Toshiba qosmio g20 Service Manual

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Toshiba Personal Computer

QOSMIO G20

Maintenance Manual

TOSHIBA CORPORATION

File Number 960-511

[CONFIDENTIAL]

© 2005 by Toshiba Corporation. All rights reserved. Under the copyright laws, this manual cannot be reproduced in any form without the prior written permission of Toshiba. No patent liability is assumed with respect to the use of the information contained herein.

Toshiba QOSMIO G20 Maintenance Manual

First edition February 2005

Disclaimer

The information presented in this manual has been reviewed and validated for accuracy. The included set of instructions and descriptions are accurate for the QOSMIO G20 at the time of this manual's production. However, succeeding computers and manuals are subject to change without notice. Therefore, Toshiba assumes no liability for damages incurred directly or indirectly from errors, omissions, or discrepancies between any succeeding product and this manual.

Trademarks

IBM is a registered trademark and IBM PC is a trademark of International Business Machines Corporation. Intel, Intel SpeedStep, Centrino, Pentium are trademarks or registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries/regions. Windows and Microsoft are either registered trademarks of Microsoft Corporation. Bluetooth is a trademark owned by its proprietor and used by TOSHIBA under license. Memory Stick id a registered trademark and i.LINK is a trademark of Sony Corporation. Other trademarks and registered trademarks not listed above may be used in this manual.

ii [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

Preface

This maintenance manual describes how to perform hardware service maintenance for the Toshiba Personal Computer QOSMIO G20.

NOTE: Each model of QOSMIO G20 has a different configuration. For each model’s

configuration, refer to the parts list dedicated to it.

The procedures described in this manual are intended to help service technicians isolate faulty Field Replaceable Units (FRUs) and replace them in the field.

SAFETY PRECAUTIONS

Four types of messages are used in this manual to bring important information to your attention. Each of these messages will be italicized and identified as shown below.

DANGER: “Danger” indicates the existence of a hazard that could result in death or

serious bodily injury, if the safety instruction is not observed.

WARNING: “Warning” indicates the existence of a hazard that could result in bodily

injury, if the safety instruction is not observed.

CAUTION: “Caution” indicates the existence of a hazard that could result in property

damage, if the safety instruction is not observed.

NOTE: “Note” contains general information that relates to your safe maintenance

service.

Improper repair of the computer may result in safety hazards. Toshiba requires service technicians and authorized dealers or service providers to ensure the following safety precautions are adhered to strictly.

 Be sure to fasten screws securely with the right screwdriver. Be sure to use the PH

Point size “0” and “1” screwdrivers complying with the ISO/DIS 8764-1:1996. If a screw is not fully fastened, it could come loose, creating a danger of a short circuit, which could cause overheating, smoke or fire.

 If you replace the battery pack or RTC battery, be sure to use only the same model

battery or an equivalent battery recommended by Toshiba. Installation of the wrong battery can cause the battery to explode.

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] iii

The manual is divided into the following parts:

Chapter 1 Hardware Overview describes the QOSMIO G20 system unit and each

FRU.

Chapter 2 Troubleshooting Procedures explains how to diagnose and resolve

FRU problems.

Chapter 3 Test and Diagnostics describes how to perform test and diagnostic

operations for maintenance service.

Chapter 4 Replacement Procedures describes the removal and replacement of the

FRUs.

Appendices The appendices describe the following:

❑ Handling the LCD module ❑ Board layout ❑ Pin assignment ❑ Display codes ❑ Key layout ❑ Wiring diagrams ❑ BIOS Rewrite procedures ❑ EC/KBC Rewrite procedures ❑ Reliability ❑ Maintenance of TOSHIBA RAID

iv [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

Conventions

This manual uses the following formats to describe, identify, and highlight terms and operating procedures.

Acronyms

On the first appearance and whenever necessary for clarification acronyms are enclosed in parentheses following their definition. For example:

Read Only Memory (ROM)

Keys

Keys are used in the text to describe many operations. The key top symbol as it appears on the keyboard is printed in boldface type.

Key operation

Some operations require you to simultaneously use two or more keys. We identify such

operations by the key top symbols separated by a plus (+) sign. For example, Ctrl + Pause (Break) means you must hold down Ctrl and at the same time press Pause (Break). If

three keys are used, hold down the first two and at the same time press the third.

User input

Text that you are instructed to type in is shown in the boldface type below:

DISKCOPY A: B:

The display

Text generated by the QOSMIO G20 that appear on its display is presented in the type face below:

Format complete System transferred

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] v

Chapter 1 Hardware Overview

1.1 Features ...................................................................................................................... 1-1

1.2 System Block Diagram .............................................................................................. 1-5

1.3 2.5-inch Hard Disk Drive......................................................................................... 1-10

1.4 Optical Drive............................................................................................................ 1-15

1.5 Keyboard.................................................................................................................. 1-14

1.6 TFT Color Display................................................................................................... 1-15

1.7 Power Supply ........................................................................................................... 1-17

1.8 Batteries ................................................................................................................... 1-20

1.9 AC Adapter .............................................................................................................. 1-23

Chapter 2 Troubleshooting Procedures

2.1 Troubleshooting ......................................................................................................... 2-1

2.2 Troubleshooting Flowchart........................................................................................ 2-3

2.3 Power Supply Troubleshooting.................................................................................. 2-7

2.4 System Board Troubleshooting................................................................................ 2-17

2.5 USB FDD Troubleshooting .....................................................................................2-37

2.6 2.5” HDD Troubleshooting...................................................................................... 2-41

2.7 Keyboard Troubleshooting ......................................................................................2-46

2.8 Touch pad Troubleshooting ..................................................................................... 2-48

2.9 Display Troubleshooting.......................................................................................... 2-50

2.10 Optical Disk Drive Troubleshooting........................................................................ 2-53

2.11 Modem Troubleshooting.......................................................................................... 2-55

2.12 LAN Troubleshooting.............................................................................................. 2-57

2.13 Wireless LAN Troubleshooting............................................................................... 2-58

2.14 Bluetooth Troubleshooting ...................................................................................... 2-61

2.15 Sound Troubleshooting............................................................................................ 2-64

2.16 TV Tuner Troubleshooting ...................................................................................... 2-66

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2.17 Bridge media Slot Troubleshooting......................................................................... 2-67

2.18 PCI ExpressCard Slot Troubleshooting................................................................... 2-68

Chapter 3 Tests and Diagnostics

3.1 The Diagnostic Test ................................................................................................... 3-1

3.2 Executing the Diagnostic Test ................................................................................... 3-4

3.3 Check of the RAID configuration.............................................................................. 3-8

3.4 Setting of the hardware configuration...................................................................... 3-16

3.5 Heatrun Test............................................................................................................. 3-19

3.6 Subtest Names.......................................................................................................... 3-20

3.7 System Test.............................................................................................................. 3-22

3.8 Memory Test............................................................................................................ 3-24

3.9 Keyboard Test.......................................................................................................... 3-25

3.10 Display Test ............................................................................................................. 3-26

3.11 Floppy Disk Test...................................................................................................... 3-29

3.12 Printer Test............................................................................................................... 3-31

3.13 Async Test ............................................................................................................... 3-33

3.14 Hard Disk Test ......................................................................................................... 3-34

3.15 Real Timer Test........................................................................................................ 3-37

3.16 NDP Test.................................................................................................................. 3-39

3.17 Expansion Test......................................................................................................... 3-40

3.18 CD-ROM/DVD-ROM Test ..................................................................................... 3-42

3.19 Error Code and Error Status Names......................................................................... 3-43

3.20 Hard Disk Test Detail Status.................................................................................... 3-46

3.21 ONLY ONE TEST................................................................................................... 3-48

3.22 Head Cleaning.......................................................................................................... 3-58

3.23 Log Utilities ............................................................................................................. 3-59

3.24 Running Test............................................................................................................ 3-61

3.25 Floppy Disk Drive Utilities...................................................................................... 3-62

3.26 System Configuration .............................................................................................. 3-67

3.27 Wireless LAN Test Program (Intel-made b/g)......................................................... 3-69

3.28 Wireless LAN Test Program (Intel-made a/b/g)...................................................... 3-73

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3.29 Wireless LAN Test Program (Askey-made)............................................................ 3-78

3.30 LAN/Modem/Bluetooth/IEEE1394 Test Program .................................................. 3-82

3.31 Sound Test program................................................................................................. 3-96

3.32 SETUP ................................................................................................................... 3-102

Chapter 4 Replacement Procedures

4.1 Overview....................................................................................................................4-1

4.2 Battery pack ............................................................................................................... 4-8

4.3 ExpressCard & PC card / Bridge media .................................................................. 4-10

4.4 HDD......................................................................................................................... 4-13

4.5 MDC ........................................................................................................................ 4-17

4.6 Memory module....................................................................................................... 4-19

4.7 Keyboard.................................................................................................................. 4-21

4.8 Bottom cover assembly............................................................................................ 4-24

4.9 LAN jack.................................................................................................................. 4-29

4.10 Speaker (L) & Modem jack ..................................................................................... 4-30

4.11 AV-IN board ............................................................................................................ 4-32

4.12 Battery latch assembly ............................................................................................. 4-33

4.13 Optical disk drive..................................................................................................... 4-35

4.14 SJ board / Internal Microphone................................................................................ 4-39

4.15 Sound board ............................................................................................................. 4-42

4.16 Power SW board ...................................................................................................... 4-44

4.17 Battery board / RTC battery..................................................................................... 4-46

4.18 Wireless LAN card ..................................................................................................4-49

4.19 TV tuner module...................................................................................................... 4-50

4.20 CPU fan.................................................................................................................... 4-52

4.21 CPU fin & CPU .......................................................................................................4-53

4.22 VGA fan & VGA fin................................................................................................ 4-56

4.23 GMCH heat sink ...................................................................................................... 4-58

4.24 Speaker (R) .............................................................................................................. 4-59

4.25 TV antenna board..................................................................................................... 4-60

4.26 System board............................................................................................................ 4-61

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4.27 PC card slot.............................................................................................................. 4-63

4.28 Bluetooth module..................................................................................................... 4-65

4.29 Volume sensor board ............................................................................................... 4-67

4.30 Touch sensor board.................................................................................................. 4-68

4.31 Touch pad................................................................................................................. 4-70

4.32 Latch assembly......................................................................................................... 4-72

4.33 LCD unit / FL inverter ............................................................................................. 4-74

4.34 LCD harness............................................................................................................. 4-79

4.35 Wireless antennas..................................................................................................... 4-82

4.36 Display latch hook ................................................................................................... 4-85

4.37 Display rear cover.................................................................................................... 4-86

4.38 Hinge........................................................................................................................ 4-87

4.39 Fluorescent lamp...................................................................................................... 4-89

Appendices

Appendix A Handling the LCD Module ........................................................................ A-1

Appendix B Board Layout ............................................................................................. B-1

Appendix C Pin Assignment .......................................................................................... C-1

Appendix D Display Codes............................................................................................ D-1

Appendix E Key Layout..................................................................................................E-1

Appendix F Wiring Diagrams......................................................................................... F-1

Appendix G BIOS Rewite procedures............................................................................ G-1

Appendix H EC/KBC Rewrite procedures..................................................................... H-1

Appendix I Reliability.....................................................................................................I-1

Appendix J Maintenance of TOSHIBA RAID ...............................................................J-1

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x [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

Chapter 1

Hardware Overview

[CONFIDENTIAL]

1 Hardware Overview

1-ii [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

Chapter 1 Contents

1.1 Features...................................................................................................................... 1-1

1.2 System Block Diagram .............................................................................................. 1-5

1.3 2.5-inch Hard Disk Drive......................................................................................... 1-10

1.4 Optical Drive............................................................................................................ 1-15

1.4.1 DVD Super Multi Drive (supporting Double-Layer)......................... 1-12

1.5 Keyboard.................................................................................................................. 1-14

1.6 TFT Color Display................................................................................................... 1-15

1.6.1 LCD Module ...................................................................................... 1-15

1.6.2 FL Inverter Board............................................................................... 1-16

1.7 Power Supply........................................................................................................... 1-17

1.8 Batteries ................................................................................................................... 1-20

1.8.1 Main Battery....................................................................................... 1-20

1.8.2 Battery Charging Control ................................................................... 1-21

1.8.3 RTC battery ........................................................................................ 1-22

1.9 AC Adapter .............................................................................................................. 1-23

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 1-iii

Figures

Figure 1-1 Front of the computer and the system units configuration ............................ 1-4

Figure 1-2 System block diagram.................................................................................... 1-5

Figure 1-3 2.5-inch HDD............................................................................................... 1-10

Figure 1-4 DVD Super Muti drive (Double-Layer) ...................................................... 1-12

Figure 1-5 Keyboard...................................................................................................... 1-14

Figure 1-6 LCD module................................................................................................. 1-15

Tables

Table 1-1 2.5-inch HDD dimensions ...........................................................................1-10

Table 1-2 2.5-inch HDD specifications........................................................................ 1-11

Table 1-3 DVD Super Multi drive (Double-Layer) outline dimensions...................... 1-12

Table 1-4 DVD Super Multi drive (Double-Layer) specifications .............................. 1-13

Table 1-5 LCD module specifications.......................................................................... 1-15

Table 1-6 FL inverter board specifications .................................................................. 1-16

Table 1-7 Power supply output rating .......................................................................... 1-18

Table 1-8 Battery specifications................................................................................... 1-20

Table 1-9 Time required for charges of main battery .................................................. 1-21

Table 1-10 Data preservation time ................................................................................. 1-21

Table 1-11 Time required for charges of RTC battery................................................... 1-22

Table 1-12 AC adapter specifications ............................................................................ 1-23

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1 Hardware Overview 1.1 Features

1 Features

1.1 Features

The QOSMIO G20 series are high performance all-in-one PCs running a Pentium-M processor.

