts listing, Type 7978 and 1913 server," on page 29 to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Lit light path
diagnostics LED with
the system-error or
information LED also
lit Description
None An error has occurred and cannot be
diagnosed, or the Advanced System
Management (ASM) processor on the
Remote Supervisor Adapter II SlimLine
has failed. The error is not represented
by a light path diagnostics LED.
OVER SPEC The power supplies are using more
power than their maximum rating.
PS1 The power supply in bay 1 has failed.
PS2 The power supply in bay 2 has failed.
CPU A microprocessor has failed.
VRM Reserved.
CNFG Microprocessor configuration error.
MEM A memory error has occurred.
NMI A machine check error has occurred.
S ERR Reserved
SP The service processor has failed.
DASD A hard disk drive error has occurred.
BRD An error has occurred on the system
board.
FAN A fan has failed, is operating too slowly,
or has been removed. A failing fan can
also cause the TEMP LED to be lit.
Action
Check the system error log for information about
the error.
Replace the failing power supply, or remove
optional devices from the server.
Replace the failed power supply.
Replace the failed power supply.
Make sure that the failing microprocessor, which is
indicated by a lit LED on the system board, is
installed correctly. See "Installing a microprocessor"
on page 87 for information about installing a
microprocessor.
Reserved.
v Check the microprocessor options for
compatibility.
v Check the system error log for information
indicating incompatible components.
Replace the failing DIMM, which is indicated by the
lit LED on the system board.
Check the system error log for information about
the error.
Remove ac power from the server; then, reconnect
the server to ac power and restart the server.
If a Remote Supervisor Adapter II SlimLine is
installed, replace it.
Check the LEDs on the hard disk drives and
replace the indicated drive.
v Check the LEDs on the system board to identify
the component that is causing the error.
v Check the system error log for information about
the error.
Replace the failing fan, which is indicated by a lit
LED near the fan connector on the system board.
Chapter 5. Diagnostics
139