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C h a p t e r 5C h a p t e r 5
Troubleshooting Procedures
Service Guide 5-1
5.1. Introduction
This chapter provides an overview of the fault isolation process, provides guidelines for isolating 67x
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:
• Notebook power system (including battery packs and AC adapter connections)
• Switch settings (ensure Power is On)
• Press the Shift key to ensure that Notebook is not in Suspend mode
• Verify if computer is configured to boot from the A: Drive or C: Drive.
• Check LCD brightness adjustment (press Fn-Up Arrow keys to increase brightness)
• Ensure that computer is not set for external monitor (press Fn-F12 to select internal screen)
• Record and attempt to resolve any displayed error messages or error beeps (refer to
Paragraph 5.2.3.1 and Tables 5-1 and 5-2)
• Try rebooting the system (Ctrl-Alt-Del)
• If the computer is capable of running the Setup program; check the serial and parallel port
configurations, Sound System enable/disable, and other features that may affect system
operation.
• Remove and replace suspect hardware (as described in Chapter 6 of this manual) and retest
the system.