The features are listed below.

❑ Microprocessor

Microprocessor that is used will be different of the model.

Intel

Mobile Pentium ®-M

Pentium-M 1.60GHz (Processor Number : 730)

1.73GHz (Processor Number : 740)

1.86GHz (Processor Number : 750)

2.00GHz (Processor Number : 760)

2.13GHz (Processor Number : 770)

L1 cache : 64KB (32KB + 32KB) L2 cache : 2MB

❑ Memory

Two DDR2-SDRAM slots. Memory modules can be installed to provide a maximum of 2GB. Memory modules are available in 256MB, 512MB and 1024MB sizes.

❑ VGA

nVIDIA NV43M is mounted.

❑ HDD

Double (or single) 60GB 80GB or 100GB internal serial-ATA drive. 2.5 inch x

9.5mm height.

❑ Optical devices

A slot-loading style DVD Super Multi drive (supporting double layer) is equipped.

❑ Keyboard

An-easy-to-use 85(US)/86(UK)-key keyboard provides a numeric keypad overlay for fast numeric data entry or for cursor and page control. The keyboard also includes two keys that have special functions in Microsoft Windows XP. It supports software that uses a 101- or 102-key enhanced keyboard.

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1.1 Features 1 Hardware Overview

❑ Display

LCD

Built-in 17.0-inch, WXGA+ (1,440 x 900 dots) amorphous silicon TFT color display.

Interface

To external monitor via - RGB connector

- S-video OUT connector

- D-port OUT connector

To internal monitor via - S-video IN connector

- Monitor IN port

❑ Sound system

Harman/Kardon-made stereo speaker is equipped. An internal microphone, external monaural microphone connector, stereo headphone connector is also equipped.

❑ Battery

The RTC battery is equipped inside the computer. The main battery is a detachable lithium ion battery (4,400mAh:Li-Ion, 6cell).

❑ TV-tuner (Mini PCI slot)

This enables to watch TV and record it. (Supporting world wide signal : NTSC, PAL and SECAM).

❑ Wireless LAN (Mini PCI slot)

The wireless LAN is equipped on the mini PCI slot.

❑ LAN/MODEM

Connectors for LAN and Modem are separately mounted.

❑ Bluetooth

Depending on the model, the computer is equipped with a dedicated Bluetooth module. This enables a communication to devices that support Bluetooth Version 1.2/1.1/. Adopting AFH (Adaptive Frequency Hopping), reduce the interference with the wireless communication in 2.4GHz. It can be switched on or off with a switch on the computer.

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1 Hardware Overview 1.1 Features

❑ Remote controller

A remote controller for easy operation from some distance.

❑ USB FDD

USB FDD supports 720KB and 1.44MB.

❑ PC card slot

The PC card slot (PCMCIA) accommodates one 5mm Type II card. (Based on PC Card Standard, supporting CardBus)

❑ ExpressCard slot

The ExpressCard slot accommodates an ExpressCard.

❑ USB (Universal Serial Bus)

Four USB ports are provided. The ports comply with the USB2.0 standard, which enables data transfer speeds 40 times faster than USB1.1 standard. USB1.1 is also supported.

❑ Bridge Media slot

One SD memory card/ SDIO card/Memory stick (PRO)/xDPicture card/MultiMedia card slot. Data can be read and written by inserting each media to the slot.

❑ IEEE1394 port

The computer has one IEEE 1394 port. It enables high-speed data transfer directly from external devices such as digital video cameras.

❑ S/PDIF

This port can send or receive the digital sound data with the equipment like CD, MD Player. (This port is also used for headphone I/F.)

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 1-3

1.1 Features 1 Hardware Overview

Figure 1-1 shows the front of the computer and the system units configuration.

Figure 1-1 Front of the computer and the system units configuration

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1 Hardware Overview 1.2 System Block Diagram

1.2 System Block Diagram

Figure 1-2 shows the system block diagram.

Figure 1-2 System block diagram

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 1-5

1.2 System Block Diagram 1 Hardware Overview

The PC contains the following components.

❑ CPU

Intel ® Mobile Pentium ®-M

Pentium-M 1.60GHz (Processor Number ; 730)

1.73GHz (Processor Number ; 740)

1.86GHz (Processor Number ; 750)

2.00GHz (Processor Number ; 760)

2.13GHz (Processor Number ; 770)

L1 cache : 64KB (32KB + 32KB) L2 cache : 2MB FSB : 533MHz Core voltage : 1.340~0.748V

❑ Memory

Two memory slots capable of accepting DDR2-SDRAM 256MB, 512MB or 1024MB memory modules for a maximum of 2GB.

- 200-pin small-size DIMM

- 2.5V operation

- PC3200(DDR2-400)/PC4300(DDR2-533) support

❑ BIOS ROM (Flash memory)

- 8Mbit (512K×16-bit chip)

64KB used for logo/icon 224KB used for system BIOS 64KB used for VGA-BIOS 60KB used for Intel PXE 32KB used for ACPI 16KB used for MBI 17KB used for booting 16KB used for Parameter Block 19KB are reserved

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1 Hardware Overview 1.2 System Block Diagram

❑ Chipset

This gate array has the following elements and functions.

¾ North Bridge (Intel 915PM <Express Chipset>)

- Support Dothan Processor System Bus

- System Memory Interface

- Memory Controller : DDR333/DDR2-400/DDR2-533, 2GB(max)

- Graphics I/F : x16 PCI Express Based Graphics I/F

- DMI (Direct Media Interface)

- 1,257-ball 40.0mmx37.5mmx2.6mm FC-BGA Package

¾ South Bridge (Intel 82801DBM (ICH6-M))

- DMI (Direct Media Interface)

- PCI Express I/F (4 ports)

- PCI Bus I/F Rev 2.3 (PCI REQ/GNT Pairs)

- Integrated Serial ATA Host Controller (2 ports, 150MB/S)

- Integrated IDE Controller (Ultra ATA 100/66/33)

- AC’97 2.3 codes

- USB 1.1/2.0 Controller 8 ports (EHCI: Enhanced Host Controller Interface)

- Built-in LAN Controller (Wfm 2.0& IEEE802.3 compliance)

- Power Management (ACPI 2.0 compliance)

- SMBus2.0 controller

- FWH interface (BIOS)

- LPC interface (EC/KBC, Super I/O)

- IRQ controller

- Serial Interrupt Function

- Suspend/Resume control

- Built-in RTC

- GPIO

- 609-ball 31mmx31mm micro BGA Package

❑ PC card controller (PCI7411, Texas Instrument-made)

- PCI Interface (PCI Rev. 2.3)

- PC Card Controller

- IEEE1394 Controller

- Flash Media Controller

- SD Host Controller

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 1-7

1.2 System Block Diagram 1 Hardware Overview

❑ Super I/O (SMSC-made LPC47N217)

Two serial ports (NS16C550 compatible)

- One port is used as Debug port

❑ VGA controller

nVIDIA NV43m

- Built-in VRAM 64MB/128MB

- PCI Express Interface

- LCD Interface LVDS 2ch

- Supports TV Encoder, S-Video

❑ Mini PCI

Wireless LAN card

2.4GHz DSSS/OFDM, 5.0GHz OFDM wireless LAN card is equipped. Conformity with IEEE 802.11b/g or IEEE 802a/b/g. Transfer speed is maximum of 11Mbit/sec. Supports 128bit WEP.

TV tuner

Some signals (NTSC, PAL and SECAM) are supported for worldwide use and MPEG2 hardware encoding function are also supported.

 LAN controller (ICH4-M Kinnerth 82562EP)

Controls LAN and supports 100BASE-TX (Fast Ethernet)/10BASE-T (Ethernet).

 Other main system chips

¾ PSC (Toshiba-made TMP87PM48U x 1) ¾ Clock Generator (ICS-made 954204BGFT x 1) ¾ EC/KBC (Renesas-made M306KA x 1) ¾ FWH (ST-Micro-made M50FW080N1 x 1) ¾ AC97-CODEC (ADI-made AD1981 x 1) ¾ Audio AMP (Matsushita-made AN12941A-VF x1) ¾ SVP EX (Trident-made 7052-LF x 1)

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1 Hardware Overview 1.2 System Block Diagram

❑ MODEM (Askey-made 1456VQL4 x 1)

Supported by MDC. Uses secondary AC97 line. Data and FAX transmission is available. Supports ITU-TV.90. The transfer speed of data receiving is 56kbps, of data sending is 33.6kbps and of FAX is 14.4kbps. Actual speed depends on the quality of the line used. Connected to telephone line through RJ11 MODEM jack.

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1.3 2.5-inch Hard Disk Drive 1 Hardware Overview

1.3 2.5-inch Hard Disk Drive

A compact, high-capacity Serial-ATA HDD with a height of 9.5mm. Contains a 2.5-inch magnetic disk and magnetic heads.

Figure 1-3 shows a view of the 2.5-inch HDD and Tables 1-1 and 1-2 list the specifications.

Figure 1-3 2.5-inch HDD

Outline

dimensions

Parameter

Width (mm)

Height (mm)

Depth (mm)

Weight (g)

Table 1-1 2.5-inch HDD dimensions

Standard value

FUJITSU

G8BC0001R610

70.0 -

9.5 -

100.0 -

99 (max) -

FUJITSU

G8BC0001R810

TOSHIBA

HDD2D30BZK01

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1 Hardware Overview 1.3 2.5-inch Hard Disk Drive

Table 1-2 2.5-inch HDD Specifications

Specification

Parameter

Storage size (formatted) 60GB 80GB

Speed (RPM) 5,400

Positioning time

Data transfer speed

Data Buffer size

Power-on-to-ready (sec) 4

Minimum

Average

Maximum

To/From Media

To/From Host

FUJITSU

G8BC0001R610

1.5 ms

12 ms (read)

22 ms

53.9 MB/s (max)

1.5GB/s (max)

8MB

FUJITSU

G8BC0001R610

Specification

Parameter

Storage size (formatted) 100GB

Speed (RPM) 5,400

TOSHIBA

HDD2D30BZK01

Positioning time

Data transfer speed

Data Buffer size

Power-on-to-ready (sec) -

Minimum

Average

Maximum

To/From Media

To/From Host

- ms

- ms (read)

- ms

- MB/s (max)

-GB/s (max)

-MB

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1.4 Optical Drive 1 Hardware Overview

1.4 Optical Drive

1.4.1 DVD Super Multi Drive (supporting Double-Layer)

The DVD Super Multi drive (supporting Double Layer) accommodates 12 cm (4.72-inch) CD/DVD-ROM, CD-R/RW, DVD±R/±RW and DVD-RAM. It is a high-performance drive that reads DVD-ROM at maximum 8-speed and CD-ROM at maximum 24-speed. It writes CD-R at maximum 24-speed, CD-RW at maximum 10-speed, DVD±R at maximum 8-speed, DVD±RW at maximum 4-speed, DVD-RAM at maximum 5-speed and DVD+R (Double Layer) at maximum 2.4-speeed.

