Texas Instruments 60X 5.3 Troubleshooting Procedures

Troubleshooting Procedures 5-3

5.3 Troubleshooting Procedures

The built-in self test program and the disk resident diagnostics program (PC-Doctor)

are useful tools in computer troubleshooting. However, if the computer has a power,

keyboard or display problem, you must first solve this problem before running

diagnostics. If the computer powers up and displays messages on the LCD or emits a

series of beeps, skip to Paragraph 5.3.3 for further instructions.

5.3.1 T roubleshooting a Power Supply Problem

If the computer does not power up when the Power Switch is set to the ON position,

you most likely have a malfunction in the power subsystem (loss of power at the AC

outlet, faulty AC adapter, discharged Battery Packs, or faulty Power Supply on the Main

Board). With a power problem, all LEDs are extinguished, the LCD screen is blank, the

system does not respond when the suspend switch is pressed several times

consecutively and no drive activity can be heard. The computer is unable to load

software and displays no visible signs of activity. To fault isolate a power problem,

check the following:

♦AC adapter and Battery - Plug in the AC adapter and double-check all

connections on the adapter and computer. Ensure that the Notebook Power

switch is set to the On position and that the system is not in Suspend or

sleep mode.

♦Measure the voltage at the AC outlet or plug in a known good appliance (e.g.

a lamp) to verify that voltage is present. If the voltage is ok, try replacing the

AC adapter.

♦Check to see that the battery packs are installed correctly and that the

battery charge indicators on the front of the battery packs indicate the

batteries are charged (try using a new battery pack if batteries are

discharged).

♦If the AC outlet voltage, AC adapter, and battery packs test normal but the

computer will not power up, try disconnecting the display cable from the

base (refer to Section 6 for disassembly instructions) to see if a short in the

display assembly has occurred.

♦If the display assembly appears to be normal, replace the Bottom Board as

described in Section 6 and retest system.

5.3.2 T roubleshooting a Display Problem

If the LCD remains blank when you turn on the computer, and the status indicators

