Removing the compute node

Use this information to remove the compute node.

Note

This procedure should be performed only by trained service technicians.
Before you replace the system board, make sure that you backup any features on demand (FoD) keys that were enabled. Reactivate any Features on Demand features after replacing the system board. Instructions for automating the activation of features and installing activation keys is in the IBM Features on Demand User's Guide. To download the document, go to Lenovo Features on Demand website, log in, and click Help.
When you replace the system board, you must either update the server with the latest firmware or restore the pre-existing firmware that the customer provides on a diskette or CD image. Make sure that you have the latest firmware or a copy of the pre-existing firmware before you proceed.
When you replace the system board, make sure that you remove the Integrated Management Module Advanced Upgrade and place it on the new system board. For information about the Advanced Upgrade, see Using the remote presence and blue-screen capture features
Note
You have to reactivate the Features on Demand (FoD) after replacing the system board.

Before you remove the compute node, complete the following steps:

Read Safety and Installation guidelines.
If the compute node is installed in an Lenovo NeXtScale n1200 Enclosure, remove it (see Removing a compute node from a chassis for instructions).
Carefully lay the compute node on a flat, static-protective surface, orienting the compute node with the bezel pointing toward you.
Obtain the following for use during the replacement procedure (see Parts listing, Lenovo NeXtScale nx360 M4 Compute Node Type 5455).
- Alcohol wipes (part number 59P4739)
- RFID tag (required only if the compute node came with a RFID tag attached to the bezel)
- T8 torx screwdriver (part number 00FK488, provided on the back of the chassis)
- Thermal grease kit (part number 41Y9292)

Important

When you replace the system board, you must update the compute node with the latest firmware or restore the preexisting firmware. Make sure that you have the latest firmware or a copy of the preexisting firmware before you proceed.

See System-board layouts for more information about the locations of the connectors, jumpers, and LEDs on the system board.

To remove the system-board assembly, complete the following steps:

Remove the cover (see Removing the compute node cover).
Remove all of the installed components in the following list from the system-board assembly; then, place them on a static-protective surface or install them on the new system-board assembly.
- DIMMs (see Removing a memory module).
- Air baffles (see Removing the air baffle).
- Hard disk drives and hard disk drive bay fillers (see Removing a 3.5-inch hard disk drive, Removing a 2.5-inch hard disk drive, and Removing a 1.8-inch hard disk drive).
- Microprocessors, heat sinks, and microprocessor heat-sink fillers. Use the microprocessor installation tool that comes with the replacement microprocessor to remove each microprocessor from the system-board assembly and install each one immediately in the new system-board assembly (see Removing a microprocessor and heat sink and Replacing a microprocessor and heat sink).
- Hard disk drive backplate (see Removing the hard disk drive backplate).

If you are instructed to return the compute node, follow all packaging instructions, and use any packaging materials for shipping that are supplied to you.

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