The DVD Super Multi drive is shown in Figure 1-6. The dimensions and specifications of the DVD Super Multi drive are described in Table 1-7, Table 1-8.

Table 1-3 DVD Super Multi drive (Double-Layer) outline dimensions

Outline dimensions (excluding projections)

Figure 1-4 DVD Super Multi drive (Double-Layer)

Parameter Standard value

Maker

Width (mm) 128

Height (mm) 12.7

Depth (mm) 129.0

Mass (g) 179 (±15)

MATSUSHITA-KOTOBUKI

(G8CC0002CZ10)

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1 Hardware Overview 1.4 Optical Drive

Table 1-4 DVD Super Multi drive (Double-Layer) specifications

Parameter

Data transfer

speed

Access time

(ms)

Buffer memory 2MB

Drive Specification

MATSUSHITA-KOTOBUKI (G8CC0002CZ10)

Read(KB/s)

Write

(Maximum)

ATAPI interface

(MB/s)

CD-ROM 150 (Random)

DVD-ROM 180 (Random)

PIO mode 16.6 MB/s (PIO MODE4 supported)

DMA mode 16.6 MB/s (Multi-word MODE2 supported)

Ultra DMA mode 33.3 MB/s(Ultra DMA MODE2 supported)

DVD-ROM MAX 8X CAV CD-ROM MAX 24X CAV

CD-R 24x (Zone CLV)

CD-RW 4X (CLV) High Speed CD-RW 10X (CLV) Ultra Speed CD-RW 10X (CLV)

DVD-R 8x (Zone CLV)

DVD-RW 4x (Zone CLV)

DVD+R 8x (Zone CLV)

DVD+R Double Layer 2.4x (CLV)

DVD+RW 4x (Zone CLV)

DVD-RAM 5x (ZCLV) (4.7GB)

Supported disk format

DVD

CD-DA, CD-ROM, CD-ROM XA,

Photo CD, CD-Extra(CD+), CD-text

DVD-R, DVD-RW (Ver1.1) DVD+R/+RW, DVD Video,

DVD-RAM (2.6GB/4.7GB)

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1.5 Keyboard 1 Hardware Overview

1.5 Keyboard

A keyboard which consists of 85(US)/86(UK) keys is mounted on the system unit. The keyboard is connected to membrane connector on the system board and controlled by the keyboard controller.

Figure 1-7 is a view of the keyboard.

Figure 1-5 Keyboard

See Appendix E for details of the keyboard layout.

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1 Hardware Overview 1.6 TFT Color Display

1.6 TFT Color Display

The TFT color display is 17.1 inch and consists of LCD module and FL inverter board.

1.6.1 LCD Module

The LCD module used for the TFT color display uses a backlight as the light source and can display a maximum of 320,000 colors with 1,440 x 900 resolution.

Figure 1-8 shows a view of the LCD module and Table 1-9 lists the specifications.

Figure 1-6 LCD module

Table 1-5 LCD module specifications

Specifications

Item

Number of Dots

Dot spacing (mm) 0.255 (H) x 0.255 (V)

Display range (mm) 367.2 (W) x 229.5 (H)

Outline dimensions 382.2 (w) x 246.8 (H) x 10.0(max) (D)

LG-Philips

(G33C0002K110)

1,440(W) × 900(H)

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 1-15

1.6 TFT Color Display 1 Hardware Overview

1.6.2 FL Inverter Board

The FL inverter board supplies a high frequency current to illuminate the LCD module FL.

Table 1-10 lists the FL inverter board specifications.

Table 1-6 FL inverter board specifications

Specifications

G71C0004F310

(x 2 output ; MAX 13W)

7 (rms)

(x 2 output)

Output

Item

Voltage (V) 5 (DC) Input

Power (W) 18

Voltage (V) 900 (rms)

Power (W/VA) 7W / 10VA

Current

(f=70KHz)(mA)

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1 Hardware Overview 1.7 Power Supply

1.7 Power Supply

The power supply supplies 28 different voltages to the system board.

The power supply microcontroller has the following functions.

1. Judges if the DC power supply (AC adapter) is connected to the computer.

2. Detects DC output and circuit malfunctions.

3. Controls the battery icon, and DC IN icon.

4. Turns the battery charging system on and off and detects a fully charged battery.

5. Turns the power supply on and off.

6. Provides more accurate detection of a low battery.

7. Calculates the remaining battery capacity.

8. Controls the transmission of the status signal of the main battery.

Table 1-11 lists the power supply output specifications.

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 1-17

1.7 Power Supply 1 Hardware Overview

Table 1-7 Power supply output rating (1/2)

Power supply （Yes/No）

Name

Voltage

[V]

Power OFF

(Suspend mode)

Power OFF

(Boot mode)

Battery

Object

PPV

1.308 -

0.748

No No No CPU

PTV 1.05 No No No CPU, MCH, ICH6-M

PGV 1.056 No No No GPU

1R5-P1V 1.5 No No No CPU, MCH, ICH6-M, Express card

1R8-B1V 1.8

2R5-P2V 2.5 No No No

MR0R9-B0V 0.9

Yes

No No MCH, DDR2-SDRAM, GPU

MCH, ICH6-M, GPU,

SVP EX, LVDS

No No MCH, DDR2-SDRAM

G0R9-P0V 0.9 No No No GPU

0R9-P0V 0.9 No No No DDR2-SDRAM

1R5-S1V 1.5

Yes Yes

No ICH6-M

Clock Generator,

Thermal Sensor, SDRAM(SPD),

SDRAM(SPD), ICH6-M, LAN,

P3V 3.3 No No No

Super I/O, PC Card Cont., Mini-

PCI, WW-Tuner, Express card,

FWH, AD1981B, EC/KBC, GPU,

SVP EX, TMDS, LCD,

HDD (SATA)

E3V 3.3

Yes Yes / No

Card Cont., PC card power, Mini

PCI, Express card, MDC

FM-E3V 3.3 No No No Media Bridge

BT-P3V 3.3 No No No Bluetooth

USB0PS-E5V 5

USB1PS-E5V 5

S3V 3.3

Yes Yes / No

Yes Yes

No USB

No ICH6-M, EC/KBC, PSC, IR Cont.

CRT, ICH6-M, FL inverter, LEDs,

P5V 5 No No No

HDD (SATA), ODD, KB,

PAD, Bluetooth power

ICH-S5V 5

ICH-S3V 3.3

ICH1R5-S1V 1.5

Yes Yes

No ICH6-M

SND-P5V 5 No No No AN12941

A4R7-P4V 4.7 No No No AD1981B, AN12941

E5V 5

M5V 5

Yes Yes / No

Yes Yes

No PC-Card, USB power

No ICH6-M, MAX6501, LED

1-18 [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

1 Hardware Overview 1.7 Power Supply

Table 1-11 Power supply output rating (2/2)

Power supply （Yes/No）

Name

Voltage

[V]

Power OFF

(Suspend mode)

Power OFF

(Boot mode)

Battery

Object

MCV 5

R3V 2.0 -3.5

TC-S5V 5

Yes Yes

No PSC

Yes Yes Yes

Yes Yes

No Touch sensor

ICH6-M (RTC)

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 1-19

1.8 Batteries 1 Hardware Overview

1.8 Batteries

The PC has the following two batteries.

❑ Main battery ❑ Real time clock (RTC) battery

Table 1-12 lists the specifications for these two batteries.

Table 1-8 Battery specifications

Battery Name Battery Element Output Voltage Capacity

G71C0004H510

Main battery

Real time clock

(RTC) battery

G71C0004H610

P71035009115 Nickel hydrogen 2.4V 16mAh

Lithium ion 10.8V 4,400mAh

1.8.1 Main Battery

The main battery is the primary power supply for the computer when the AC adapter is not connected. In Standby, the main battery maintains the current status of the computer.

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1 Hardware Overview 1.8 Batteries

1.8.2 Battery Charging Control

Battery charging is controlled by a power supply microprocessor. The power supply microprocessor controls power supply and detects a full charge when the AC adaptor and battery are connected to the computer.

❑ Battery Charge

When the AC adapter is connected, normal charging is used while the system is turned on and quick charge is used while the system is turned off. Refer to the following Table 1-13.

Table 1-9 Time required for charges of main battery

Condition Charging Time

Normal charge About 3.5 or longer (hours)

Quick charge About 3.0 (hours)

Charge is stopped in the following cases.

1. The main battery is fully charged

2. The main battery is removed

3. Main battery or AC adapter voltage is abnormal

4. Charging current is abnormal

❑ Data preservation time

When turning off the power in being charged fully, the preservation time is as following Table 1-14.

Standby About 4 days

Shutdown About 35 days

Table 1-10 Data preservation time

Condition preservation time

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 1-21

1.8 Batteries 1 Hardware Overview

1.8.3 RTC Battery

The RTC battery provides the power supply to maintain the date, time, and other system information in memory.

Table 1-15 lists the Time required for charges of RTC battery and data preservation time.

Table 1-11 Time required for charges of RTC battery

Condition Time

Power ON (Lights Power LED) About 8 hours

Data preservation tome (Full-charged) About 30 days

1-22 [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

1 Hardware Overview 1.9 AC Adapter

1.9 AC Adapter

The AC adapter is used to charge the battery.

Table 1-16 lists the AC adapter specifications.

Table 1-12 AC adapter specifications

Parameter

Power 120W (Peak 150W)

Input voltage AC 100 to 240V

Input frequency 50Hz/60Hz

Input voltage 1.7A or less

Output voltage DC 15V

Output current 8.0A

Specification

G71C0002R610

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 1-23

1.9 AC Adapter 1 Hardware Overview

1-24 [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

Chapter 2

Troubleshooting Procedures

[CONFIDENTIAL]

2-ii [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

Chapter 2 Contents

2.1 Troubleshooting ......................................................................................................... 2-1

2.2 Troubleshooting Flowchart........................................................................................ 2-3

2.3 Power Supply Troubleshooting.................................................................................. 2-7

Procedure 1 Power Status Check ............................................................... 2-7

Procedure 2 Error Code Check .................................................................. 2-9

Procedure 3 Connection Check................................................................ 2-15

Procedure 4 Charging Check ................................................................... 2-15

Procedure 5 Replacement Check ............................................................. 2-16

2.4 System Board Troubleshooting................................................................................ 2-17

Procedure 1 Message Check .................................................................... 2-18

Procedure 2 Debugging Port Check......................................................... 2-20

Procedure 3 Diagnostic Test Program Execution Check ......................... 2-36

Procedure 4 Replacement Check ............................................................. 2-36

2.5 USB FDD Troubleshooting .....................................................................................2-37

Procedure 1 FDD Head Cleaning Check ................................................. 2-37

Procedure 2 Diagnostic Test Program Execution Check ......................... 2-38

Procedure 3 Connector Check and Replacement Check.......................... 2-39

2.6 2.5” HDD Troubleshooting...................................................................................... 2-41

Procedure 1 Partition Check..................................................................... 2-41

Procedure 2 Message Check .................................................................... 2-42

Procedure 3 Format Check....................................................................... 2-43

Procedure 4 Diagnostic Test Program Execution Check ......................... 2-44

Procedure 5 Connector Check and Replacement Check.......................... 2-45

2.7 Keyboard Troubleshooting ......................................................................................2-46

Procedure 1 Diagnostic Test Program Execution Check ......................... 2-46

Procedure 2 Connector Check and Replacement Check.......................... 2-47

2.8 Touch pad Troubleshooting ..................................................................................... 2-48

Procedure 1 Diagnostic Test Program Execution Check ......................... 2-48

Procedure 2 Connector Check and Replacement Check.......................... 2-49

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 2-iii

2.9 Display Troubleshooting.......................................................................................... 2-50

Procedure 1 External Monitor Check....................................................... 2-50

Procedure 2 Diagnostic Test Program Execution Check ......................... 2-50

Procedure 3 Connector and Cable Check................................................. 2-51

