NEC MH4500 - Manual (Page 72)

4-2 Upgrading Your System
This chapter includes procedures for
T replacing/upgrading the real-time battery, Pentium Xeon processor
cartridge, and DIMM modules on the system board
T adding optional ISA and PCI boards
T installing 3 ½-inch SCSI hard drives
T installing optional 5 1/4-inch devices (tape drive, other device).
Contact your sales representative or dealer for a list of approved optional
peripheral devices.
!
WARNING
The DC push button on/off switch on the front panel does
not turn off system AC power. Also, +5vdc is present on the
system board whenever the AC power cord is connected
between the system and an AC outlet. Before performing
any procedures, first power off the dc push button switch
located on the front panel. Make sure your system is
powered off and the AC power cord is unplugged from the
system. Failure to disconnect power before opening your
system can result in personal injury and equipment damage.
!
CAUTION
The server management logic on the system board monitors
system voltage changes. When powering down your system,
you may experience a 1- to 5-second delay from the time
you press the push button power on/off switch and your
system powering down. This is normal system operation and
is required by the server management logic.
!
CAUTION
Operating your system with the access cover removed can
damage system components. For proper cooling and airflow,
always replace the access cover before powering on.
Observing Static Precautions
An electrostatic discharge (ESD) can damage disk drives, option boards, and
other components. You can provide some ESD protection by wearing an
antistatic wrist strap attached to chassis ground (any unpainted metal surface)
when handling system components.