IBM 72335LU - System x3850 M2 Installation Manual page 76

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See the 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.
Lit light path
diagnostics LED with
the system-error LED
also lit Description
DASD A hard disk drive has failed or has
been removed.
Note: The error LED on the failing
hard disk drive is also lit.
RAID The RAID controller has indicated a
fault.
BOARD The microprocessor board or I/O
board has failed.
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IBM System x3850 M2 and System x3950 M2 Type 7141: Installation Guide
Action
1. Reinstall the removed drive.
2. Reseat the following components:
a. Failing hard disk drive
b. SAS hard disk drive backplane
c. SAS signal cable
d. I/O board shuttle assembly
3. Replace the components listed in step 2 one at a
time, in the order shown, restarting the server each
time.
1. Check the BMC log or the system-error log for
information.
2. Reseat the following components:
a. RAID controller, if possible
b. Hard disk drives
c. I/O board shuttle assembly
3. Replace the components in step 2 one at a time,
in the order shown, restarting the server each time.
1. Find the failing board by checking the LEDs on the
microprocessor board and I/O board.
2. Reseat the failing board.
3. Replace the failing board.