Procedure 4 Replacement Check ............................................................. 2-52

2.10 Optical Disk Drive Troubleshooting........................................................................ 2-53

Procedure 1 Diagnostic Test Program Execution Check ......................... 2-53

Procedure 2 Connector Check and Replacement Check.......................... 2-53

2.11 Modem Troubleshooting.......................................................................................... 2-55

Procedure 1 Diagnostic Test Program Execution Check ......................... 2-55

Procedure 2 Connector Check and Replacement Check.......................... 2-55

2.12 LAN Troubleshooting.............................................................................................. 2-57

Procedure 1 Diagnostic Test Program Execution Check ......................... 2-57

Procedure 2 Connector Check and Replacement Check.......................... 2-57

2.13 Wireless LAN Troubleshooting ............................................................................... 2-58

Procedure 1 Transmitting-Receiving Check ............................................ 2-58

Procedure 2 Antennas' Connection Check ............................................... 2-59

Procedure 3 Replacement Check ............................................................. 2-60

2.14 Bluetooth Troubleshooting ...................................................................................... 2-61

Procedure 1 Transmitting-Receiving Check ............................................ 2-61

Procedure 2 Antennas' Connection Check ............................................... 2-62

Procedure 3 Replacement Check ............................................................. 2-63

2.15 Sound Troubleshooting............................................................................................ 2-64

Procedure 1 Diagnostic Test Program Execution Check ......................... 2-64

Procedure 2 Connector Check.................................................................. 2-64

Procedure 3 Replacement Check ............................................................. 2-65

2.16 TV Tuner Troubleshooting ...................................................................................... 2-66

Procedure 1 Connector Check and Replacement Check.......................... 2-66

2.17 Bridge media Slot Troubleshooting ......................................................................... 2-67

Procedure 1 Check on Windows XP........................................................ 2-67

Procedure 2 Connector Check and Replacement Check.......................... 2-67

2-iv [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

2.18 PCI ExpressCard Slot Troubleshooting ................................................................... 2-68

Procedure 1 Gigabit Ether ExpressCard .................................................. 2-68

Procedure 2 USB2.0 5in1 ExpressCard ................................................... 2-68

Figures

Figure 2-1 Troubleshooting flowchart............................................................................. 2-4

Figure 2-2 A set of tool for debug port test ................................................................... 2-20

Tables

Table 2-1 Battery icon.................................................................................................... 2-7

Table 2-2 DC IN icon..................................................................................................... 2-8

Table 2-3 Error code .................................................................................................... 2-10

Table 2-4 Debug port (Boot mode) error status .......................................................... 2-21

Table 2-5 Debug port (Suspend mode) error status .....................................................2-29

Table 2-6 Debug port (Resume mode) error status...................................................... 2-32

Table 2-7 FDD error code and status ........................................................................... 2-38

Table 2-8 2.5” Hard disk drive error code and status................................................... 2-44

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 2-v

2-vi [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

2 Troubleshooting Procedures 2.1 Troubleshooting

2.1 Troubleshooting

Chapter 2 describes how to determine which Field Replaceable Unit (FRU) in the computer is causing the computer to malfunction. (The “FRU” means the replaceable unit in the field.) The FRUs covered are:

1. Power supply 7. Display 13. Sound

2. System Board 8. Optical Disk Drive 14. TV Tuner

3. USB FDD 9. Modem 15. Bridge Media slot

4. 2.5” HDD 10. LAN 16. PCI ExpressCard slot

5. Keyboard 11. Wireless LAN

6. Touch pad 12. Bluetooth

The Test Program operations are described in Chapter 3. Detailed replacement procedures are described in Chapter 4.

NOTE: After replacing the system board or CPU, it is necessary to execute the subtest 01

initial configuration of the 3.3 Setting of the hardware configuration in Chapter 3. Also update with the latest BIOS as described in Appendix G “BIOS Rewrite Procedures”

After replacing the LCD, update with the latest EC/KBC as described in Appendix

H “EC/KBC Rewrite Procedures” to set the SVP parameter.

The implement for the Diagnostics procedures is referred to Chapter 3. Also, following implements are necessary:

1. Phillips screwdrivers (For replacement procedures)

2. Implements for debugging port check Toshiba MS-DOS system FD •

•

RS-232C cross cable

•

Test board with debug port test cable

•

PC for displaying debug port test result

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 2-1

2.1 Troubleshooting 2 Troubleshooting Procedures

There are following two types of connections in the figure of board and module connection in and after 2.3 Power Supply Troubleshooting.

(1) Cable connection is described in the figure as line. (2) Pin connection is described in the figure as arrow. <e.g> Connection of modem

2-2 [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

2 Troubleshooting Procedures 2.2 Troubleshooting Flowchart

2.2 Troubleshooting Flowchart

Use the flowchart in Figure 2-1 as a guide for determining which troubleshooting procedures to execute. Before going through the flowchart steps, verify the following:

 Ask him or her to enter the password if a password is registered.

 Verify with the customer that Toshiba Windows is installed on the hard disk. Non-

Windows operating systems can cause the computer to malfunction.

 Make sure all optional equipment is removed from the computer.

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 2-3

2.2 Troubleshooting Flowchart 2 Troubleshooting Procedures

Figure 2-1 Troubleshooting flowchart (1/2)

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2 Troubleshooting Procedures 2.2 Troubleshooting Flowchart

Figure 2-1 Troubleshooting flowchart (2/2)

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 2-5

2.2 Troubleshooting Flowchart 2 Troubleshooting Procedures

If the diagnostics program cannot detect an error, the problem may be intermittent. The Test program should be executed several times to isolate the problem. Check the Log Utilities function to confirm which diagnostic test detected an error(s), then perform the appropriate troubleshooting procedures as follows:

1. If an error is detected on the system test, memory test, display test, CD-ROM/DVD-

ROM test, expansion test, real timer test, sound test or Modem/LAN/Bluetooth /IEEE1394 test, perform the System Board Troubleshooting Procedures in Section 2.4.

2. If an error is detected on the floppy disk test, perform the USB FDD Troubleshooting

Procedures in Section 2.5.

3. If an error is detected on the hard disk test, perform the HDD Troubleshooting

Procedures in Section 2.6.

4. If an error is found on the keyboard test (DIAGNOSTICS TEST) and pressed key

display test (ONLY ONE TEST), perform the Keyboard Troubleshooting Procedures in Section 2.7.

5. If an error is found on the touch pad test (ONLY ONE TEST), perform the touch pad

Troubleshooting Procedures in Section 2.8.

6. If an error is detected on the display test, perform the Display Troubleshooting

Procedures in Section 2.9.

7. If an error is detected on the CD-ROM/DVD-ROM test, perform the Optical Disk

Drive Troubleshooting Procedures in Section 2.10.

8. If an error is detected on the modem test, perform the Modem Troubleshooting

Procedures in Section 2.11.

9. If an error is detected on the LAN test, perform the LAN Troubleshooting Procedures

in Section 2.12.

10. If an error is detected on the wireless LAN test, perform the Wireless LAN

Troubleshooting Procedures in Section 2.13.

11. If an error is detected on the bluetooth test, perform the bluetooth Troubleshooting

Procedures in Section 2.14.

12. If an error is detected on the sound test, perform the Sound Troubleshooting

Procedures in Section 2.15.

2-6 [CONFIDENTIAL] QOSMIO G20 Maintenance Manual (960-511)

2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting

2.3 Power Supply Troubleshooting

The power supply controller controls many functions and components. To determine if the power supply is functioning properly, start with Procedure 1 and continue with the other Procedures as instructed. The procedures described in this section are:

Procedure 1: Power Status Check

Procedure 2: Error Code Check

Procedure 3: Connection Check

Procedure 4: Charging Check

Procedure 5: Replacement Check

Procedure 1 Power Status Check

The following icons indicate the power supply status:

 Battery icon

 DC IN icon

The power supply controller displays the power supply status with the Battery icon and the DC IN icon as listed in the tables below.

Table 2-1 Battery icon

Battery icon Power supply status

Lights orange Battery is charged and the external DC is input. It has no

relation with ON/OFF of the system power.

Lights blue Battery is fully charged and the external DC is input. It has

no relation with ON/OFF of the system power.

Blinks orange (even intervals)

Blinks orange once (at being switched on)

Doesn’t light Any condition other than those above.

The battery level is low while the system power is ON.

The system is driven by only a battery and the battery level is low.

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 2-7

2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures

Table 2-2 DC IN icon

DC IN icon Power supply status

Lights blue DC power is being supplied from the AC adapter.

Blinks orange Power supply malfunction*1

Doesn’t light Any condition other than those above.

*1 When the power supply controller detects a malfunction, the DC IN icon blinks

orange. It shows an error code.

When the icon is blinking, perform the following procedure.

1. Remove the battery pack and the AC adapter.

2. Re-attach the battery pack and the AC adapter.

If the icon is still blinking after the operation above, check the followings:

Check 1 If the DC IN icon blinks orange, go to Procedure 2.

Check 2 If the DC IN icon does not light, go to Procedure 3.

Check 3 If the battery icon does not light orange or blue, go to Procedure 4.

NOTE: Use a supplied AC adapter G71C0002R610.

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2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting

Procedure 2 Error Code Check

If the power supply microprocessor detects a malfunction, the DC IN icon blinks orange. The blink pattern indicates an error as shown below.

 Start Off for 2 seconds

 Error code (8 bit)

“1” On for one second

“0” On for half second

Interval between data bits Off for half second

The error code begins with the least significant digit.

Example: Error code 11h (Error codes are given in hexadecimal format.)

Start

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 2-9

2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures

Check 1 Convert the DC IN icon blink pattern into the hexadecimal error code and compare

it to the tables below. Then go to Check 2.

Table 2-3 Error code

Error code Where error occurs

1*h DC Power (AC Adapter)

2*h Main battery

3:h 2nd battery

4*h S3V output

5*h 1R5-C1V output

6*h A-C3V output

7*h PPV output

8*h PTV output

9*h E5V output

A*h E3V output

B*h PPV output

C*h PGV output

D*h PTV output

E*h 1R9-B1V output

F*h -

 DC power supply (AC adapter)

Error code Meaning

10h AC Adapter output voltage is over 16.5V.

11h Common Dock output voltage is over 16.5V.

12h Current from the DC power supply is over 12.0A.

13h Current from the DC power supply is over 0.5A when there is no load.

14h Abnormal current has been sensed.

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2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting

 1st Battery

Error code Meaning

20h Over voltage has been sensed. (Error code 20h is not supported.)

21h Main battery charge current is over 12.0A.

22h Main battery discharge current is over 0.5A when there is no load.

23h Main battery charge current is over 3.9A when AC adapter is not connected.

24h Abnormal current has been sensed.

25h Main battery charge current is over 0.3A when the charging is off.

 2nd Battery

Error code Meaning

30h Over voltage has been sensed. (Error code 30h is not supported.)

31h Second battery charge current is over 12.0A.

32h Second battery discharge current is over 0.5A when there is no load.

33h Second battery charge current is over 3.1A when AC adapter is not connected.

34h Abnormal current has been sensed.

35h Second battery charge current is over 0.3A when the charging is off.

 S3V output

Error code Meaning

40h S3V voltage is 2.81V or less when the computer is powered on/off.

45h S3V voltage is 2.81V or less when the computer is booting up.(CV support)

 1R5-C1V output

Error code Meaning

50h 1R5-C1 voltage is over 1.80V when the computer is powered on/off.

51h 1R5-C1 voltage is 1.275V or less when the computer is powered on.

52h 1R5-C1 voltage is 1.275V or less when the computer is booting up.

53h 1R5-C1 voltage is 1.275V or less while the computer is suspended.

54h 1R5-C1 voltage is abnormal while the computer is shutdown. (CV support)

55h 1R5-C1 voltage is 1.275V or less when the computer is booting up. (CV support)

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 2-11

2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures

 A-C3V output

Error code Meaning

60h A-C3V voltage is over 3.96V when the computer is powered on/off.

61h A-C3V voltage is 2.81V or less when the computer is powered on.

62h A-C3V voltage is 2.81V or less when the computer is booting up.

63h A-C3V voltage is 2.81V or less while the computer is suspended.

