ibm thinkpad g40-hardware maintenance

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ThinkPad Computer Hardware Maintenance Manual

July 2005

This manual supports: ThinkPad G40, G41

Note Before using this information and the product it supports, be sure to read the general information under Notices on page 156.

First Edition (July 2005) Copyright Lenovo 2005. Portions Copyright International Business Machines Corporation 2005. All rights reserved. U.S. GOVERNMENT USERS RESTRICTED RIGHTS: Our products and/or services are provided with RESTRICTED RIGHTS. Use, duplication or disclosure by the Government is subject to the GSA ADP Schedule contract with Lenovo Group Limited, if any, or the standard terms of this commercial license, or if the agency is unable to accept this Program under these terms, then we provide this Program under the provisions set forth in Commercial Computer SoftwareRestricted Rights at FAR 52.227-19, when applicable, or under Rights in Data-General, FAR 52.227.14 (Alternate III).

ContentsAbout this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . 3 . 3 . 3 . 4 . 4 . 4 . 16 . 16 . 17 . 19 Introduction . . . . . . . . Important service information . . . . Strategy for replacing FRUs . . . How to use error messages . . . Diskette compatibility matrix . . . . Safety notices: multilingual translations . Safety information . . . . . . . General safety . . . . . . . Electrical safety . . . . . . Safety inspection guide . . . . Handling devices that are sensitive to discharge . . . . . . . Grounding requirements . . . . Laser compliance statement . . . . General descriptions . . . . Read this first . . . . . . . What to do first . . . . . Related service information . . . Service Web site . . . . . Restoring the preloaded system Passwords . . . . . . . Power management . . . . Checkout guide . . . . . . Testing the computer . . . . Detecting system information with Power system checkout . . . ThinkPad G40, G41 . . . . Product overview . . . . . Specifications . . . . . Status indicators . . . . FRU tests . . . . . . Fn key combinations . . . Symptom-to-FRU index . . . Numeric error codes . . . Error messages . . . . Beep symptoms . . . . No-beep symptoms . . . LCD-related symptoms . . Intermittent problems . . . Undetermined problems . . FRU replacement notices . . Screw notices . . . . . Retaining serial numbers. . Removing and replacing a FRU. 1010 Battery pack. . . . 1020 Hard disk drive . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . electrostatic . . . . . 20 . . . . . 21 . . . . . 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PC-Doctor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

25 25 25 28 28 28 30 33 35 35 37 38 43 45 45 47 49 51 52 52 56 58 58 59 60 60 61 61 62 65 66 67

Lenovo 2005. Portions IBM Corp. 2005.

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1030 DIMM door . . . . . . . . . 1040 DIMM . . . . . . . . . . 1050 Modem daughter card (MDC) . . . 1060 Backup battery . . . . . . . . 1070 Keyboard . . . . . . . . . 1080 Middle cover . . . . . . . . 1090 Hinge cover . . . . . . . . . 1095 FDD assembly . . . . . . . . 1100 Blank bezel FDD assembly . . . . 1110 VGA heatsink assembly . . . . . 1120 VGA card assembly . . . . . . 1130 CD-ROM/DVD drive and ODD bracket . 1140 Mini PCI adapter . . . . . . . 1150 PC card slot assembly . . . . . . 1160 LCD and Keyboard bezel assembly . . 1170 LCD assembly . . . . . . . . 1180 Keyboard bezel . . . . . . . . 1190 Fan assembly . . . . . . . . 2000 Fan (CPU 3 GHz) and CPU fixture . . 2010 CPU . . . . . . . . . . . 2020 CD-ROM/DVD drive bracket . . . . 2030 FDD bracket . . . . . . . . 2040 System board . . . . . . . . 2050 Lower case assembly . . . . . 2060 Modem cable . . . . . . . . 2070 PC card slot assembly . . . . . 2080 LCD front bezel . . . . . . . 2090 Inverter card . . . . . . . . 3000 Speaker assembly . . . . . . 3010 LCD cable assembly . . . . . . 3020 Wireless antenna and rear cover . . 3030 LCD panel and hinge assembly . . . Locations . . . . . . . . . . . . Front view . . . . . . . . . . . Rear view . . . . . . . . . . . Bottom view . . . . . . . . . . Parts list . . . . . . . . . . . . G40, G41 series . . . . . . . . . Overall . . . . . . . . . . . LCD FRUs . . . . . . . . . . Keyboard . . . . . . . . . . . Recovery CDs . . . . . . . . . Miscellaneous parts . . . . . . . . AC adapters . . . . . . . . . . Telephone cable . . . . . . . . . Optional FRUs . . . . . . . . . Common parts list . . . . . . . . Notices . . . . . . . . . . . . Trademarks . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. 69 . 70 . 71 . 72 . 73 . 75 . 76 . 77 . 78 . 79 . 80 . 81 . 82 . 83 . 86 . 89 . 92 . 94 . 96 . 98 . 99 . 100 . 101 . 102 . 103 . 104 . 105 . 106 . 107 . 108 . 110 . 111 . 112 . 112 . 113 . 114 . 115 . 115 . 139 . 146 . 149 . 150 . 153 . 153 . 153 . 154 . 154 . 156 . 158

