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IBM ThinkPad T23 2647, Supplementary Manual

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vi

ThinkPad

®

T23 Service and Troubleshooting Guide

Summary of Contents for ThinkPad T23 2647

Page 1: ...ThinkPad T23 Service and Troubleshooting Guide ...

Page 2: ...educe the risk of fire use only No 26 AWG or thicker telephone cable v The fluorescent lamp in the LCD contains mercury Do not put it in trash that is disposed of in landfills Rough handling or dropping the computer can cause the LCD to break and the internal fluid to get into your eyes or on your hands Immediately wash the affected areas with water If symptoms persist seek medical care v Do not o...

Page 3: ...hinkPad Find answers to your questions about your computer and view IBM Web sites by pressing the ThinkPad Button shown in the previous illustration to open Access ThinkPad your on board computer help center Copyright IBM Corp 2001 iii ...

Page 4: ...A quick way to search the help system Join an interactive community of ThinkPad users to access mobile resources read tips and true stories and share your own advice Customize your ThinkPad with accessories software and services A one click guide to service on the Web for your ThinkPad iv ThinkPad T23 Service and Troubleshooting Guide ...

Page 5: ... browsing the table of contents using the index or performing a search View help topics to learn how to v Use your computer hardware features v Connect to the internet or a local network v Set up a projector for your presentation v Use passwords and other security features v Install remove and recover software v Upgrade your system v Extend the life of your battery v Troubleshoot problems v Contac...

Page 6: ...brief video clips that show you how to perform certain tasks such as replacing your battery inserting a PC card or upgrading your memory Use the controls shown to play pause and rewind the video clip vi ThinkPad T23 Service and Troubleshooting Guide ...

Page 7: ...Getting help and service from IBM 33 Getting help and service 34 Getting help on the Web 34 Getting help by fax 35 Calling IBM 35 Appendix A Important safety instructions 39 Modem safety information 41 Laser compliance statement 42 Appendix B Product warranties and notices 45 Warranty Period 45 IBM Statement of Limited Warranty 45 Part 1 General Terms 45 Part 2 Country unique Terms 49 Notices 57 P...

Page 8: ...viii ThinkPad T23 Service and Troubleshooting Guide ...

Page 9: ...Chapter 1 Overview of your new ThinkPad computer Your ThinkPad at a glance 2 Features 3 Specifications 5 Caring for your ThinkPad computer 6 Copyright IBM Corp 2001 1 ...

Page 10: ...Your ThinkPad at a glance Front view Rear view Your ThinkPad at a glance 2 ThinkPad T23 Service and Troubleshooting Guide ...

Page 11: ...y The color display uses TFT technology v Size 13 3 or 14 1 inch depending on the model v Resolution LCD Up to 1400 by 1050 depending on the model External monitor Up to 1600 by 1200 v Brightness control Keyboard v 84 key 85 key or 89 key v TrackPoint v Fn key function v ThinkPad button v Volume control buttons v ThinkLight Features Chapter 1 Overview of your new ThinkPad computer 3 ...

Page 12: ...SO 9529 ECMA 125 External interface v Serial connector EIA RS232D v Parallel connector IEEE 1284A v External input device connector v External monitor connector v PC Card slots Type I Type II or Type III PC Card v Headphone jack v Line in jack v Microphone jack v Video out connector v Universal Serial Bus USB connectors v UltraPort connector v Infrared port v RJ11 telephone connector available if ...

Page 13: ...ove 2438 m 8000 ft Maximum operating temperature 31 3 C 88 F Note When you charge the battery pack its temperature must be at least 10 C 50 F v Relative humidity Operating with no diskette in the drive 8 to 95 Operating with a diskette in the drive 8 to 80 Heat output v 72 W 246 Btu hr maximum Electrical ac adapter v Sin wave input at 50 to 60 Hz v Input rating of the ac adapter 100 240 V ac 50 to...

Page 14: ...ocation from plastic bags v Keep your computer away from magnets activated cellular phones electrical appliances or speakers within 13cm 5 in v Avoid subjecting your computer to extreme temperatures below 5 C 41 F or above 35 C 95 F Be gentle with your computer v Avoid placing any objects including paper between the display and the keyboard or under the keyboard v Do not drop bump scratch twist hi...

Page 15: ...at setting a supervisor password can prevent unauthorized initialization Other important tips v Your computer modem might use only an analog telephone network or public switched telephone network PSTN Do not connect the modem to a PBX private branch exchange or any other digital telephone extension line because this could damage your modem Analog phone lines are often used in homes while digital p...