64h A-C3V voltage is abnormal while the computer is shutdown. (CV support)

65h A-C3V voltage is 2.81V or less when the computer is booting up. (CV support)

 PPV output

Error code Meaning

70h PPV voltage is over 1.80V when the computer is powered on/off.

71h PPV voltage is 0.56V or less when the computer is powered on.

72h PPV voltage is 0.56V or less when the computer is booting up.

73h PPV voltage is 0.56V or more when the computer is powered off.

 PTV

Error code Meaning

80h PTV voltage is over 1.26V when the computer is powered on/off.

81h PTV voltage is 0.68V or less when the computer is powered on.

82h PTV voltage is 0.68V or less when the computer is booting up.

83h PTV voltage is 0.68V or more when the computer is powered off.

84h PTV voltage is 0.68V or less while the computer is suspended.

 E5V output

Error code Meaning

90h E5V voltage is over 6.00V when the computer is powered on/off.

91h E5V voltage is 4.50V or less when the computer is powered on.

92h E5V voltage is 4.50V or less when the computer is booting up.

93h E5V voltage is 4.50V or more when the computer is powered off.

94h E5V voltage is 4.50V or less while the computer is suspended.

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2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting

 E3V output

Error code Meaning

A0h E3V voltage is over 3.96V when the computer is powered on/off.

A1h E3V voltage is 2.81V or less when the computer is powered on.

A2h E3V voltage is 2.81V or less when the computer is booting up.

A3h E3V voltage is 2.81V or more when the computer is powered off.

A4h E3V voltage is 2.81V or less when the computer is suspended.

 PPV output

Error code Meaning

B0h PPV voltage is over 1.80V when the computer is powered on/off.

B1h PPV voltage is 0.56V or less when the computer is powered on.

B2h PPV voltage is 0.56V or less when the computer is booting up.

B3h PPV voltage is 0.56V or more when the computer is powered off.

 PGV output

Error code Meaning

C0h PGV voltage is over 1.62V when the computer is powered on/off.

C1h PGV voltage is 0.68V or less when the computer is powered on.

C2h PGV voltage is 0.68V or less when the computer is booting up.

C3h PGV voltage is 0.68V or more when the computer is powered off.

C4h PGV voltage is 0.68V or less while the computer is suspended.

 PTV output

Error code Meaning

D0h PTV voltage is over 1.26V when the computer is powered on/off.

D1h PTV voltage is 0.68V or less when the computer is powered on.

D2h PTV voltage is 0.68V or less when the computer is booting up.

D3h PTV voltage is 0.68V or more when the computer is powered off.

D4h PTV voltage is 0.68V or less while the computer is suspended.

QOSMIO G20 Maintenance Manual (960-511) [CONFIDENTIAL] 2-13

2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures

 1R9-B1V output

Error code Meaning

E0h 1R9-B1V voltage is over 2.40V when the computer is powered on/off.

E1h 1R9-B1V voltage is 1.53V or less when the computer is powered on.

E2h 1R9-B1V voltage is 1.53V or less when the computer is booting up.

E3h 1R9-B1V voltage is 1.53V or more when the computer is powered off.

E4h 1R9-B1V voltage is 1.53V or less while the computer is suspended.

Check 2 In the case of error code 10h or 12h:

 Make sure the AC adapter and AC power cord are firmly plugged into the DC

IN 15 V socket and wall outlet. If the cables are connected firmly, go to the following step:

 Connect a new AC adapter and AC power cord. If the problem still occurs, go

to Procedure 5.

Check 3 In the case of error code 21h:

 Go to Procedure 3.

Check 4 For any other errors, go to Procedure 5.

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2 Troubleshooting Procedures 2.3 Power Supply Troubleshooting

Procedure 3 Connection Check

The wiring diagram related to the power supply is shown below:

DC-IN jack

CN8811

CN9691

CN8810

CN8020

CN9690

Battery power harness

Power code

adapter

Battery signal harness

Battery pack

10-pin

Any of the connectors may be disconnected. Perform Check 1.

Check 1 Make sure the AC adapter and the AC power cord are firmly plugged into the DC

IN jack and wall outlet. If these cables are connected firmly, go to Check 2.

Check 2 Replace the AC adapter and the AC power cord with new ones.

• If the DC IN icon does not light, go to Procedure 5.

• If the battery icon does not light, go to Check 3.

Check 3 Make sure the battery pack is installed in the computer correctly. If the battery is

properly installed and the battery icon still does not light, go to Procedure 4.

Procedure 4 Charging Check

Check if the power supply controller charges the battery pack properly. Perform the following procedures:

Check 1 Make sure the AC adapter is firmly plugged into the DC IN jack.

Check 2 Make sure the battery pack is properly installed. If it is properly installed, go to

Check 3.

Check 3 The battery pack may be completely discharged. Wait a few minutes to charge the

battery pack while connecting the battery pack and the AC adapter. If the battery pack is still not charged, go to Check 4.

Check 4 The battery’s temperature is too high or low. Leave the battery for a while to adjust

it in the right temperature. If the battery pack is still not charged, go to Check 5.

Check 5 Replace the battery pack with a new one. If the battery pack is still not charged, go

to Procedure 5.

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2.3 Power Supply Troubleshooting 2 Troubleshooting Procedures

Procedure 5 Replacement Check

The power is supplied to the system board by the AC adapter. If either the AC adapter or the system board was damaged, perform the following Checks.

To disassemble the computer, follow the steps described in Chapter 4, Replacement Procedures.

When AC adapter is connected;

Check 1 AC adapter may be faulty. Replace the AC adapter with a new one. If the problem

still occurs, perform Check 2.

Check 2 System board may be faulty. Replace the system board with a new one.

When AC adapter is not connected; (When driving with battery pack)

Check 1 Battery pack may be faulty. Replace it with a new one. If the problem still occurs,

perform Check 2.

Check 2 BT board may be faulty. Replace it with a new one. If the problem still occurs,

perform Check 3.

Check 3 Battery signal harness or battery power harness may be faulty. Replace it with a

new one. If the problem still occurs, perform Check 4.

Check 4 System board may be faulty. Replace it with a new one.

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2 Troubleshooting Procedures 2.4 System Board Troubleshooting

2.4 System Board Troubleshooting

This section describes how to determine if the system board is malfunctioning or not. Start with Procedure 1 and continue with the other procedures as instructed. The procedures described in this section are:

Procedure 1: Message Check

Procedure 2: Debugging Port Check

Procedure 3: Diagnostic Test Program Execution Check

Procedure 4: Replacement Check

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2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Procedure 1 Message Check

When the power is turned on, the system performs the Initial Reliability Test (IRT) installed in the BIOS ROM. The IRT tests each IC on the system board and initializes it.

 If an error message is shown on the display, perform Check 1.

 If there is no error message, go to Procedure 2.

 If MS-DOS or Windows OS is properly loaded, go to Procedure 4.

Check 1 If one of the following error messages is displayed on the screen, press the F1 key

as the message instructs. These errors occur when the system configuration preserved in the RTC memory (CMOS type memory) is not the same as the actual configuration or when the data is lost.

If you press the F1 key as the message instructs, the SETUP screen appears to set

the system configuration. If error message (b) appears often when the power is turned on, replace the RTC battery. If any other error message is displayed, perform Check 2.

(a) *** Bad HDD type ***

Check system. Then press [F1] key ......

(b) *** Bad RTC battery ***

Check system. Then press [F1] key ......

(d) *** Bad memory size ***

Check system. Then press [F1] key ......

(e) *** Bad time function ***

Check system. Then press [F1] key ......

(f) *** Bad check sum (CMOS) ***

Check system. Then press [F1] key ......

(g) *** Bad check sum (ROM) ***

Check system. Then press [F1] key ......

Check 2 If the following error message is displayed on the screen, press any key as the

message instructs. The following error message appears when data stored in RAM under the resume function is lost because the battery has become discharged or the system board is damaged. Go to Procedure 3.

WARNING: RESUME FAILURE.

PRESS ANY KEY TO CONTINUE.

If any other error message displays, perform Check 3.

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2 Troubleshooting Procedures 2.4 System Board Troubleshooting

Check 3 The IRT checks the system board. When the IRT detects an error, the system stops

or an error message appears.

If one of the following error messages (1) through (17), (23) or (24) is displayed, go to Procedure 4.

If error message (18) is displayed, go to the Keyboard Troubleshooting Procedures.

If error message (19), (20) or (21) is displayed, go to the HDD Troubleshooting Procedures.

If error message (22) is displayed, go to the USB FDD Troubleshooting Procedures.

(1) PIT ERROR (2) MEMORY REFRESH ERROR (3) TIMER CH.2 OUT ERROR (4) CMOS CHECKSUM ERROR (5) CMOS BAD BATTERY ERROR (6) FIRST 64KB MEMORY ERROR (7) FIRST 64KB MEMORY PARITY ERROR (8) VRAM ERROR (9) SYSTEM MEMORY ERROR (10) SYSTEM MEMORY PARITY ERROR (11) EXTENDED MEMORY ERROR (12) EXTENDED MEMORY PARITY ERROR (13) DMA PAGE REGISTER ERROR (14) DMAC #1 ERROR (15) DMAC #2 ERROR (16) PIC #1 ERROR (17) PIC #2 ERROR (18) KBC ERROR (19) HDC ERROR (20) HDD #0 ERROR (21) HDD #1 ERROR (22) NO FDD ERROR (23) TIMER INTERRUPT ERROR (24) RTC UPDATE ERROR

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2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Procedure 2 Debugging Port Check

Check the D port status by a debug port test. The tool for debug port test is shown below.

Figure 2-2 A set of tool for debug port test

The test procedures are follows:

1. Connect the debug port test cable to the connector CN3400 of the system board. For

disassembling to connect the test cable, refer to Chapter 4.

2. Connect the debug port test cable and RS-232C cross-cable to the test board.

3. Connect the RS-232C cross-cable to the PC that displays the results.

4. Boot the computer in MS-DOS mode.

5. Execute GETDPORT.COM in the text menu in CPU REAL mode. (Insert the FD for

starting D port into FDD and input “FD starting drive:>dport”.)

The D port status is displayed in the following form;

6. When the D port status is FFFFh (normal status), go to Procedure 4.

7. When the D port status falls into any status in Table 2-4, execute Check 1.

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2 Troubleshooting Procedures 2.4 System Board Troubleshooting

Table 2-4 Debug port (Boot mode) error status (1/8)

D port status Inspection items Details

F000h

F001h

F002h

F003h

Permission of A20 and Clear of software reset bit

Prohibition of APIC

Initialization of MCHM

Initialization of ICHM

Initialization of Super I/O

Initialization of debug port

Dummy read of 3rd Bus data

PIT CH0 initialization (for HOLD_ON)

BIOS rewrite factor flag initialization

CHECK SUM CHECK

EC/KBC rewrite check

If “rewrite” is requested, go to “BIOS rewrite process”.

Transition of process to System BIOS IRT when returned to S3)

BIOS rewrite request check

BIOS rewrite request check if Checksum check error occurred on except Boot Block or rewrite is required by user. “BIOS rewrite process”.

Transits to System BIOS IRT

Transition to protected mode

Boot block checksum (skip when returned to S3) (halts when error)

Checksum other than boot block (skip when returned to S3)

Key input

Check of Tilde key, Tab key if a key is pressed

BIOS rewrite

Initialization of ICHM. D31

DRAM configuration

Permission of cache (L1 cache only)

Memory clear

Transition to real mode and copy of BIOS to RAM

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2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Table 2-4 Debug port (Boot mode) error status (2/8)

D port status Inspection items Details

F005h

IRT

F100h

Saving key scan code

Setting TASK_1ms_TSC

Controlling fan

Initializing sound items (for BEEP)

Enabling system speaker

Releasing mute

Making the volume max.

When request BIOS, EC/KBC rewriting

Blinks green (cycle:2s, on:1s, off:1s)

When BIOS ROM abnormal Blinks orange (cycle:2s, on:1s, off:1s)

Key input Prohibition of USB

BEEP

Waiting for key input

Reading CHGBIOSA.EXE / CHGFIRMA.EXE

FDC reset Setting parameters for 2HD(1.44MB)

Reading of first sector, If it is the data of

1.44MB (2HD), the media type is definite.

Setting of parameters for 2DD (720KB)

Retrieval of “CHGBIOSA.EXE” from the root directory.

