NEC Express5800 Series Maintenance Manual page 124

Chapter 2 Configuring and Upgrading the System
4. Loosen the screws securing the CPU/IO module handle to press down the handle.
5. Hold the black levers of the CPU/IO module and pull it off.
Pull it off until it is locked and stopped.
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Important Before you pull out a CPU/IO module, check the rear of the server to make sure
cables for peripheral equipment or network are disconnected.
If any cables are connected, keep a record of where the cables are connected and
disconnect all cables from the module you are going to remove.
If you cannot disconnect the LAN cable easily, disconnect while pressing the latch with a
Tips
slotted screwdriver.
Important

Do not hold part other than the handle to pull the module.

Handle the CPU/IO module carefully. Do not drop the module or bump it against
parts in the device when you remove it.
Express5800/R320e-E4, R320e-M4 Maintenance Guide (Linux)
5. Installing and Replacing Optional Devices