Page 16: ...ter reinstall the plastic bezel faces if supplied v Store your external and removable hard disk diskette CD and DVD drives in the appropriate containers or packaging when they are not being used Cleaning your computer Occasionally clean your computer as follows v Use a soft cloth moistened with nonalkaline detergent to wipe the exterior of the computer v Avoid spraying cleaner directly on the disp...

Page 17: ...A power switch problem 16 Keyboard problems 16 TrackPoint problems 17 Standby or hibernation problems 18 Computer screen problems 22 Battery problems 23 Hard disk drive problems 24 Other problems 24 Starting BIOS Setup Utility 27 Recover pre installed software 28 Upgrading the hard disk drive 30 Replacing the battery 32 Copyright IBM Corp 2001 9 ...

Page 18: ...e time to run the entire test do not interrupt the test while it is running The Quick Test set runs many tests of critical hardware components but it does not run all of the diagnostic tests in PC Doctor for Windows If PC Doctor for Windows reports that all of the tests in the Quick Test set have been run and that it has found no problems consider running more of the tests If you are preparing to ...

Page 19: ...he ac adapter to the computer and charge the battery or replace the battery with a fully charged one 0193 RF antenna has been removed The RFID antenna that you installed has been removed Enter the supervisor password to return your computer to the normal operation 0194 The computer is carried through the security gate The computer has been carried through the security portal gate Enter the supervi...

Page 20: ...the computer serviced 0230 Shadow RAM error The shadow RAM failed Test your computer s memory with PC Doctor If you added a memory module just before turning the computer on reinstall it Then test the memory with PC Doctor 0231 System RAM error The system RAM failed Test your computer s memory with PC Doctor If you added a memory module just before turning the computer on reinstall it Then test th...

Page 21: ...s Enter to use the computer If the power on password is not accepted a supervisor password might have been set Type the supervisor password and press Enter If you still see the same error message have the computer serviced The hard disk password prompt A hard disk password is set Type the password and press Enter to use the computer If you still see the same error message have the computer service...

Page 22: ...on password prompt and then type the correct password and press Enter If the power on password prompt does not appear the brightness level might be set to minimum brightness Adjust the brightness level by pressing the Fn Home If the screen still remains blank make sure that v The battery is installed correctly v The ac adapter is connected to the computer and the power cord is plugged into a worki...

Page 23: ...ThinkPad Configuration Program and click LCD then select the Screen expansion function The image might still look slightly distorted Note If your computer has a screen expansion function you can use the Fn F8 keys to expand the screen image A password problem Problem I forgot my password Solution If you forget your power on password you have to take your computer to an IBM reseller or marketing re...

Page 24: ...pad on your computer does not work Use the numeric keypad on the external keyboard If an external numeric keypad or a mouse is connected 1 Turn off the computer 2 Remove the external numeric keypad or the mouse 3 Turn on the computer and try using the keyboard again If the keyboard problem is resolved carefully reconnect the external numeric keypad external keyboard or mouse making sure that you h...

Page 25: ...ing the TrackPoint during normal operation This is a normal characteristic of the TrackPoint and is not a defect Cursor drifting might occur for several seconds under the following conditions v When the computer is turned on v When the computer resumes normal operation v When the TrackPoint is pressed for a long time v When the temperature changes Problem The cursor does not work for a while after...

Page 26: ...he computer automatically enters standby mode to allow the computer to cool and to protect the processor and other internal components Problem The computer enters standby mode immediately after Power On Selftest POST the standby indicator light turns on Solution Make sure that v The battery is charged v The operating temperature is within the acceptable range Refer to Specifications in this Guide ...

Page 27: ... take a long time The computer queries the Ethernet until the timeout timer stops the query If you want to access an Ethernet connect the network cable If you are not using the network disable the Ethernet port as follows For Windows 98 1 Double click the System icon in the Control Panel 2 Click the Device Manager tab 3 Double click Network Adapter 4 Double click Intel Pro 100 VE Network connectio...

Page 28: ...e whether a CD ROM is inserted there This prevents your computer from entering standby mode even after a timeout To enable the computer to enter standby mode do the following 1 Click Start 2 Move the cursor to Settings and Control Panel 3 Click Control Panel and then double click System 4 Click the Device Manager tab 5 Click the mark of CD ROM 6 Double click the name of the CD ROM or DVD ROM 7 Cli...