Directory start header and calculates the sector

Read 1 sector of the root directory

Retrieval of entry of “CHGBIOSA.EXE” /“CHGFIRMA.EXE” from the sector read.

Reading of EXE header of “CHGBIOSA.EXE” and “CHGFIRMA.EXE”

Execution of “CHGBIOSA.EXE”

(Key input when error occurred.)

and “CHGFIRMA.EXE”

Prohibition of cache

Initialization of H/W (before DRAM recognition)

Initialization of MCHM

Initialization of ICH6M.D31.Func0

Initialization of ICH6M.D31.Func1

Initialization of USB.Func0,1,2,7

Initialization of ICH6M.D31.Func3

Initialization of ICH6M.D31.Func5

Initialization of FLUTE

Initialization of PIT channel 1

(Setting the refresh interval “30µs”)

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2 Troubleshooting Procedures 2.4 System Board Troubleshooting

Table 2-4 Debug port (Boot mode) error status (3/8)

D port status Inspection items Details

F101h

F102h

F103h

Checking DRAM type and size (at cold boot)

Testing the stack area of SMRAM

Configuring cache memory

Permission of L1/L2 cache memory

Checking the access of a CMOS (Only in Cold Boot)

Examining the battery level of CMOS

Checksum check of CMOS

Initializing data in CMOS (1)

Setting up IRT status

Storing the size of DRAM

Branch of resuming (only in Cold Boot)

When unsupported memory connected, beeps and halts. (When DRAM size = o, it halts.)

(When it can not be used, halts.)

(When error detected, it halts.)

(Setting of boot status and IRT busy flag, The rest bit is 0)

When a CMOS error is detected, no resume occurs.

Resume error process

If “resume status code” is not set, no resume occurs.

Resume error check S3 recovery error (ICH) Resume error F17AH SM-RAM checksum check Resume error F173H Memory configuration change check Resume error F173H Checksum check of system BIOS RAM area Resume error F179H Checksum check of expansion memory Resume error F176H Checksum check of PnP RAM Resume error F177H To resume process (RESUME_MAIN)

Returns the CPU clock to “Low”

Prohibition of all SMI

Clears resume status

Return to ROM

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2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Table 2-4 Debug port (Boot mode) error status (4/8)

D port status Inspection items Details

Copying ROM/RAM of system BIOS

F104h

SMRAM initialization

WakeUp factor check

SMRAM base rewriting and CPU state map saving for BIOS

Permission of SMI based on ASMI

F105h

Initialization of devices which need initialization before PCI bus initialization

Forwards the area of C0000h to EFFFFh to PCI (prohibition of DRAM)

Sets resume error request

(When error occurred, it halts.)

PIT test (at Cold boot only) and initialization Setting of test pattern to channel 0 of PIT#0 Check whether the set test pattern can be read. Initialization of PIT channel 0 (Setting of timer interruption interval to 55ms) Initialization of PIT channel 2 (Setting of the sound generator frequency to 664Hz)

Test of PIT channel 1 (Check whether the refresh signal works normally in 30 micro-s refresh interval)

(The system halts when the time is out.)

Test of PIT channel 2

(Check if the speaker gate works properly.)

CPU clock measurement

Check of parameter block A

Permission of SMI except auto-off function

Control on excess of rated input power

Battery discharge current control (1CmA)

AC adapter rated over current control

Dividing procedures for time measuring by IRT

Setting for clock generator

CPU Initialization

Update of micro code Judge of CPU type Geyserville support check Setting of CPU clock to “high"

Graphics Aperture Size setting

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2 Troubleshooting Procedures 2.4 System Board Troubleshooting

Table 2-4 Debug port (Boot mode) error status (5/8)

D port status Inspection items Details

F106h

Saving memory configuration to buffer

Reading of EC version

Update of flash ROM type

Judging of destination (Japan or except Japan) based on DMI data

CMOS default setting check Defaults set if bad battery, bad checksum (ROM,

CMOS) is detected)

ACPI table initialization (for execution of option ROM)

Initialization of devices which need initialization before PCI bus initialization

AC’97 control

Initialization of temperature control information

KBC initialization

VGA display off, Reset control

Sound initialization

HC initialization, USB Device recognition and initialization

Control of built-in LAN permission/prohibition

F107h

F108h

F109h

PIC initialization

PIC test

Password Initialization

PCI bus initialization (connection of DS Bus)

Initialization of LAN information

Check of WakeUp factor

Task generation for waiting INIT_PCI completion

CMOS data initialization (2)

PnP initialization

Setting of setup items

H/W setting based on resource

Task generation for waiting PnP resource making completion

PnP H/W initialization PC card slot initialization

PCI automatic configuration

Making of work for automatic configuration

Acquisition of PCI IRQ

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2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Table 2-4 Debug port (Boot mode) error status (6/8)

D port status Inspection items Details

(F109h)

F10Ah

F10Bh

F10Ch

F10Dh

F10Eh

Configuration

Saving of VGA configuration result

Task generation for waiting PCI_CONFIGURATION completion

Initialization of H/W needed after PCI configuration

Enabling power off

Output code generation

HDD initialization sequence start

FIRST_64KB_CHECK (Check of first 64KB memory)

INIT_INT_VECTOR (Initialization of vectors)

INIT_NDP (Initialization of NDP)

INIT_SYSTEM

(Initialization of system)

Storing of CMOS error status to IRT_ERR_STS_BUF

Timer initialization start

EC initialization & Reading of battery information

Update of system BIOS (Update of EDID information for LCD)

F10Fh

F110h

F112h

F113h

F114h

F115h

INIT_DISPLAY

Waiting for VGA chip initialization completion, VGA BIOS initialization

Waiting for VGA power ON

Waiting for Display access completion

Calling VGA BIOS

DISP_LOGO

Displaying logo

SYS_MEM_CHECK Check of convention memory in the protected

mode (boot)

EXT_MEM_CHECK Check of exception in the protected mode

(boot)

Check of exception in the

DPORT= F116H when error

protected mode

INIT_SYS_MEM Initialization of conventional memory (Reboot)

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2 Troubleshooting Procedures 2.4 System Board Troubleshooting

Table 2-4 Debug port (Boot mode) error status (7/8)

D port status Inspection items Details

F117h

F118h

F119h

F11Ch

F11Dh

F11Eh

CHK_DMA_PAGE Check of DMA Page Register (Boot)

CHECK_DMAC Check of DMAC (Boot)

INIT_DMAC Initialization of DMAC (Boot)

(In the case of “Reboot”)

Waiting for HDD initialization completion

Check of key input during IRT (waiting for KBC initialization completion) I/O LOCK process

BOOT_PASSWORD (password check)

ATA priority initialization (In the case of “Reboot”)

Waiting for HDD initialization Check of key input during IRT (waiting for KBC

initialization completion) ATA priority initialization (In the case of “Boot”) Check of key input during IRT (waiting for KBC

initialization completion) Input of password

(Waiting for completion of initializing HDD)

EX_IO_ROM_CHECK Check of option I/O ROM

PRE_BOOT_SETUP

Saving of value in 40:00h (for SIO saving/restoring)

Setting of font address for resume password

Setting of repeat parameter for USB KB

Final check of key input during IRT

Storing of T_SHADOW_RAM_SIZE

Update of system resource before boot

Rewriting of memory map data of INT15h E820h function

Waiting for AC-Link initialization completion

Renewal table for DMI

Copying ACPI table to uppermost of extension memory

Waiting for completion of BIOS rewriting of PSC version

Waiting for completion of setting clock generator When error occurred, halts at DPORT=F11FH

Cancel of NMI Mask

TIT check sum

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2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Table 2-4 Debug port (Boot mode) error status (8/8)

D port status Inspection items Details

(F11Eh)

Prohibition of unused PC card

Setting Wakeup status data for ACPI

HW initialization before Boot, Waiting for

Clearance of IRT status F120h

Clearance of the IRT flag of Runtime side

Update of check sum of Runtime side

Initialization of Bluetooth

Check of target maintenance card

initialization completion

Notifies the DVI connection status to VGA BIOS

Setting of battery save mode

Setting of date

Waiting for Bluetooth initialization completion

Update of DMI Wakeup factor, Update of SM-

BIOS structure table

PCI device configuration space close

Cache control

Process for CPU

Make the CPU clock to be set by SETUP

Waiting of motor-off completion of disabled HDD

Final decision of USB FDD drive information

Post processing of PRE_BOOT_SETUP

Clearance of PWRBTN_STS

Enabling POWER Button

Measure on chip set defective

Update of check sum of Runtime side

FFFFh End

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2 Troubleshooting Procedures 2.4 System Board Troubleshooting

Table 2-5 Debug port (Suspend mode) error status (1/3)

D port status Inspection items Details

Suspend mode

F130h

F131h

F132h Powering-off during resuming

When powering-off request from OS is required, waiting for the completion of dividing process because waiting in SUSPEND of Runtime returns the process to OS.

Forced execution of dividing (Permission of SMI for dividing)

Waiting for completion of dividing

After prohibiting of all SMI, permits I/O trap (EHCI) and external SMI.

Starts dividing to transmit periodically extension command (every 25 seconds) not to generate time-out of power-off.

Clears resume/power-off status.

Storing and initializing of special configuration register

Prohibits clock control

Recognition of suspending for boot/ resume

Branch of resume mode (DPORT= F132h) or boot mode(DPORT=F133h)

Halt of HC

Starts sequence for storing display system.

F133h

Resume error check in suspend mode. Checks if in IRT.

Execution of driver for suspend

Clearing of data for Remote Lockout

Storing of USB register

Halt of HC

Storing CPU register

Permission of system area, memory cache

Suspending of HDD

Storing KBC,SCC and MOUSE

Storing of PCI device

Checks if external option ROM are connected

(to work at high-speed)

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2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Table 2-5 Debug port (Suspend mode) error status (2/3)

LED Status Test item Contents

(F133h)

Starts sequence for storing display system.

Storing of PIC

Storing of DMAC

Storing of system status command port

Storing of PCMCIA card

Storing of RTC

Storing of original HW for system

Storing of PIT

Calculation of check sum (conventional memory)

Suspend process for boot mode

F137h

Suspending of HDD (boot)

Transition to S5 of Bluetooth (boot) (For models supporting Bluetooth)

F138h

Suspending of boot / resume for password (Stores password information into Flash ROM.)

F139h

F13Ah

Processing of VGA –off (boot)

Suspending of boot / resume for PnP

Waiting for completion of suspending for HDD password

Prohibition of PCI arbiter

(Stores PnP resource information into Flash ROM.)

Setting of Wakeup event

Power-off of PC card

Re-setting backup current

F13Bh

Forced off of fan

Checks if off-process for resume is needed

Power LED control during suspending

Isolates built-in LAN.

Makes the power of sound off.

Model-unique processing just before suspending Waiting for completion of dividing for suspending Stops dividing of extension command for power off.

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2 Troubleshooting Procedures 2.4 System Board Troubleshooting

Table 2-5 Debug port (Suspend mode) error status (3/3)

LED Status Test item Contents

F13Ch

Calculation of check sum of PnP RAM area Not work in suspending for boot

F13Dh

Measure for USB over current

Acquires how to turn the power off

Resets by EC (when required)

Makes not to send Eject Power Off command when turning the power off by the date check of alarm power on

Prohibition of all SMI

Initializing of special register in suspend

Calculates the check sum of SMRAM and stores it in SMRAM Calculates the checksum of system BIOS in the IRT side

Setting status of suspend completion

Prohibition of L1&L2

Power off Completion of BIOS

Checksum does not match during IRT and Runtime

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2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Table 2-6 Debug port (Resume mode) error status (1/4)

LED Status Test item Contents

Resume

F100h Refer to IRT

F101h Refer to IRT

F102h Refer to IRT

F103h

F121h

F122h

Refer to IRT

Clears flag for SMI control.

Renewal of Resume counter

Checks the WakeUp factors.

