Sharp VL-C8000S Technical Information Page 1

i

CAUTION:Do not disassemble, incinerate, or short-circuit the rechargeablebattery pack. Do not put it in refuse that is disposed of inlandfills. Dispo

Using the Mwave DSP Telephony FeaturesUsing the Telephony FunctionIn some countries, the Mwave telephony functions are available afterthe DAA/Telephon

Using the Mwave DSP Telephony FeaturesUsing the Mwave ModemThe Mwave data modem can be used with the Windows terminalemulator to access your favorite

Using the Mwave DSP Telephony Features2Double-click on the Modem 14400 icon.The Mwave modem starts automatically, and the followingmodem window appear

Using the Mwave DSP Telephony FeaturesModem 14400Mwave Data ModemThe Mwave telephony features support direct attachment to thepublic switched telephon

Using the Mwave DSP Telephony FeaturesCountry SelectionUsing the Country Selection Important Each country has restrictions to communicate when usingt

Using the Mwave DSP Telephony FeaturesMwave Fax ModemThe Mwave telephony features offer you the following fax functions:Call progress monitor Automat

Using the Mwave DSP Telephony FeaturesMwave Telephone Answering MachineNote: When you use the telephoneanswering machine function, refer tothe manual

Chapter 4. Using Battery PowerThis chapter provides information about battery-pack operations.Operating Time with the Battery Pack ... 92

Battery-Powered OperationOperating Time with the Battery PackThe battery pack is an internal power source for the computer.Note: * The operating time

Battery-Powered OperationCharging with the AC AdapterThe following procedure describes how to recharge the battery packwith the AC Adapter when the co

ContentsAbout This Book ... viiInformation Notices . . . . . . . . . . . . . . . . . . . . . . . . . . viiiTreatment of Icons

Battery-Powered OperationThe following tables show the approximate charging times for thebattery pack.When you use the lithium ion battery pack:When y

Replacing the Battery PackReplacing the Battery PackWarning: If you are using PC Cards, eitherconnect the AC Adapter, or stopthe PC Card application a

Using the Battery-Power Status IndicatorMonitoring the Battery-Power StatusYou can determine the battery condition through the battery-powerstatus ind

Using the Battery-Power Status IndicatorStatus Condition Action RequiredOff The batterypack is notinstalled. Thecomputer isturned off. Thecomputer

Using the Fuel-Gauge ProgramUsing the Fuel-Gauge ProgramNote: When you install an operatingsystem, you must also install theThinkPad Features program

Using the Fuel-Gauge ProgramOS/2WINFuel-Gauge Program for OS/2 and WindowsWhen you press the Fn+F2 key combination with OS/2 or Windows,the Fuel-Gauge

Using the Fuel-Gauge ProgramDischarging the Battery Pack for OS/2 and WindowsNote: The battery charging indicator startsblinking when discharging star

Using the Fuel-Gauge ProgramDOSFuel-Gauge Program for DOSWhen you press the Fn+F2 key combination with DOS, theFuel-Gauge program appears at the top-r

Using the Fuel-Gauge ProgramWhen operated with battery:When the computer is operating with battery power, the followingmessages alternately appear:Pow

Preserving Battery-Pack LifePreserving Battery-Pack LifeTo preserve the life of the battery pack:Do not charge it until all of its power is used.Once

Using the PC Card Director Program ... 62Using the Infrared Communication Feature ... 72Considerations for Communication ...

Maximizing the Battery-Powered OperationMaximizing Battery-Powered OperationTo save battery power effectively:Use Advanced Power Management (APM)Decre

Maximizing the Battery-Powered OperationWINWhen you use Windows, do the following to check and installAPM for Windows:1.Start the system. Make sure th

Maximizing the Battery-Powered OperationUsing Power-Saving ModesFor other ways to enter: Standby mode:Page 52. Suspend mode:Page 53.Enter standby

Maximizing the Battery-Powered OperationUsing Power-Saving OptionsNote: If you have installed an operatingsystem, make sure you also installthe ThinkP

Maximizing the Battery-Powered OperationThe following figure helps you determine how much power isnormally required for each computer feature, and how

Chapter 5. Protecting Your ComputerThis chapter provides information about how to protect yourcomputer and its internal devices.Using Passwords . . .