Page 29: ...button If you are using one of the IBM communication PC Cards the computer cannot enter hibernation mode To enter hibernation mode stop the communication program and then remove the PC Card or disable the PC Card slot using the Control Panel For Windows NT Note You must format your hard disk with the FAT format system to use hibernation mode in Windows NT If you format your hard disk with NTFS the...

Page 30: ...Display Properties window For Windows 98 or Windows 2000 1 Click the Settings tab 2 Check if the color depth and resolution are correctly set 3 Click Advanced 4 Click the Adapter tab 5 Make sure S3 Graphics Inc SuperSavage IXC SDR is shown in the Adapter Information window 6 Click the Monitor tab 7 Make sure the information is correct For Windows NT 1 Click the Settings tab 2 Check if the color de...

Page 31: ... running video playback DVD playback or game applications Solution Do either of the following v If you are using 32 bit color mode change the color depth to 16 bit mode v If you are using a desktop size of 1280x1024 or larger reduce the desktop size and the color depth Battery problems Problem The battery cannot be fully charged by the power off method in the standard charge time for your computer...

Page 32: ... hard disk drive makes a rattling noise intermittently Solution The rattling noise might be heard when v The hard disk drive starts accessing the data or when it stops v You are carrying the hard disk drive v You are carrying your computer This is a normal characteristic of a hard disk drive and is not a defect Problem The hard disk drive does not work Solution In the startup menu in IBM BIOS Setu...

Page 33: ...ever the message saying that Windows NT is loading remains on the screen Solution The USB setting might have been changed to Enabled If so it might cause a conflict in allocating memory resources during startup Disable the setting using the BIOS Setup Utility as follows 1 Turn your computer off and then on again then while the message Press F1 for IBM BIOS Setup Utility is displayed at the lower l...

Page 34: ... on how much the processor is used If the use increases Intel SpeedStep switches the processor speed to the lower speed To choose a mode do the following 1 Start the ThinkPad Configuration Program 2 Click Power Management 3 Click the Intel SpeedStep technology tab 4 From the list select the mode you want 5 Click OK Problem If you have been using Windows 2000 with the ThinkPad Dock attached to your...

Page 35: ...press F1 If you have set a supervisor password the IBM BIOS Setup Utility menu appears after you enter the password You can start the utility by pressing Enter instead of the supervisor password then however you cannot change any parameters that are protected by the supervisor password For more information refer to the on board help 4 Using the cursor keys move to an item you want to change When t...

Page 36: ...ram to restore your pre installed software do the following 1 Save all of your files and shut down your desktop 2 Turn off your computer 3 Turn on your computer Quickly press F11 when this message is displayed on the screen To start the Product Recovery program press F11 This message is displayed for only a few seconds Note If this message does not appear you can use a Recovery Repair diskette to ...

Page 37: ...u appears Note If you are prompted to select the operating system select one you want to recover Then the Product Recovery Program main menu opens 3 Select System Utilities from the main menu Press Enter 4 Select Create a Recovery Repair diskette Press Enter 5 Follow the on screen instructions 6 When the process is completed label your diskette as the Recovery Repair diskette and save it for futur...

Page 38: ...Do not apply pressure to the cover of the drive v Do not touch the connector The drive is very sensitive Incorrect handling can cause damage and permanent loss of data on the hard disk Before removing the hard disk drive make a backup copy of all the information on the hard disk and then turn the computer off Never remove the drive while the system is operating in standby mode or in hibernation mo...

Page 39: ...y install them 9 Turn the computer over so that its bottom side is up Reinstall the screw Note You can replace the coin screw with a security screw to prevent the hard disk drive from being removed easily The security screw may not be included in your ship group You can however purchase screw directly from NABS at www nabsnet com 10 Reinstall the battery 11 Turn the computer over again Connect the...

Page 40: ... 3 Slide the battery latch to the left to unlock it 1 then remove the battery 2 Note The first position of the battery latch is for releasing the lock of the battery 4 Align the side of a fully charged spare battery with the side of the battery space in the computer 1 then gently push the battery into the space 2 5 Slide the battery latch to the left to lock it 6 Turn the computer over again Conne...

Page 41: ...Chapter 3 Getting help and service from IBM Getting help and service 34 Getting help on the Web 34 Getting help by fax 35 Calling IBM 35 Copyright IBM Corp 2001 33 ...

