IBM System x3550 M3 Type 4254 Installation And User Manual page 40

Table 2. Light path diagnostics panel LEDs (continued)
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", in the Problem Determination and Service Guide 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.
LED Description
DASD A hard disk drive has failed or is
missing.
RAID Reserved.
BRD An error has occurred on the
system board.
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IBM System x3550 M3 Types 4254 and 7944: Installation and User's Guide
Action
1. Check the LEDs on the hard disk drives for the drive with
a lit status LED and reseat the hard disk drive.
2. Reseat the hard disk drive backplane (see the Problem
Determination and Service Guide for more information).
3. For more information, see the "Hard disk drive problems"
under the Troubleshooting tables in the Problem
Determination and Service Guide.
4. If the error remains, replace the following components in
the order listed, restarting the server after each:
a. Replace the hard disk drive.
b. Replace the hard disk drive backplane.
5. If the error remains, replace the following components one
at a time, in the order listed, restarting the server after
each:
a. Replace the hard disk drive.
b. Replace the hard disk drive backplane.
6. If the problem remains, go to http://www.ibm.com/systems/
support/supportsite.wss/docdisplay?brandind=5000008
&lndocid=SERV-CALL.
1. Check the LEDs on the system board to identify the
component that caused the error. The BRD LED can be lit
due to any of the following reasons:
v Battery
v Missing PCI riser-card assembly
v Failed voltage regulator
2. Check the system-error log for information about the error.
3. Replace any failed or missing replacement components,
such as the battery or PCI riser-card assembly.
4. If a voltage regulator has failed, (trained service technician
only) replace the system board.