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Troubleshooting
A4 Processor Board Assembly
A4 Processor Board Assembly
The A4 Processor board assembly is serviced as an assembly only; no component
level repair is supported. For details on the functionality of this assembly see
Chapter 3, "Assembly
Descriptions".
Boot-Up or Initialization Problems
Typical failures of the A4 Processor board assembly will cause the instrument to
not boot-up or initialize properly. Of course, these types of failures can also be
caused by a variety of other assemblies as well. In order to determine whether a
problem such as this is being caused by a defective A4 Processor board assembly,
first see the section in this chapter titled
"Instrument Boot Up Process"
to eliminate
other possibilities.
BIOS Settings
As with other types of PC processor board assemblies the N9039A A4 Processor
board assembly has a number of settings particular to the hardware on the board.
These settings are saved in a separate memory location on the board and accessed
by the BIOS (Basic Input Output System) Setup Utility. If these settings are
changed from those that the instrument was initially shipped with this could cause
a problem with the booting and/or functionality of the instrument.
If the instrument is having a problem booting up, but is functional enough to enter
the BIOS Setup Utility you will want to verify that the BIOS settings have not been
changed. The instrument was originally shipped with the settings shown in
Figure
2-9
through
Figure
2-13.
Accessing BIOS Setup Utility
To access the BIOS Setup Utility you will need to have an external USB keyboard
connected to the instrument. Then, when the initial Agilent Technologies splash
screen is displayed at power-up, press F2 on the keyboard. Once this is pressed you
should see a display like that of
Figure 2-8
just prior to entering the BIOS Setup
Utility.
If you select to use the "Load Setup Defaults" function found on the BIOS Exit
menu
(Figure
2-13) you will then need to reset two settings. They are:
• "CK-408 Spread Spectrum" to "Enabled"
(Figure
2-11)
• "IDE 2:" under "Boot priority order:" to position "1"
(Figure
2-12)
54
Chapter 2
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Table of Contents
Troubleshooting