Page 42: ...m directory or you can contact the IBM HelpCenter Some fees might apply Getting help on the Web On the World Wide Web the IBM Web site has up to date information about IBM Personal Computer products and support The address for the IBM Personal Computing home page is www ibm com pc IBM provides an extensive Web site dedicated to mobile computing and to ThinkPad computers at www ibm com pc support R...

Page 43: ...blem v IBM hardware repair If the problem is determined to be caused by IBM hardware under warranty trained service personnel are available to provide the applicable level of service v Engineering change management Occasionally there might be changes that are required after a product has been sold IBM or your reseller if authorized by IBM will make selected Engineering Changes ECs available that a...

Page 44: ...system Telephone numbers Note Telephone numbers are subject to change without notice For the latest list of IBM HelpCenter telephone numbers and hours of operation visit the Support Web site at www ibm com pc support Country or region Language Telephone Number Argentina Spanish 11 4717 4357 Australia English 1300 130 426 Austria German 01 54658 5060 Belgium Dutch French 02 714 35 70 02 714 35 15 B...

Page 45: ...tch 020 504 0501 New Zealand English 0800 446 149 Norway Norwegian 23 05 32 40 Peru Spanish 349 0050 Portugal Portuguese 21 791 51 47 Spain Spanish 91 662 4916 Sweden Swedish 08 751 52 27 Switzerland German French Italian 0848 80 52 52 Taiwan Mandarin 886 2 2725 9799 United Kingdom English 01475 555 055 United States English 1 800 772 2227 Getting help and service Chapter 3 Getting help and servic...

Page 46: ...Getting help and service 38 ThinkPad T23 Service and Troubleshooting Guide ...

Page 47: ...tion cables is hazardous To avoid shock hazard connect and disconnect cables as shown below when installing moving or opening the covers of this product or attached devices If the 3 pin power cord is provided with this product it must be used with a properly grounded outlet Copyright IBM Corp 2001 39 ...

Page 48: ...se it to water or rain v Do not attempt to disassemble it v Do not short circuit it v Keep it away from children Do not put the battery pack in trash that is disposed of in landfills When disposing of the battery comply with local ordinances or regulations and your company s safety standards DANGER If the backup battery is incorrectly replaced there is danger of explosion The lithium battery conta...

Page 49: ...lations The LCD is made of glass and rough handling or dropping the computer can cause the LCD to break If the LCD breaks and the internal fluid gets into your eyes or on your hands immediately wash the affected areas with water for at least 15 minutes if any symptoms are present after washing get medical care CAUTION To reduce the risk of fire use only No 26 AWG or larger thicker telephone cable ...

Page 50: ...the requirements of the Department of Health and Human Services 21 Code of Federal Regulations DHHS 21 CFR Subchapter J for Class I laser products at the date of manufacture In other countries the drive is certified to conform to the requirements of IEC825 and EN60825 for Class 1 laser products DANGER Do not open the optical storage drive unit no user adjustments or serviceable parts are inside Us...

Page 51: ... visible and invisible laser radiation when open Avoid direct eye exposure Do not stare into the beam or view it directly with optical instruments Save these instructions Appendix A Important safety instructions 43 ...

Page 52: ...44 ThinkPad T23 Service and Troubleshooting Guide ...

Page 53: ...y pack 1 year IBM Statement of Limited Warranty Z125 4753 06 8 2000 Part 1 General Terms This Statement of Limited Warranty includes Part 1 General Terms and Part 2 Country unique Terms The terms of Part 2 replace or modify those of Part 1 The warranties provided by IBM in this Statement of Limited Warranty apply only to Machines you purchase for your use and not for resale from IBM or your resell...

Page 54: ...PLACE ALL OTHER WARRANTIES OR CONDITIONS EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE THESE WARRANTIES GIVE YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM JURISDICTION TO JURISDICTION SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF EXPRESS OR IMPLIED WARRANTI...

Page 55: ... yours You represent that all removed items are genuine and unaltered The replacement may not be new but will be in good working order and at least functionally equivalent to the item replaced The replacement assumes the warranty service status of the replaced item Many features conversions or upgrades involve the removal of parts and their return to IBM A part that replaces a removed part will as...

Page 56: ...arges if recurring 12 months charges apply for the Machine that is subject of the claim For purposes of this item the term Machine includes Machine Code and Licensed Internal Code This limit also applies to IBM s suppliers and your reseller It is the maximum for which IBM its suppliers and your reseller are collectively responsible UNDER NO CIRCUMSTANCES IS IBM LIABLE FOR ANY OF THE FOLLOWING 1 TH...