Using the Passwords Using PasswordsThere are three types of passwords you can use to protect yourcomputer and the removable hard disk drive:The power-

Using the PasswordsSetting a Power-On PasswordTo set power-on password, do the following:Easy-Setup:Page 42.1Start Easy-Setup and select the Password

Using the PasswordsChanging a Power-On PasswordYou must change your power-on password at the password prompt.You cannot change it after normal operati

Using the PasswordsRemoving a Power-On PasswordYou must remove your power-on password at the password prompt.You cannot remove it after normal operati

Reinstalling the Option Cover and Front Bezel ... 153Installing the DAA/Telephony Kit ... 155Attaching an External Numeric Keypad

Using the Passwords Hard-Disk PasswordThe hard-disk password helps protect the information stored on yourremovable hard disk drive. When this password

Using the PasswordsSetting a Hard-Disk PasswordTo set a hard-disk password, use Easy-Setup and do the following:To start Easy-Setup:Page 42.1Start Ea

Using the PasswordsChanging a Hard-Disk PasswordThe procedure to change a hard-disk password depends on whetheror not it is set the same as the power-

Using the PasswordsRemoving a Hard-Disk PasswordThe procedure to remove a hard-disk password depends on whetheror not it is set the same as the power-

Using the Passwords Supervisor PasswordThe supervisor password helps protect classified information. It:Secures the system information stored in Easy-

Using the PasswordsSetting a Supervisor PasswordTo set a supervisor password, do the following:To start Easy-Setup:Page 42.1Start Easy-Setup; then se

Using the PasswordsChanging a Supervisor PasswordDo the following to change your supervisor password:1Turn off the computer and wait at least 5 second

Using the PasswordsRemoving a Supervisor PasswordDo the following to remove the supervisor password:1Turn off the computer and wait at least 5 seconds

Using the PasswordsUsing the Hard-Disk and Power-On PasswordsYou can use a hard-disk password with a power-on password.When you turn on the computer,

Using the PasswordsUsing Several Hard Disk Drives with the Supervisor PasswordBecause the supervisor password automatically sets a hard-diskpassword,

Screen Messages . . . . . . . . . . . . . . . . . . . . . . . . . 206Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208General

Using the PasswordsChanging or Removing the Supervisor Password when UsingSeveral Hard Disk DrivesTo change or remove the supervisor password when usi

Using the Personalization Utility ProgramUsing the Personalization Utility ProgramOS/2WINYou can display personal information, such as your name oradd

Using the Personalization Utility ProgramNotes:1.Do not use the tab key whentyping your information. Usethe Spacebar instead to insertspace between te

Using the Personalization Utility Program5Create the background of your password-prompt screenas follows:a)Select the Paintbrush icon.b)Select Options

Using the Personalization Utility Program6Save your data using the Personalization editor ofThinkPad Features program as follows:a)Select the Personal

Using the Personalization Utility Program7Close all applications; then turn off the computer.8Insert the backup copy of the Utility Diskette into thed

Protecting Your Computer and Internal Devices Using LocksNote: You are responsible for theevaluation, selection, andimplementation of the lockingdevic

Protecting Your Computer and Internal DevicesUsing the Security LockTo prevent your computer from being removed without permission,purchase a Kensingt

Protecting Your Computer and Internal DevicesUsing the PC Card LockTo prevent the PC Cards from being removed from the PCMCIAslots, do the following.W

Chapter 6. Installing and Removing OptionsThis chapter provides information about how to install or removeexternal or internal devices and IBM options

Appendix E. Product Warranties and Notices ... 255Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261Trademarks . .

Installing and Removing PC CardsInstalling and Removing PC CardsThis section explains how to install and remove a PC Card. Forinformation about operat

Installing and Removing PC Cards2Insert the PC Card into an appropriate slot according toyour PC Card type:If you are using a Type I or Type II PC Car

Installing and Removing PC CardsYou have completed the installation of the PC Card. Refer to thefollowing sections:To use PC Cards, see “Using PC Card

Increasing Memory CapacityIncreasing Memory CapacityIncreasing memory capacity is an effective way to make programsrun faster. You can increase the am

Increasing Memory CapacityInstalling an IC DRAM Card and DIMM1Turn off the computer; then disconnect the AC Adapterand all cables from the computer.Wa

Increasing Memory Capacity6Place the adhesive strap 1 on the card as shown.This strap is used to remove the card.Warning: Do not insert any PC Card