Contents

Main Page Preface Introduction Intended Audience Contents Page Contents Preface Section 1 General Description Section 2 Installation Section 2 Installation (continued) Section 3 Operating Instructions Section 4 Theory of Operation Section 5 Troubleshooting Procedures Section 5 Troubleshooting Procedures (continued) Section 6 Field Service Section 6 Field Service (continued) Appendix A Model 60x Maintenance Data Appendix B Model 65x Maintenance Data 1 General Description 1.1 Introduction 1.2 Product Overview 1.2.1 Notebook Model Summary Table 1-2 contains a summary of the available models in the 60x and 65x Series. * Standard Module Bay 1.2.2 Extensa 60x Series 1.2.3 Extensa 65x Series Notebooks Page 1.2.4 Video Display Features 1.2.4.1 Internal LCD Touchpad Pointing Device 1.2.5 Software Features Operating System Description 1.2.6 60x Series External Ports PS/2 Port 1.2.7 65x Series External Ports 1.2.8 Standard Peripheral Devices 1.2.9 Expansion Capabilities 1.2.10 PCMCIA Card Options Expansion Feature Description 1.3 Standard Test Features 1.3.1 Power On Self Test 1.3.2 PC-Doctor Diagnostics Program 1.4 International Product Models Configuration Dash No. 1-16 General Description 1.5 Extensa 60x and 65x Series Specifications General specifications for the Extensa 60x and 65x Series Notebooks are provided in Table 1-8. Flash ROM: 655CD Model 650CD Model FDD Disk Storage Capacity Disk Size Drive Height Mode CD-ROM Drive LCD Display Video Subsystem Characteristic Model 655CD Model 650CD Model 605CD Model External CRT Monitor Interface Connector Type Monitors Supported Characteristic Model 655CD Model 650CD Model 1-20 General Description RS-232-D Serial Port Method Bits per second: Transmit Receive: Data word: 16550 UART Support Selectable Serial Port (BIOS Setup) Parallel Port Connector Type FDD Support Selectable Parallel Port (BIOS Setup) Serial I/R Port Transfer Data Rate Transfer Distance Standard Characteristic Model 1.6 Regulatory Agency Approvals 2 Installation 2.1 Introduction 2.2 Unpacking Instructions 2.3 Installing Internal Notebook Options 2.3.1 Installing Main Memory Expansion (Optional) 2.3.2 Setting up the Software 2.4 Installing External Options 2.4.1 Installing PCMCIA Options Page Page 2.5.2 Installing an External Parallel Printer or Floppy Drive 60X Series Notebook k PARALLEL PORT PINOUTS PLP122 2.5.3 Installing an External Serial Port Device 2.5.4 Installing an External VGA Monitor 2.5.5 Installing the Security Lock Option 2.6 Battery Pack Installation 2.7 Installing the AC Power Adapter DC-IN AC Adapter 2.8 Initial System Checkout AC Power (120VAC to 230 VAC, 50 to 60 Hz) Page 3 Operating Instructions 3.1 Introduction 3.2 Controls/Indicators 3.2.1 Power On/Off Switch 3.2.2 Notebook LEDs 3.2.2.1 Hot Key Sequences Function Key Sequence Page Theory of Operation 4.1 Introduction 4.2 Notebook Functional Overview 4.2.1 System Processor 586 M1521 M1523 4.2.2 Memory Subsystem 4.2.2.1 Main Memory 4.2.2.2 Flash ROM 4.2.3 V ideo Subsystem 4.2.4 Sound Subsystem 4.2.5 Keyboard Subsystem 4.2.6 Hard Disk Drive Subsystem 4.2.6.1 Hard Disk Drive Power Management 4.3 Detailed Circuit Theory 4-6 Theory of Operation 4.3.1 Major Components Component Table 4-1 shows a listing the of the major components used in the Extensa Series Notebooks. 4.3.2 System Architecture Table 4-1 Major Chips List SYSTEM ARCHITECTURE XD - TTL GC ISA addr ALI M1521 (PCI, Cache, and Memory Controller) Page 4-10 Theory of Operation 4.3.2.1 ALI M1523 (PCI-ISA Bridge) Figure 4-4 M1523 Chip Simplified Block Diagram M1523 Block Diagram 4-12 Theory of Operation Figure 4-5 M1523 Pinouts ALi M1523 Page Page Page 4.3.2.4 C&T 65550 High Performance Flat Panel / CRT VGA Controller Page 4.3.2.5 TI1130 PCMCIA Controller Page 4-20 Theory of Operation 4.3.2.6 NS87336VJG Super I/O Controller 4-22 Theory of Operation A simplified block diagram of the Super I/O controller is provided in Figure 4-10. Figure 4-10 Super I/O Controller Block Diagram 4.3.2.6 ESS1688 Audio Controller Page 5 Troubleshooting Procedures 5.1 Introduction 5.2 Overview of Fault Isolation Process 5-2 Troubleshooting Procedures Figure 5-1 Notebook Computer Troubleshooting Flow Chart See Paragraphs 5.3.3.1 and 5.3.3.2 See Paragraph 5.4 5.3 Troubleshooting Procedures 5.3.1 T roubleshooting a Power Supply Problem 5.3.2 T roubleshooting a Display Problem Cable Mother Panel Display Problem Description Inverter Board LCD Board BIOS 5.3.3 Fault Isolation Using Self Test 5.3.3.1 Self Test Error Messages Page Page 5.3.3.2 Self Test Beep Error Messages Page 5.3.4 PCMCIA Modem Problems 5.4 Fault Isolation Using Diagnostics 5.4.1 PC-Doctor (In DOS Mode or DOS W indow) 5.4.2 Supporting Online Documentation 5.4.3 User Inter face to PC-Doctor 5.4.4 Quitting PC-Doctor Page 6 Field Service 6.1 Introduction 6.2 Preventive Maintenance 6.2.1 Cleaning the Computer 6.2.2 Handling the Computer 6.2.3 Handling the Computer Battery Pack 6.2.4 Password Caution 6.3 Required Tools and Equipment 6.4 Notebook FRUs 6.5 FRU Removal/Replacement Procedures 6.5.1 Removing/Replacing the Notebook Battery Pack Unplugging the Cable Connecting the Cable Page 6.5.2 Removing/Replacing PCMCIA Options Page Reference View Removing the HDD 6.5.4 Removing/Replacing the Keyboard Assembly 6.5.5 Removing/Replacing Expansion Memory Removing Keyboard J0102 J0103 J0104 Page 6.5.6 Removing the Heat Sink Assembly 6.5.7 Removing/Replacing the CPU Chip 6.5.8 FDD/CD-ROM Drive Removal 6.5.8.1 60x Series Drive 6.5.8.2 Removing/Replacing 65x Series Module 6.5.9 Removing/Replacing the Display Assembly 6.5.10 Removing/Replacing the Top Cover 6.5.11 Removing/Replacing the Fan Assembly 6.5.11.1 (60x Series) 6.5.11.2 Removing Fan Assembly (65x Series) 6.5.12 Removing/Replacing the LED Board (65x Series) 6.5.13 Removing/Replacing the Battery Board (65x Series) 6.5.14 Removing/Replacing Inside Frame Assy. (60x Series) 6.5.15 Removing/Replacing Inside Frame Assy (65x Series) 6.5.16 Removing/Replacing the Power Supply Board 6.5.17 Removing/Replacing the Motherboard Assembly 6.5.17.1 60x Series Motherboard Assembly J21 J12 J13 J14 Page 6.5.18 Removing/Replacing FIR/Audio Board (65x Series) Page Page 6.5.19 Removing/Replacing the VGA Video Board (60X Only) 6.5.20 Removing/Replacing the PCMCIA Connector Module 6.5.21 Removing/Replacing the Touchpad Assembly 6.5.22 Removing/Replacing the Display Bezel Page 6.5.23 Removing/Replacing the Display Inverter Boards 6.5.24 Removing/Replacing the LCD Panel Page A Model 60x Maintenance Data A.1 Introduction A.2 Model 60x Features Summary A.3 Field-Replaceable Units (FRUs) Page Display Assembly Shown with Bezel Removed A.3.2 System Base Assembly Bottom of Unit Page Page A.4 Logic Diagrams Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page B Model 65x Maintenance Data B.1 Introduction B.2 Model 65x Features Summary B.3 Field-Replaceable Units (FRUs) Page Display Assembly Shown with Bezel Removed Page B.3.2 System Base Assembly Page Page B.4 65x Logic Diagrams Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Figure 1-16 Main Board Jumpers and Connectors (Bottom Side)