Page 57: ...CIFIC AUSTRALIA The IBM Warranty for Machines The following paragraph is added to this Section The warranties specified in this Section are in addition to any rights you may have under the Trade Practices Act 1974 or other similar legislation and are only limited to the extent permitted by the applicable legislation Limitation of Liability The following is added to this Section Where IBM is in bre...

Page 58: ...ducted including all documents presented in such proceedings in the English language The number of arbitrators shall be three with each side to the dispute being entitled to appoint one arbitrator The two arbitrators appointed by the parties shall appoint a third arbitrator before proceeding upon the reference The third arbitrator shall act as chairman of the proceedings Vacancies in the post of c...

Page 59: ...xcluded or limited The Consumer Guarantees Act 1993 will not apply in respect of any goods which IBM provides if you require the goods for the purposes of a business as defined in that Act Limitation of Liability The following is added to this Section Where Machines are not acquired for the purposes of a business as defined in the Consumer Guarantees Act 1993 the limitations in this Section are su...

Page 60: ...btain warranty service for that Machine in any of those countries from either 1 an IBM reseller approved to perform warranty service or 2 from IBM If you purchase an IBM Personal Computer Machine in Albania Armenia Belarus Bosnia and Herzegovina Bulgaria Croatia Czech Republic Georgia Hungary Kazakhstan Kirghizia Federal Republic of Yugoslavia Former Yugoslav Republic of Macedonia FYROM Moldova Po...

Page 61: ...of Paris 4 Angola Bahrain Botswana Burundi Egypt Eritrea Ethiopia Ghana Jordan Kenya Kuwait Liberia Malawi Malta Mozambique Nigeria Oman Pakistan Qatar Rwanda Sao Tome Saudi Arabia Sierra Leone Somalia Tanzania Uganda United Arab Emirates United Kingdom West Bank Gaza Yemen Zambia and Zimbabwe this Agreement will be governed by English Law and disputes relating to it will be submitted to the exclu...

Page 62: ...oses of this item the term Machine includes Machine Code and Licensed Internal Code Applicability of suppliers and resellers unchanged FRANCE Limitation of Liability The following replaces the second sentence of the first paragraph of this Section In such instances regardless of the basis on which you are entitled to claim damages from IBM IBM is liable for no more than items 1 and 2 unchanged IRE...

Page 63: ...and resellers unchanged The following replaces the third paragraph of this Section Unless otherwise provided by mandatory law IBM and your reseller are not liable for any of the following items 1 and 2 unchanged 3 indirect damages even if IBM or your reseller is informed of their possibility SOUTH AFRICA NAMIBIA BOTSWANA LESOTHO AND SWAZILAND Limitation of Liability The following is added to this ...

Page 64: ...ection 2 of the Supply of Goods and Services Act 1982 Applicability of suppliers and resellers unchanged The following is added to the end of this Section IBM s entire liability and your sole remedy whether in contract or in tort in respect of any default shall be limited to damages 56 ThinkPad T23 Service and Troubleshooting Guide ...

Page 65: ...nk NY 10504 1785 U S A Processing date data This IBM hardware product and IBM software products that might be packaged with it have been designed when used in accordance with their associated documentation to process date data correctly within and between the 20th and 21st centuries provided all other products for example software hardware and firmware used with these products properly exchange ac...

Page 66: ...re of the following measures v Reorient or relocate the receiving antenna v Increase the separation between the equipment and receiver v Connect the equipment into an outlet on a circuit different from that to which the receiver is connected v Consult an IBM authorized dealer or service representative for help Properly shielded and grounded cables and connectors must be used in order to meet FCC e...

Page 67: ... a telephone fax machine unless such message clearly contains in a margin at the top or bottom of each transmitted page or on the first page of the transmission the date and time it is sent and an identification of the business or other entity or other individual sending the message and the telephone number of the sending machine or such business other entity or individual In order to program this...

Page 68: ...ure the equipment is not malfunctioning 7 No customer repairs are possible to the modem If you experience trouble with this equipment contact your Authorized Seller or the IBM Corporation for information 8 The modem may not be used on coin service provided by the telephone company Connection to party lines is subject to state tariffs Contact your state public utility commission or corporation comm...

Page 69: ...may give the telecommunications company cause to request the user to disconnect the equipment Users should ensure for their own protection that the electrical ground connections of the power utility telephone lines and internal metallic water pipe system if present are connected together This precaution may be particularly important in rural areas Caution Users should not attempt to make such conn...

