NEC PowerMate Professional 9000E Series User Manual page 168

Occasionally, you may encounter a problem with your
computer. In most cases, the problem is one that you can
solve yourself.
This chapter helps you identify and solve problems that may
occur during system installation or during normal use. It also
provides precautions, troubleshooting checklists, and
procedural steps that help you isolate specific system
problems. In addition, BIOS, system, and disk status user
information is provided.
The DC push-button on/off switch on the front
panel does not turn off the 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
doing the procedures in this guide, make sure
that your system is powered off and the AC
power cord is unplugged from the back of the
chassis. Failure to disconnect power before
opening your system can result in personal injury
and equipment damage.
Operating your system with the side panels
removed can damage your system components.
For proper cooling and airflow, always replace
the side panels before powering on your system.
5-2 Solving System Problems
!
WARNING
! CAUTION