iv

ThinkPad G40, G41

About this manualThis manual contains service and reference information for ThinkPad G40 and G41 products. Use this manual along with the advanced diagnostic tests to troubleshoot problems. The manual is divided into sections as follows: v The common sections provide general information, guidelines, and safety information required in servicing computers. v The product-specific section includes service, reference, and product-specific parts information.

Important This manual is intended for trained service personnel who are familiar with ThinkPad products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively. Before servicing ThinkPad products, be sure to review the safety information under Safety notices: multilingual translations on page 4, Safety information on page 16, and Laser compliance statement on page 21.

Lenovo 2005. Portions IBM Corp. 2005.

1

2

ThinkPad G40, G41

IntroductionImportant service informationImportant BIOS and device driver fixes are customer-installable. The BIOS and device drivers are posted on the customer support site http://www.lenovo.com/think/support Advise customers to contact the Customer Support Center at 800-426-7378 if they need assistance in obtaining or installing any diskette fixes. Customers in Canada should call the Customer Support Center at 800-565-3344 for assistance or download information.

Strategy for replacing FRUsBefore replacing parts Make sure that all software fixes are installed before replacing any FRUs listed in this manual. Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs: v If you are instructed to replace a FRU but the replacement does not correct the problem, reinstall the original FRU before you continue. v Some computers have both a processor board and a system board. If you are instructed to replace either the processor board or the system board, and replacing one of them does not correct the problem, reinstall that board, and then replace the other one. v If an adapter or device consists of more than one FRU, any of the FRUs may be the cause of the error. Before replacing the adapter or device, remove the FRUs, one by one, to see if the symptoms change. Replace only the FRU that changed the symptoms. Attention: The setup configuration on the computer you are servicing may have been customized. Loading Setup Defaults or replacing the system board may alter the settings. Note the current configuration settings (using the BIOS Setup Utility); then, when service has been completed, verify that those settings remain in effect.

Lenovo 2005. Portions IBM Corp. 2005.

3

Important service information

Strategy for replacing a hard disk driveAlways try to run a low-level format before replacing a hard disk drive. Attention: The drive startup sequence in the computer you are servicing may have been changed. Be extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect drive, data or programs can be overwritten.

How to use error messagesUse the error codes displayed on the screen to diagnose failures. If more than one error code is displayed, begin the diagnosis with the first error code. Whatever causes the first error code may also cause false error codes. If no error code is displayed, see if the error symptom is listed in the Symptom-to-FRU Index for the computer you are servicing.

Diskette compatibility matrixThe compatibility of each of the drives with the diskettes for it is as follows:Diskette drive 3.5-inch Diskette capacity 1.0 MB 2.0 MB 4.0 MB Compatibility Read and write Read and write Not compatible

Safety notices: multilingual translationsIn this manual, safety notices appear in English with a page number reference to the appropriate multilingual, translated safety notice found in this section. The following safety notices are provided in English, French, German, Hebrew, Italian, and Spanish.

4

ThinkPad G40, G41

Safety notices

Safety notice 1

Before the computer is powered on after FRU replacement, make sure all screws, springs, and other small parts are in place and are not left loose inside the computer. Verify this by shaking the computer and listening for rattling sounds. Metallic parts or metal flakes can cause electrical shorts. Avant de remettre lordinateur sous tension aprs remplacement dune unit en clientle, vrifiez que tous les ressorts, vis et autres pices sont bien en place et bien fixes. Pour ce faire, secouez lunit et assurez-vous quaucun bruit suspect ne se produit. Des pices mtal