Increasing Memory CapacityNote: Be sure to save the base plate forfuture use.9Pinch the levers 1 on the left side of the base plate2 and pull the p

Increasing Memory CapacityWarning: To avoid damaging the DIMM, donot touch its contact edge.11Insert the DIMM into either of the sockets on the DIMMad

Increasing Memory CapacityWarning: The diskette drive is a verydelicate device. Do not press onthe middle of the diskette drive.Otherwise, the drive h

Increasing Memory CapacityRemoving the IC DRAM Card and DIMM1Turn off the computer; then disconnect the AC Adapterand all cables from the computer.War

xvi IBM ThinkPad 755CX User's Guide

Increasing Memory Capacity6Remove the IC DRAM card by pulling the adhesivestrap 1 .7Go to step 12 on page 147.144 IBM ThinkPad 755CX User's Guid

Increasing Memory CapacityWarning: To avoid damaging the DIMM, donot touch its contact edge.8Press the locks on both edges of the socket at the sameti

Increasing Memory CapacityNote: The base plate should have beenremoved and stored when youinstalled the DIMM adapter.10Pinch the levers 1 on the lef

Increasing Memory CapacityWarning: The diskette drive is a verydelicate device. Do not press onthe middle of the diskette drive.Otherwise, the drive h

Replacing the Hard Disk DriveReplacing the Hard Disk DriveThe capacity of the hard disk can be increased by replacing theoriginal hard disk drive with

Replacing the Hard Disk Drive5Insert the replacement drive. Press on the shaded area1 as shown until the drive snaps into the connector;then close th

Installing Options in the Diskette Drive CompartmentInstalling Options in the Diskette Drive CompartmentYou might need to remove the option cover and

Installing Options in the Diskette Drive Compartment5Push the option cover from the bottom of the computerand remove it.6Insert a coin between the dis

Installing Options in the Diskette Drive Compartment7Push the bezel from the bottom of the computer andremove it.8Refer to the manual that came with t

Installing Options in the Diskette Drive CompartmentReinstalling the Option Cover and Front BezelTo reinstall the option cover (on the side of the com

Chapter 1. Getting StartedWelcome to the world of ThinkPad computers!The IBM ThinkPad 755CX is one of the most advanced computersfor your mobile compu

Installing Options in the Diskette Drive CompartmentTo reinstall the diskette drive bezel (on the front of thecomputer), do the following:Insert the l

Installing the DAA/Telephony KitInstalling the DAA/Telephony KitNote: In some countries, the Mwavetelephony functions are availableafter the DAA/Telep

Installing the DAA/Telephony Kit3Slide the latch 1 to the left-most position and releasethe dummy plug.4Remove the dummy plug 2 from the computer.

Installing the DAA/Telephony Kit5Make sure the latch is at the left-most position; theninstall the new plug with the round receptacle and firmlypress

Installing the DAA/Telephony Kit7Connect the cables: DANGER To avoid shock hazard, do not connect thetelephone cable to or disconnect it from thecompu

Attaching an External Numeric Keypad or a MouseAttaching an External Numeric Keypad or a MouseWarning: When you connect a mouse otherthan IBM PS/2 Min

Attaching an External Numeric Keypad or a MouseUsing the Mouse and Other Pointing DevicesNote: The appropriate software must havebeen loaded already.A

Attaching an External Numeric Keypad or a MouseUsing a Mouse on the IBM ThinkPad Space Saver KeyboardYou can use the IBM ThinkPad Space Saver Keyboard

Attaching an External Numeric Keypad or a MouseUsing the Device Driver on the Utility DisketteOS/2WINDOSWhen you use the Space Saver Keyboard, the dev

Attaching an External KeyboardAttaching an External KeyboardYou can connect an external keyboard to your computer through thekeyboard/mouse connector

Getting StartedAbout the Product MapThe Product Map is a foldout diagram that you will see first whenyou unpack the computer. Using the Map will help

Attaching a PrinterAttaching a PrinterMost parallel printers with the standard Centronics** interface can beattached to the 25-pin parallel connector

Attaching and Replacing an External DisplayAttaching an External DisplayNote: When installing an operatingsystem, you must install the displaydriver b

Attaching and Replacing an External DisplayChanging the Display ModeYou can display information on the LCD, the external display, or bothby using the