Rewriting of SMRAM BASE

Initializing devices necessary for initialization before initializing PCI bus

Initializing of PIT

Initializing of PIT channel 0 (Sets the interval of timer interruption to 55ms) Initializing of PIT channel 2 (Sets the sound generator frequency to 664Hz)

Measuring CPU clock

Recovery of PIC register

Initialization 2 of devices necessary for initialization before initializing PCI bus

Permission of SMI other than auto-off function

Control of excess of rated input power

Control of battery discharging current (1CmA)

Control of excess of rated current of AC adapter

Dividing for measuring of IRT time

Setting to clock generator

Check of parameter block A

Initializing of CPU

Updating micro-code

Judge of CPU type

Check of supporting Geyserville

Sets the CPU clock to High

Setting of Graphics Aperture Size

AC'97 control

Initializing of temperature control information

Initializing of KBC

VGA display-off and Reset control

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2 Troubleshooting Procedures 2.4 System Board Troubleshooting

Table 2-6 Debug port (Resume mode) error status (2/4)

LED Status Test item Contents

(F122h)

F123h

F124h

Start recovery of VGA

Initializing of sound

Acquires the multi-box status

Initializing of HC, recognizing of devices

Control of permission/prohibition for built-in LAN

Check of the checksum of conventional memory

Initializing of PCI devices

Check of WakeUp factors after initializing PCI bus Waiting for initializing of devices which have to be initialized before setting HW

by PnP resource Recovery of each device (1)

Resume error DPORT=F174H

Processing of RESUME for PnP

Waiting for the completion of VGA power-down control (because the VGA configuration can not be seen)

Processing of RESUME for PCI

F125h

F126h

F128h

F129h

Recovery of PCMCIA card

Error when an ATA card is pulled out (Resume error DPORT=17BH)

Executing of dividing process of device detection of PC card

Check of HDD pack connection

Start of IDE device resume sequence

Recovery of user alarm setting and cancel of alarm power-on function

Enable of power-off switch

Initializing EC and start of reading battery information

Recovery of each device(2) Setting of setup items

Initializing of DMAC

Initializing of VGA BIOS in resume Waiting for VGA power on

Call of VGA BIOS

Processing of password for RESUME

Recovery of each device(3) Recovery of DMAC register

Resume error when HDD is mounted DPORT=F172h

(This function works only one time)

PnP Resume processing (2nd)

Motor-off of disabled HDD

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2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Table 2-6 Debug port (Resume mode) error status s (3/4)

LED status Test item Contents

F12Ah

Waiting for completion of USB initializing

Recovery of USB register

Recovery of CPU register

Resetting NDP interruption

Wakeup check

Setting WAKEUP status data for ACPI

Waiting for completion of KBC initializing (not in ACPI mode)

Recovery of system, status command and port

Initializing HW just before booting or waiting for the completion

Setting battery saving mode

Setting of date

Closing PCI device configuration area

Cache control

Notifies the device change status to the high rank.

Notifies the DVI connection status to VGA BIOS

Waiting for the completion of Bluetooth initializing (models supporting Bluetooth) Renewal of Wakeup factor of DMI and SM-BIOS structure table

Update of parameter block A

Recovery of PIC MASK

Executing of driver for RESUME

Setting of CPU clock to SETUP designation

Waiting for motor-off of disabled HDD

Final decision of USB FDD information

Post-process of PRE_BOOT_SETUP

Clears PWRBTN_STS

Enables Power Button

Measures against chip set defective

Waiting for the completion of recovery of VGA register

Recovery of PIT register

Recovery of PCI configuration register

Process related to CPU

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2 Troubleshooting Procedures 2.4 System Board Troubleshooting

Table 2-6 Debug port (Resume mode) error status (4/4)

LED status Test item Contents

F12Bh

Checks if the power-off switch is pressed or not during resume processing

(Suspends if pressed)

Executes HOTKEY F1 processing when booting in instant security

F12Ch

F12Dh

F12Eh

FFFFh (In ACPI mode / not in ACPI mode)

(Not in ACPI mode) Clears key buffer

(In ACPI mode) Clears IRT status

(In ACPI mode)

Clears flag in Resume process

Acquires Wake Up Vector address.

Clears key buffer

Update of date/time

ACPI mode on

Recovery of write-protected status before

Returning to the main process

NOTE: Status outputted by the test means the last error detected in the debug port test.

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2.4 System Board Troubleshooting 2 Troubleshooting Procedures

Procedure 3 Diagnostic Test Program Execution Check

Execute the following tests from the Diagnostic Test Menu. These tests check the system board. Refer to Chapter 3, Tests and Diagnostic, for more information on how to perform these tests.

1. System test

2. Memory test

3. Keyboard test

4. Display test

5. Floppy Disk test

6. Printer test [It is not supported]

7. Async test [It is not supported]

8. Hard Disk test

9. Real Timer test

10. NDP test

11. Expansion test

12. CD-ROM/DVD-ROM test

13. Only One test

14. Wireless LAN test

15. LAN/Modem/Bluetooth/IEEE1394 test

16. Sound test

If an error is detected during these tests, go to Procedure 4.

Procedure 4 Replacement Check

System board may be faulty. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and replace system board with a new one.

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2 Troubleshooting Procedures 2.5 USB FDD Troubleshooting

2.5 USB FDD Troubleshooting

To check if the USB FDD is malfunctioning or not, follow the troubleshooting procedures below as instructed.

Procedure 1: FDD Head Cleaning Check

Procedure 2: Diagnostic Test Program Execution Check

Procedure 3: Connector Check and Replacement Check

Procedure 1 FDD Head Cleaning Check

FDD head cleaning is one option available in the Diagnostic Program.

After connecting USB FDD, insert the Diagnostics Disk in the floppy disk drive. Turn on the computer and run the test. And then clean the FDD heads using the cleaning kit. If the FDD still does not function properly after cleaning, go to Procedure 2.

Detailed operation is given in Chapter 3, Tests and Diagnostics.

If the test program cannot be executed on the computer, go to Procedure 3.

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2.5 USB FDD Troubleshooting 2 Troubleshooting Procedures

Procedure 2 Diagnostic Test Program Execution Check

Insert the Diagnostics Disk in the USB FDD, turn on the computer and run the test. Refer to Chapter 3, Tests and Diagnostics, for more information about the diagnostics test procedures.

Make sure the floppy disk is formatted correctly and that the write protect tab is disabled. Floppy disk drive test error codes and their status names are listed in Table 2-7. If any other errors occur while executing the FDD diagnostics test, go to Check 1.

Table 2-7 FDD error code and status

Code Status

01h Bad command

02h Address mark not found

03h Write protected

04h Record not found

06h Media replaced

08h DMA overrun error

09h DMA boundary error

10h CRC error

20h FDC error

40h Seek error

60h FDD not drive

80h Time out error (Not ready)

EEh Write buffer error

FFh Data compare error

Check 1 If the following message is displayed, disable the write protect tab on the floppy

disk by sliding the write protect tab to “write enable”. If any other message appears, perform Check 2.

Write protected

Check 2 Make sure the floppy disk is formatted correctly. If it is, go to Procedure 3.

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2 Troubleshooting Procedures 2.5 USB FDD Troubleshooting

Procedure 3 Connector Check and Replacement Check

USB FDD is connected to USB port on system board and US board. US board is also connected to system board by cable. The connection of cable and board may be defective. Otherwise, they may be faulty. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and perform the following checks.

USB FDD can be connected to the following 4 ports. (System board x 2 ports, SJ board x 2 ports)

CN4610

CN4611

USB FDD

USB harness

CN4612

CN4620

CN4622

Check 1 Make sure USB FDD is firmly connected to USB port. If the connection is loose,

connect firmly and repeat Procedure 2. If the problem still occurs, go to Check 2.

NOTE: When checking the connection, be sure to check it with care for the followings.

1. Cable can not be disconnected from the connector.

2. Cable is connected straight to the connector.

3. Cable is connected all the way seated in the connector.

4. Cable can not be broken.

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2.5 USB FDD Troubleshooting 2 Troubleshooting Procedures

Check 2 USB FDD may be faulty. Replace it with a new one. If the problem still occurs,

perform Check 3.

Check 3 Connect USB FDD to each port embedded on system board and on SJ board.

Then, check if it works properly. If it does not work properly when connected to CN4621/CN4620, perform Check 4. If it does not work properly when connected to CN4610 or all ports, perform Check 6.

Check 4 USB harness may be faulty. Replace it with a new one following the steps in

Chapter 4, Replacement Procedures. If the problem still occurs, perform Check 5.

Check 5 SJ board may be faulty. Replace it with a new one following the steps in Chapter

4, Replacement Procedures. If the problem still occurs, perform Check 6.

Check 6 System board may be faulty. Replace it with a new one following the steps in

Chapter 4, Replacement Procedures.

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2 Troubleshooting Procedures 2.6 2.5” HDD Troubleshooting

2.6 2.5” HDD Troubleshooting

To check if 2.5” HDD is malfunctioning or not, follow the troubleshooting procedures below as instructed.

Procedure 1: Partition Check

Procedure 2: Message Check

Procedure 3: Format Check

Procedure 4: Diagnostic Test Program Execution Check

Procedure 5: Connector Check and Replacement Check

CAUTION: The contents of the hard disk will be erased when the 2.5” HDD

troubleshooting procedures are executed. Transfer the contents of the hard disk to floppy disks or other storage drive(s). For the backup, refer to the User’s Manual.

Procedure 1 Partition Check

Insert the Toshiba MS-DOS system disk and start the computer. Perform the following checks:

Check 1 Input C: and press Enter. If you cannot change to drive C, go to Check 2. If you

can change to drive C, go to Procedure 2.

Check 2 Input FDISK and press Enter. Choose Display Partition Information from the

FDISK menu. If drive C is listed in the Display Partition Information, go to Check

3. If drive C is not listed, return to the FDISK menu and choose the option to create a DOS partition or a logical DOS drive on drive C. If the problem still occurs, go to Procedure 2.

Check 3 If drive C is listed as active in the FDISK menu, go to Check 4. If drive C is not

listed as active, return to the FDISK menu and choose the option to set the active partition for drive C. Then go to Procedure 2.

Check 4 Remove the system disk from the FDD and reboot the computer. If the problem

still occurs, go to Procedure 2. Otherwise, the 2.5” HDD is operating normally.

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2.6 2.5” HDD Troubleshooting 2 Troubleshooting Procedures

Procedure 2 Message Check

When the power is turned on, the system performs the Initial Reliability Test (IRT) installed in the BIOS ROM. When the test detects an error, an error message is displayed on the screen.

Make sure no floppy disk is in the FDD. Turn on the computer and check the message on the screen. When an OS starts from the 2.5” HDD, go to Procedure 3. Otherwise, start with Check 1 below and perform the other checks as instructed.

Check 1 If any of the following messages appear, go to Procedure 3. If the following

messages do not appear, perform Check 2.

HDC ERROR

HDD #X ERROR (After 5 seconds this message will disappear.)

Check 2 If either of the following messages appears, go to Check 3. If the following

messages do not appear, perform Check 4.

Insert system disk in drive

Press any key when ready .....

Non-System disk or disk error Replace and press any key when ready

Check 3 Using the SYS command of the MS-DOS, transfer the system to the 2.5” HDD. If

the system is not transferred, go to Procedure 3. Refer to the MS-DOS Manual for detailed operation.

If the following message appears on the display, the system program has been transferred to the HDD.

System Transferred

If an error message appears on the display, perform Check 4.

Check 4 2.5” HDD(s) and the connector(s) of system board may be defective (Refer to the

steps described in Chapter 4, Replacement Procedures for disassembling.). Insert HDD(s) to the connector(s) firmly. If it is (or they are) firmly connected, go to Procedure 3.

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2 Troubleshooting Procedures 2.6 2.5” HDD Troubleshooting

Procedure 3 Format Check

The computer’s HDD is formatted using the MS-DOS FORMAT program or the physical format program of the test program. To format the HDD, start with Check 1 below and perform the other steps as required.

Refer to the MS-DOS Manual for the operation of MS-DOS. For the format by the test program, refer to the Chapter 3.

Check 1 Format an 2.5” HDD using MS-DOS FORMAT command. Type as FORMAT

C:/S/U.

If 2.5” HDD can not be formatted, perform Check 2.

Check 2 Using the MS-DOS FDISK command, set the 2.5” HDD partition. If the partition

is not set, go to Check 3. If it is set, format 2.5” HDD using MS-DOS FORMAT command.

