Texas Instruments 570CD 5 Troubleshooting Procedures

5Troubleshooting Procedures

5.1 General

This section provides the followi ng information:

•Overview of the fault isolation process

•Guidelines for isolating computer malfunctions to replaceable

subassemblies

•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:

•Quick Check of the following:

•Notebook power system (including battery packs and AC

Adapter connections)- refer to Paragraph 5.4.

•Switch settings (ensure Power switch is On, and press

Standby switch to ensure that Notebook is not in Standby

mode; press Shift to ensure the notebook is not in

Auto-Suspend mode.

•All external cabling (if any).

•Check LCD Contrast adjustment (Dual Scan version only).

•Record and attempt to resolve any displayed error messages/LED

indications (refer to Paragraph 5.3 and Table 5-1).

•Record and attempt to resolve any series of beeps emitted from the

notebook indicating test failure (refer to Table 5-2).

Troubleshooting Procedures 5-1

Contents

Main Page Contents Preface 1 General Description 2 Installation 3 Operating Instructions 4 Theory of Operation 5 Troubleshooting Procedures 6 Field Service A Self Test Error Messages B PC-Doctor Diagnostics Preface Introduction Intended Audience Contents Other Manuals About the System Ordering Parts and Supplies 1 General Description 1.1 1.2 Features Model 570CD Model 570CDT Model 1.3 Configuration P/N Suffix Configuration P/N Suffix 1.4 Page 1.4.1 1.4.2 1.4.3 Glidepad Select Buttons n 1.4.3.1 Controls and Indicators n 1.4.4 ^ 1.4.5 n 1.4.6 1.4.7 1.5 1.6 1.6.1 1.6.2 1.7 Specifications Page Specifications Models 570CD/575CD Models 570CDT/575CDT 1.8 2 Installation 2.1 2.2 n 2.3 c n 2.3.1 2.3.2 2.3.3 2.4 c 2.5 2.5.1 Page 2.5.2 2-6 Installation Figure 2-3 Parallel Port Location/Pinouts 2.5.3 c 2.5.4 2.5.5 2.6 c AC Adapter 2.7 AC Power (120VAC to 230 VAC, 50 to 60 Hz) 2.8 2.9 2.10 3 Operating Instructions n 3.1 3.2 3.2.1 3.2.2 3.3 3.3.1 Page 3.3.2 3.3.3 3.3.4 3.3.5 3.3.6 3.3.7 3.3.8 3.3.9 Page 4 Theory of Operation 4.1 4.2 4.2.1 MAIN BOARD 4-2 Theory of Operation System Controller 82C557 Figure 4-1 Notebook Functional Block Diagram Address Range Device Controller Channel Address Function Priority Interrupt Number Interrupt Source n 4.2.2 4.2.3 4.2.4 c 4.2.5 4.2.6 4.2.7 4.2.8 4.2.9 Page 4.2.9.4 DC-DC Converter/Battery Charger Circuit 5 Troubleshooting Procedures 5.1 5.2 SEE PARAGRAPH 5.3.3 Figure 5-1 Troubleshooting Flowchart See Appendix B (PC-Doctor) 5-2 Troubleshooting Procedures 5.3 5.3.1 recharged battery pack if battery is discharged) 5-4 Troubleshooting Procedures Figure 5-2 Troubleshooting Block Diagram n 5.3.3 5.3.4 5.3.5 Page Interactive Tests Supporting Online documentation Page 5.3.5.3 Running PC-Doctor n 5.3.5.4 Quitting PC-Doctor n 6 Field Service c 6.1 6.2 6.2.1 c 6.2.2 6.2.3 6.2.4 6.3 c 6.4 and Assemblies 6.4.1 Page 6.4.2 Page Item No. 6.5 c Procedures n 6.5.1 Pack 6.5.3 6.5.4 Modules (DIMMs) 6.5.5 6.5.6 6.5.7 Assembly 6.5.8 6.5.9 6.5.10 6.5.11 n 6.5.12 6.5.13 6.5.14 6.5.15 c Appendix A Self Test Error Messages A.1 Error Messages A-1 Table A-1 Self Test Error Messages Error Message Corrective Action Table A-2 POST Checkpoint List A-2 Error Messages Checkpoint No. Description Error Messages A-3 Checkpoint No. Description A-4 Error Messages Page B PC-Doctor Diagnostics B.1 PC-Doctor Diagnostics B-1 B.2 B.3 Table B-1 PC-Doctor Key Assignments B-2 PC-Doctor Diagnostics Table B-2 Test Selection Menu Special Keys B.4 n B.5.1 B.5.2 B.5.3 B.5.4 B.5.5 B.6 B-6 PC-Doctor Diagnostics B.7