Attaching and Replacing an External DisplaySetting the Monitor Type and the Display DriverBefore attaching the external display to your computer, set

Attaching and Replacing an External DisplayHints and TipsWhen you are using Windows, the virtual screen function is available. Itis used to display a

Attaching and Replacing an External DisplayConnecting the External Display to the ComputerWarning: Do not disconnect the externaldisplay while the com

Attaching and Replacing an External DisplayChanging the Screen Resolution or Color DepthTo change the screen resolution or color depth of the external

Attaching and Replacing an External DisplayUsing SVGA Display DriversThe computer can display information on the attached SVGA displayaccording to you

Attaching the IBM Dock I or Dock IIAttaching the IBM Dock I or Dock IIWarning: Do not use the Utility Diskettethat came with the IBM Dock II.To expand

Chapter 7. Installing SoftwareThis chapter provides information about the software installed in thecomputer. It also describes how to install the nece

Getting Started1 The keyboard template showsfunction-key assignments whenplaced on the keyboard.2 The power cord connects the ACAdapter to the elect

Software ConsiderationsWhat You Need for Your ComputerThe operating systems supported by the computer are:IBM DOS Version 7.0 or laterIBM DOS Version

Software ConsiderationsThe following figure shows what must be installed for each operatingsystem before you begin computer operation:Page Numbers:For

Installing the Operating SystemInstalling the Operating SystemRefer to the appropriate section in the following to install youroperating system.OS/2IB

Installing the Operating SystemWINMicrosoft Windows Version 3.11 or LaterWindows operates in a DOS environment. Install DOS Version 7.0or later (see t

Installing the Operating SystemNote: Verify that Computer has changedto MS-DOS System with APM.Ifthe item has not changed, return tostep 1d.Windows Se

Installing the Operating System3When you have completed the installation of WindowsVersion 3.11, edit the AUTOEXEC.BAT file so that thecomputer will u

Installing the ThinkPad Features ProgramInstalling the ThinkPad Features ProgramWhen installing an operating system, you must install the ThinkPadFeat

Installing the ThinkPad Features ProgramDOSInstalling for DOSTo install the ThinkPad Features program for DOS, do the following:1Turn on the computer

Installing the ThinkPad Features ProgramWINInstalling for WindowsIf you are going to use Windows, install the ThinkPad Featuresprogram for DOS first (

Installing the PCMCIA Device DriverInstalling the PCMCIA Device DriverNote: Do not install the Phoenix**PCMCIA support for IBM DOS 7.0.PC Card Directo

Note Before using this information and the product it supports, be sure to read the general information underAppendix E, “Product Warranties and No

Getting StartedOther Symbols on the Product MapThis section describes the slots, connectors, and options that areshown on the Product Map. To install

Installing the PCMCIA Device DriverFor IBM DOS Version 7.0 or later:Only for DOS.Only for Windows.Software File Name How to InstallCard Services IBMDO

Installing the PCMCIA Device DriverOS/2Installing for OS/2To install the PCMCIA device driver for OS/2, do the following:1Turn on the computer and sta

Installing the PCMCIA Device DriverDOSInstalling for DOSTo install the PCMCIA device driver for DOS, do the following:1Turn on the computer and start

Installing the PCMCIA Device DriverWINInstalling for WindowsTo install the PCMCIA device driver for Windows, do the following:1Turn on the computer an

Installing the ThinkPad Display DriverInstalling the ThinkPad Display DriverThe display driver provides a high-resolution mode for an attachedSVGA dis

Installing the ThinkPad Display DriverOS/2Installing for OS/2 WarpRefer to the documentation that came with the display driverdiskette for OS/2 Warp.

