IBM 7944, Installation And User Manual

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Table 4. Light path diagnostics panel LEDs (continued)
• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See “Parts listing” to determine which components are customer replaceable units (CRU) and which
components are field replaceable units (FRU).
• If an action step is preceded by “(Trained service technician only)”, that step must be performed only by a
trained service technician.
LED
Description
Action
DASD A hard disk drive has failed or is
missing.
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.
3. For more information, see the “Hard disk drive problems”.
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/support/
entry/portal/docdisplay?lndocid=SERV-CALL
.
RAID Reserved.
BRD An error has occurred on the
system board.
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:
• Battery
• Missing PCI riser-card assembly
• 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.
Rear view
Use this information to view the controls, LEDs, and connectors on the rear of the server.
The following illustration shows the connectors and LEDs on the rear of the server.
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System x3550 M3Installation and User's Guide