Section 5 Troubleshooting Procedures; Introduction; Overview Of Fault Isolation Process - Texas Instruments Extensa 660 Series Maintenance Manual

5.1 Introduction

This section provides an overview of the fault isolation process, provides guidelines for
isolating 660 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)
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)
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 5.5.
Troubleshooting Procedures
Troubleshooting Procedures 5-1
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