NEC HX4500, User Manual, Page: 74 / 160

Upgrading Your System 4-3
This section contains step-by-step instructions for removal and installation of all the
major system components. When you disassemble the server, note the orientation and
placement of any cables or shielding that you remove.
!
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.