NEC MH4500 - Manual (Page 73)

Upgrading Your System 4-3
Electronic devices can be easily damaged by static electricity. To prevent
damage, keep them in their protective packaging when they are not installed in
your system.
Preparing Your System for Upgrade
Depending on the upgrade, you need one or more of the following tools:
T Phillips screwdriver (#1 bit and #2 bit)
T flat-head screwdriver
T small needle nose pliers
T pen or pencil
T ESD workstation or antistatic wrist strap (recommended).
Preparing the Equipment Log
Use the equipment log form at the end of this guide to record the model and
serial number of your system, all installed options, and any other pertinent
information specific to your system. You need this information when
configuring your system.