NEC N8100-1223F User Manual page 428

9-66 Upgrading Your Server
7.
Firmly hold the processor board and pull it out from the chassis.
NOTE:
The processor board is very heavy (max. 7 kg). Pay attention not to
drop it.
8.
Put the processor board on a dry, clean, and static-free place.
Installation
Install the processor board in reverse order of the removal steps.
Notes when removing the processor board