4-1
014–002250–01
4
Expanding and maintaining
computer hardware
This chapter contains procedures you should perform whenever you
open your computer chassis.
The first major section in this chapter, “Maintaining your system,”
outlines what you should do if a problem occurs with your system
hardware, and describes periodic maintenance required to keep the
system operating properly.
You need to follow the directions in the “Avoiding electrostatic
discharge (ESD) damage” section each time you open your computer
unit or unpack a new component.
The last sections of this chapter explain how to open and close the
computer unit.
IMPORTANT:
For information on the periodic maintenance of individual system
components such as tape, disk, and diskette drives, refer to the
device–specific manual for operating each drive listed in Guide to
AViiON
and DG/UX
System Documentation.
Maintaining your system
Occasionally, you need to perform routine maintenance on your
computer system. Most often, however, maintenance for your
AViiON 550 or 5500 series system involves replacing a component
that has failed. We refer to the subassemblies that you can easily
remove and install as customer replaceable units, or CRUs.
If a computer system problem occurs
If you have a problem with your computer system, first refer to the
manual Operating AViiON
550 and 5500 Series Computers for a
list of problems that could occur during powerup; the manual
provides suggestions for resolving these problems.
If you have determined that the problem is in an external storage
subsystem, refer to the manual that came with the subsystem
(listed in the Preface) for troubleshooting suggestions.
If your computer passes powerup testing but still indicates a
hardware problem, you might want to run a diagnostic test on the
system or a particular component. Refer to the manual Using
AViiON
Diagnostics and the AV/Alert Diagnostic Support System
for a description of diagnostic utilities available for your system,
and instructions on how to run them.
Summary of Contents for AViiON 550 Series
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