• If possible, back up all compute node settings, including the settings for any options installed in the
compute node.
Before you replace the system-board assembly, complete the following steps:
1. Read “Safety” on page iii and “Installation Guidelines” on page 21 to ensure that you work safely.
2. Power off the corresponding compute node that you are going to perform the task on.
3. Remove the compute node from the chassis (see “Remove the compute node from the chassis” on page
24).
4. Carefully lay the replacement system-board assembly (system board FRU) and the defective system-
board assembly (defective node) side-by-side on a flat, static-protective surface.
Important: When you replace the system-board assembly, you must update the compute node with the
latest firmware or restore the pre-existing firmware. Make sure that you have the latest firmware or a copy of
the preexisting firmware before you proceed (see “Firmware updates” on page 4 for more information).
See “System-board layout” on page 13 for more information about the locations of the connectors, switches,
and LEDs on the system board.
To remove and replace the system-board assembly, complete the following steps:
Watch the procedure. A video of the installation process is available:
• Youtube: https://www.youtube.com/playlist?list=PLYV5R7hVcs-B4_LYuT9X1MRWBU6UzX9gO
• Youku: http://list.youku.com/albumlist/show/id_50481482
Important: To avoid damage when replacing a defective system-board assembly, transfer internal
components between the defective system-board assembly and the replacement system-board assembly
one at a time. Unless otherwise noted, install each internal component in the replacement system-board
assembly immediately after removing it from the defective system-board assembly.
Step 1. Remove any storage drives, optional drive components, and hard disk drive bay fillers from the
defective system-board assembly and set them aside on a static-protective surface (see “Remove
a 2.5-inch hot-swap drive” on page 26 ).
Notes:
• When removing the storage drives, make note of the drive bay from which the drive was
removed so that you can install the drive back in to the same drive bay
Step 2. Remove the storage drive bezel from the defective system-board assembly and immediately install
it on the replacement system-board assembly (see “Remove the bezel” on page 35 and “Install the
bezel” on page 36 ).
Step 3. Remove the covers from both compute nodes (see “Remove the compute node cover” on page
42). Keep the cover that comes with the replacement system-board assembly for reference and re-
install it on the defective system-board assembly prior to returning the defective system-board
assembly.
Step 4. If a RAID adapter is installed in the defective system-board assembly, remove it and set it aside on
a static-protective surface (see “Remove a RAID adapter” on page 78).
Step 5. Remove the hard disk drive backplane from the defective system-board assembly and immediately
install it in the replacement system-board assembly (see “Remove the 2.5-inch drive backplane” on
page 28 and “Remove the 2.5-inch drive backplane” on page 28).
Step 6. Install any removed disk drives, optional drive components, and disk drive bay fillers into the
replacement system-board assembly (see “Install a 2.5-inch hot-swap drive” on page 27).
Step 7. Remove the air baffle from the defective system-board assembly and set it aside (see “Remove the
air baffle” on page 31).
Chapter 3. Hardware replacement procedures 83
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