Check 3 Using the Diagnostic Disk, format 2.5” HDD with a format option (physical

format). If HDD is formatted, set the 2.5” HDD partition using MS-DOS FDISK command.

If you cannot format 2.5” HDD using the Tests and Diagnostic program, go to Procedure 4.

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2.6 2.5” HDD Troubleshooting 2 Troubleshooting Procedures

Procedure 4 Diagnostic Test Program Execution Check

The HDD test program is stored in the Diagnostics Disk. Perform all of the HDD tests in the Hard Disk Drive Test. Refer to Chapter 3, Tests and Diagnostics, for more information about the HDD test program.

If an error is detected during the HDD test, an error code and status will be displayed. The error codes and statuses are described in Table 2-8. If an error code is not displayed but the problem still occurs, go to Procedure 5.

Table 2-8 2.5” Hard disk drive error code and status

Code Status

05 HDD - HDC NOT RESET ERROR

07 HDD - DRIVE NOT INITIALIZE

09 HDD - DMA BOUNDARY ERROR

0B HDD - BAD TRACK ERROR

BB HDD - UNDEFINED ERROR

08 HDD - OVERRUN ERROR (DRQ ON)

01 HDD - BAD COMMAND ERROR

02 HDD - ADDRESS MARK NOT FOUND

04 HDD - RECORD NOT FOUND ERROR

10 HDD - ECC ERROR

20 HDD - HDC ERROR

40 HDD - SEEK ERROR

80 HDD - TIME OUT ERROR

11 HDD - ECC RECOVER ENABLE

AA HDD - DRIVE NOT READY

CC HDD - WRITE FAULT

E0 HDD - STATUS ERROR

0A HDD - BAD SECTOR

EE HDD - ACCESS TIME ERROR

DA HDD - NO HDD

12 HDD - DMA CRC ERROR

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2 Troubleshooting Procedures 2.6 2.5” HDD Troubleshooting

Procedure 5 Connector Check and Replacement Check

HDD(s) is/are connected to the connector(s) on the system board. The connection of HDD(s) and board may be defective. Otherwise, they may be faulty. Disassemble the computer following instructions in Chapter 4, Replacement Procedures and perform the following checks.

Check 1 Make sure HDD(s) is/are firmly connected to the connector(s) on the system

board.

1st HDD

22-pin

2nd HDD

CN1850

CN1860

If any of the connections are loose, reconnect firmly and repeat Procedure 1. If the problem still occurs, go to Check 2.

Check 2 (One of) HDD(s) may be faulty. Replace it with a new one following the

instructions in Chapter 4, Replacement Procedures and check the operation. If the problem still occurs, perform Check 3.

Check 3 System board may be faulty. Replace it with a new one following the instructions

in Chapter 4, Replacement Procedures.

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2.7 Keyboard Troubleshooting 2 Troubleshooting Procedures

2.7 Keyboard Troubleshooting

To check if the computer’s keyboard is malfunctioning or not, follow the troubleshooting procedures below as instructed.

Procedure 1: Diagnostic Test Program Execution Check

Procedure 2: Connector and Replacement Check

Procedure 1 Diagnostic Test Program Execution Check

Execute the Keyboard Test (DIAGNOSTIC TEST) and Pressed key display test (ONLY ONE TEST) in the Diagnostic Program. Refer to Chapter 3, Tests and Diagnostics, for more information on how to perform the test program.

If an error occurs, go to Procedure 2. If an error does not occur, keyboard is functioning properly.

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2 Troubleshooting Procedures 2.7 Keyboard Troubleshooting

Procedure 2 Connector and Replacement Check

The connection of cable and board may be defective. Otherwise, they may be faulty. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures, and perform the following checks:

Check 1 Make sure keyboard cable is firmly connected to system board.

Keyboard

34-pin

CN3200

If the connection is loose, reconnect firmly and repeat Procedure 1. If the problem still occurs, go to Check 2.

Check 2 Keyboard may be faulty. Replace it with a new one following the instructions in

Chapter 4, Replacement Procedures. If the problem still occurs, perform Check 3.

Check 3 System board may be faulty. Replace it with a new one following the instructions

in Chapter 4, Replacement Procedures.

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2.8 Touch pad Troubleshooting 2 Troubleshooting Procedures

2.8 Touch pad Troubleshooting

To check if the computer’s touch pad is malfunctioning or not, follow the troubleshooting procedures below as instructed.

Procedure 1: Diagnostic Test Program Execution Check

Procedure 2: Connector and Replacement Check

Procedure 1 Diagnostic Test Program Execution Check

Execute the Touch pad test (ONLY ONE TEST) in the Diagnostic Program. Refer to Chapter 3, Tests and Diagnostics, for more information on how to perform the test program.

If an error occurs, go to Procedure 2. If an error does not occur, touch pad is functioning properly.

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2 Troubleshooting Procedures 2.8 Touch pad Troubleshooting

Procedure 2 Connector and Replacement Check

Check 1 Make sure the cable is firmly connected to system board.

Touch pad

CN3201

If the connection is loose, reconnect firmly and repeat Procedure 1. If the problem

still occurs, go to Check 2.

Check 2 Touch Pad or the cable may be faulty. Replace it with a new one following the

instructions in Chapter 4, Replacement Procedures. If the problem still occurs, perform Check 3.

Check 3 System board may be faulty. Replace it with a new one following the instructions

in Chapter 4, Replacement Procedures.

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2.9 Display Troubleshooting 2 Troubleshooting Procedures

2.9 Display Troubleshooting

To check if the computer’s display is malfunctioning or not, follow the troubleshooting procedures below as instructed.

Procedure 1: External Monitor Check

Procedure 2: Diagnostic Test Program Execution Check

Procedure 3: Connector and Cable Check

Procedure 4: Replacement Check

Procedure 1 External Monitor Check

Connect an external monitor to the computer’s external monitor port, then boot the computer. The computer automatically detects the external monitor.

If the external monitor works correctly, the internal LCD may be faulty. Go to Procedure 3.

If the external monitor appears to have the same problem as the internal monitor, system board may be faulty. Go to Procedure 2.

Procedure 2 Diagnostic Test Program Execution Check

The Display Test program is stored in Diagnostics disk. This program checks the display controller on system board. Insert the Diagnostics disk in the USB FDD, turn on the computer and run the test. Refer to Chapter 3, Tests and Diagnostics for details. If an error is detected, go to Procedure 3.

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2 Troubleshooting Procedures 2.9 Display Troubleshooting

Procedure 3 Connector and Cable Check

LCD Module is connected to system board by an LCD/FL cable. FL inverter board is also connected to system board by an LCD/FL cable. In addition, fluorescent lamp is connected to FL inverter board by HV cable. Their cables may be disconnected from system board or FL inverter board. Disassemble the computer following the steps described in Chapter 4, Replacement Procedures.

If the connection is loose, reconnect firmly and restart the computer. If the problem still occurs, go to Procedure 4.

Fluorescent lamp

LCD/FL cable

HV cable

CN3

CN1

CN2CN4

CN5000

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2.9 Display Troubleshooting 2 Troubleshooting Procedures

Procedure 4 Replacement Check

Fluorescent lamp, FL inverter, LCD module, HV cable and LCD/FL cable are connected to display circuits. Any of these components may be faulty. Refer to Chapter 4, Replacement Procedures, for instructions on how to disassemble the computer and then perform the following checks:

If fluorescent lamp does not light, perform Check 1.

If characters or graphics on the internal display are not displayed clearly, perform Check 4.

If some screen functions do not operate properly, perform Check 4.

If fluorescent lamp remains lit when the display is closed, perform Check 5.

Check 1 Replace fluorescent lamp with a new one following the instructions in Chapter 4,

Replacement Procedures and test the display again. If the problem still occurs, perform Check 2.

Check 2 LCD/FL cable may be faulty. Replace FL/LCD cable with a new one following

the instructions in Chapter 4, Replacement Procedure and test the display again. If the problem still occurs, perform Check 3.

Check 3 FL inverter may be faulty. Replace FL inverter with a new one following the

instructions in Chapter 4, Replacement Procedure and test the display again. If the problem still occurs, perform Check 4.

Check 4 LCD module may be faulty. Replace LCD module with a new one following the

instructions in Chapter 4, Replacement Procedure and test the display again. If the problem still occurs, perform Check 5.

Check 5 System board may be faulty. Replace it with a new one following the instructions

in Chapter 4, Replacement Procedure.

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2 Troubleshooting Procedures 2.10 Optical Disk Drive Troubleshooting

2.10 Optical Disk Drive Troubleshooting

To check if optical disk drive is malfunctioning or not, follow the troubleshooting procedures below as instructed.

Procedure 1: Diagnostic Test Program Execution Check

Procedure 2: Connector Check and Replacement Check

Procedure 1 Diagnostic Test Program Execution Check

Execute the CD-ROM/DVD-ROM Test in the Diagnostic Program. Refer to Chapter 3, Tests and Diagnostics for more information on how to perform the test program.

Prepare the tools before the test.

If any error is detected by the test, go to Procedure 2.

Procedure 2 Connector Check and Replacement Check

The connection may be defective among optical disk drive, ODD relay board, ODD flexible cable and system board. Otherwise, they may be faulty. Disassemble the computer following the steps described in Chapter 4 and perform the following checks:

Check 1 Make sure optical disk drive is firmly connected to the connector on system board.

50-pin

Optical disk drive

CN1820

CN9680

ODD flexible cable

CN1810

If the connection is loose, reconnect it firmly and return to Procedure 2. If the

problem still occurs, perform Check 2.

Check 2 Optical disk drive may be faulty. Replace it with a new one following the steps in

Chapter 4. If the problem still occurs, perform Check 3.

Check 3 ODD relay board may be faulty. Replace it with a new one following the steps in

Chapter 4. If the problem still occurs, perform Check 4.

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2.10 Optical Disk Drive Troubleshooting 2 Troubleshooting Procedures

Check 4 ODD flexible cable may be faulty. Replace it with a new one following the steps

in Chapter 4. If the problem still occurs, perform Check 5.

Check 5 System board may be faulty. Replace it with new one following the instructions

in Chapter 4.

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2 Troubleshooting Procedures 2.11 Modem Troubleshooting

2.11 Modem Troubleshooting

To check if modem is malfunctioning or not, follow the troubleshooting procedures below as instructed.

Procedure 1: Diagnostic Test Program Execution Check

Procedure 2: Connector Check and Replacement Check

Procedure 1 Diagnostic Test Program Execution Check

Execute Modem test in the LAN/Modem/Bluetooth/IEEE1394 test program. Refer to Chapter 3, Tests and Diagnostics for more information on how to perform the test program.

If any error is detected, perform Procedure 2.

Procedure 2 Connector Check and Replacement Check

MDC (Modem Daughter Card) is used as the modem for this computer. MDC is connected to SD board that is connected to system board. If modem malfunctions, The connection of cable, board and module may be defective. Otherwise, they may be faulty.

Disassemble the computer following the steps described in Chapter 4 and perform the following checks:

Check 1 Make sure the following connections are firmly connected.

CN3000

CN9510

CN9500

SD board Flexible cable

Modem jack

Modem cable

MDC

30-pin

CN3021

If any connector is disconnected, connect it firmly and return to Procedure 1. If the problem still occurs, perform Check 2.

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2.11 Modem Troubleshooting 2 Troubleshooting Procedures

Check 2 Modem cable may be faulty. Replace it with a new one. If the problem still occurs,

perform Check 3.

Check 3 MDC may be faulty. Replace it with a new one following the steps in Chapter 4.

If the problem still occurs, perform Check 4.

Check 4 SD board may be faulty. Replace it with a new one following the instructions in

Chapter 4. If the problem still occurs, perform Check 5.

Check 5 SD board flexible cable may be faulty between SD board and system board.

Replace it with a new one following the instructions in Chapter 4. If the problem still occurs, perform Check 6.

Check 6 System board may be faulty. Replace it with a new one following the instruction

in Chapter 4.

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Toshiba qosmio g20 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

Table of Contents

Chapter 1 Contents

1.3 2.5-inch Hard Disk Drive

1.6 TFT Color Display

Main battery

Chapter 2 Contents

2.5 USB FDD Troubleshooting

2.6 2.5” HDD Troubleshooting

2.8 Touch pad Troubleshooting