Page 70: ...ilisateur doit s assurer que tous les fils de mise à la terre de la source d énergie électrique des lignes téléphoniques et des canalisations d eau métalliques s il y en a sont raccordés ensemble Cette précaution est particulièrement importante dans les régions rurales Avertissement L utilisateur ne doit pas tenter de faire ces raccordements lui même il doit avoir recours à un service d inspection...

Page 71: ...ce with Telecom s specifications v There shall be no more than 10 call attempts to the same number within any 30 minute period for any single manual call initiation v The equipment shall go on hook for a period of not less than 30 seconds between the end of one attempt and the beginning of the next attempt to the same number 6 Some parameters required for compliance with Telecom s Telepermit requi...

Page 72: ...wer mode the equipment shall be set to answer within 3 to 30 seconds of the receipt of ringing For the modem with approval number PTC 211 99 255 Not all phones connected to the phone port will respond to incoming ringing Do not report this as a fault unless the same phone will not respond to ringing when connected to a standard phone socket This equipment shall not be set up to make automatic call...

Page 73: ...ulties arise in such circumstances The code for Call Waiting disable is 52 on the Telecom New Zealand telephone network For the modem with approval number PTC 211 99 020 v The grant of a Telepermit for any item of terminal equipment indicates only that Telecom has accepted that the item complies with minimum conditions for connection to its network It indicates no endorsement of the product by Tel...

Page 74: ...within the limits for compliance with Telecom s specifications the software shall be set to ensure that calls are answered between 3 and 30 seconds of receipt of ringing v All persons using this device for recording telephone conversations shall comply with New Zealand law This requires that at least one party to the conversation is to be aware that it is being recorded In addition the Principles ...

Page 75: ...pean Union countries Hereby Ambit declares that this J07M041 00 modem is in conformity with the essential requirements and other relevant provisions of Directive 1999 5 EC Appendix B Product warranties and notices 67 ...

Page 76: ...ereby Intel declares that this PBA A30460 006 modem is in conformity with the essential requirements and other relevant provisions of Directive 1999 5 EC 68 ThinkPad T23 Service and Troubleshooting Guide ...

Page 77: ...clares that this 3CN3ACx556 3CN3ACx556B and 3CN3BM1556B modem models are in conformity with the essential requirements and other relevant provisions of Directive 1999 5 EC Appendix B Product warranties and notices 69 ...

Page 78: ...community and result from deliberations of panels and committees of scientists who continually review and interpret the extensive research literature In some situation or environment the use of High Rate Wireless LAN may be restricted by the proprietor of the building or responsible representatives of the organization These situations may for example include v Using High Rate Wireless LAN on board...

Page 79: ...tion of this ThinkPad wireless model at time of this manual s printing prohibits the use of any other Radio Frequency RF wireless device while the integrated wireless LAN card is in use The FCC certification requires that you disable the integrated wireless LAN device before you use any wireless PCMCIA cards or the Bluetooth option Please visit the IBM site at www ibm com pc support for an updated...

Page 80: ...e that may cause undesired operation of the device Permis d émission à faible puissance Cas des appareils de communications radio CNR 210 Le fonctionnement de ce type d appareil est soumis aux deux conditions suivantes 1 Cet appareil peut perturber les communications radio et 2 cet appareil doit supporter toute perturbation y compris les perturbations qui pourraient provoquer un dysfonctionnement ...

Page 81: ...d Windows NT are trademarks of Microsoft Corporation in the United States and or other countries Intel Pentium and SpeedStep are trademarks of Intel Corporation in the United States and or other countries For a complete list of Intel trademarks see www intel com tradmarx htm Other company product or service names may be the trademarks or service marks of others Appendix B Product warranties and no...

Page 82: ...74 ThinkPad T23 Service and Troubleshooting Guide ...

Page 83: ...hard disk problems 24 upgrading 30 hibernation problems 18 I IBM help iii K keyboard problems 16 O on board help iii P password problems 15 PC Doctor for Windows 10 power switch problems 16 problems troubleshooting 11 R recovering software 28 S safety instruction 39 standby problems 18 storage device upgrading 30 T telephone help by 35 testing with PC Doctor 10 ThinkPad Assistant iii TrackPoint pr...

Page 84: ...76 ThinkPad T23 Service and Troubleshooting Guide ...

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Page 86: ... Part Number 46P4564 1P P N 46P4564 ...

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