Troubleshooting Procedures
5-1
5
Troubleshooting Procedures
5.1 Introduction
This section provides an overview of the fault isolation process, provides guidelines for
isolating 900 Series computer malfunctions to replaceable subassemblies and provides
instructions for executing diagnostics and interpreting error messages.
5.2 Overview of Fault Isolation Process
The fault isolation process (summarized in Figure 5-1) consists of the following steps:
♦
Checking the Notebook power system (including battery packs and AC adapter
connections) - refer to Paragraph 5.4.
♦
Checking Switch settings (ensuring
Power
is On and notebook correctly
configured)
- Pressing
the
Shift
key to ensure that Notebook is not in
Suspend mode
- Verifying if computer is configured to boot from the A: Drive or C: Drive
- Checking LCD brightness adjustment (press
Fn-Up Arrow
keys to
increase brightness)
- Ensuring that computer is not set for external monitor (press
Fn-F12
to
select internal screen)
♦
Undocking from the Mobile Productivity Base (if installed) and running
diagnostics to isolate problem to either the base or the notebook.
♦
Recording and attempting to resolve any displayed error messages or error
beeps (refer to Paragraph 5.3.3.1 and Tables 5-1 and 5-2)
♦
Rebooting the system (
Ctrl-Alt-Del
)
♦
If the computer is capable of running the Setup program; checking the serial
and parallel port configurations, Sound System enable/disable, and other
features that may affect system operation.
♦
Running PC-Doctor Diagnostics to further isolate problem area (refer to
Paragraph 5.5). For indicated hardware failures, cycling power and repeating
self test to verify that a hard failure has occurred.
♦
Removing and replacing suspect hardware (as described in Section 6 of this
manual) and retest the system using the diagnostic tests as described in
Paragraph 5.4.5.
Summary of Contents for Extensa 900 Series
Page 1: ...Maintenance Manual ExtensaTM 900 Series Notebook Computers 9813715 0001 December 1996 ...
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Page 138: ...A 2 Notebook Schematic Diagrams Figure A 1 Notebook Main Board Logic Diagrams Sheet 1 of 30 ...
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Page 171: ...MPB Schematic Diagrams B 3 Figure B 1 MPB CPU Board Logic Diagrams Sheet 2 of 3 ...
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