Installing the ThinkPad Display DriverNote: To shut down OS/2:1.Move the mouse pointer to ablank part of your OS/2Desktop.2.Press the right button of

Installing the ThinkPad Display DriverWINInstalling for WindowsIf you did not install the display driver when Windows was installed(by following the p

Installing the Mwave Support SoftwareInstalling the Mwave Support SoftwareNote: If you have multiple operatingsystems, you might need to installmultip

Installing the Mwave Support SoftwareNote: To shut down OS/2:1.Move the mouse pointer to ablank part of your OS/2Desktop.2.Press the right button of y

Getting Started1 The serial connector is where youconnect a 9-pin, serial-device cable.2 The parallel connector is whereyou usually connect aparalle

Installing the Mwave Support SoftwareDOSInstalling for DOSTo install the Mwave support software for DOS, do the following:1Turn on the computer.2Inser

Installing the Mwave Support SoftwareWINInstalling for WindowsWarning: Before you install the Mwavesupport software, close all openapplications.To ins

Installing the Infrared Device DriverInstalling the Infrared Device DriverWhen installing an operating system, you must install the IR(infrared) devic

Installing the Infrared Device DriverWINInstalling for Windows1Turn on the computer; then go to the DOS commandprompt.2Insert the Infrared Features Di

Installing the Infrared Device Driver198 IBM ThinkPad 755CX User's Guide

Chapter 8. Solving Computer ProblemsComputer problems can be caused by software, hardware, or both.Many problems can be diagnosed and solved with the

What If Your Computer Does Not Work?Commonly Asked Problems and ActionsThis section provides a list of possible common problems that youmight have wit

What If Your Computer Does Not Work?P:The PC Card modem does not work.A:Do the following:1.Start the PC Card Director and check the serial port name(C

What If Your Computer Does Not Work?Testing the Computer1Turn on the computer.The power-on self-test (POST) runs automatically. If the testends withou

What If Your Computer Does Not Work?HDD-2SystemBoard Memory DisplayHDD-1 FDD-1PCMCIA-2ParallelPCMCIA-1FDD-2CD-ROMSerial DSPRestartStart111222If the co

Getting StartedSetting Up Your ComputerYou are now ready to assemble and start your computer. Thefollowing steps will guide you through the process.Th

What If Your Computer Does Not Work? Troubleshooting ChartsIn the charts, x can be any character. LCD ProblemsProblem ActionThe screen is blank andthe

What If Your Computer Does Not Work?Problem ActionThe screen imageappears smaller than theLCD size (using a DOSapplication on a 755CXSVGA model only).

What If Your Computer Does Not Work? Screen MessagesMessage ActionDiskette and F1 prompts.F2F10F1Verify that hard disk drive is correctly installed. O

What If Your Computer Does Not Work?Message ActionPOST error prompt. An error was found during the POST. Press Enter; then select Start from thetest m

What If Your Computer Does Not Work? Error CodesScreen Message ActionI9990301I9990302I9990305Note: Incorrectconnection of the harddisk drive can caus

What If Your Computer Does Not Work?Screen Message Action184 The entered password is invalid. Turn off the computer and wait at least 5seconds; then t

What If Your Computer Does Not Work? General ProblemsProblem Cause or ActionThe computerperformance is gettingworse in an environmentwhere the tempera

What If Your Computer Does Not Work?What If Testing Cannot Find the Problem?If the test programs do not find the problem, use the following troublesho

What If Your Computer Does Not Work?Problem ActionThe battery pack cannotbe fully charged in 3hours by the power-offcharging method.The battery pack i

What If Your Computer Does Not Work?Diskette Drive ProblemsMwave DSP Feature ProblemsProblem ActionThe diskette drive in useindicator stays on.If ther

Getting Started2RightSide View211221331 Chapter 1. Getting Started 7

What If Your Computer Does Not Work?Infrared Communication ProblemsProblem Cause and actionOther problems. The following is a list of failures that ca

What If Your Computer Does Not Work? Software Problems Option ProblemsProblem ActionAn application programdoes not work correctly.To determine if a pr

What If Your Computer Does Not Work?Keyboard, External Numeric Keypad, and Pointing Device ProblemsProblem ActionThe PC Card does notwork.Verify that:

What If Your Computer Does Not Work?Problem ActionThe mouse or pointingdevice does not work.Verify that the mouse or pointing-device cable is securely

What If Your Computer Does Not Work?External Display ProblemsProblem ActionThe screen is blank. Verify that:The power cord for the external display is

What If Your Computer Does Not Work?Problem ActionWhen you use DOS Shellor some kind ofapplication in the DOSenvironment, the lines onthe screen are d

What If Your Computer Does Not Work? Printer Problems Intermittent ProblemsProblem ActionThe printer does not work. Verify that:The printer is turned

Getting ServiceListing Installed OptionsWhen getting service, you might need to know which options youhave in your system. Check or write the names of

Getting ServiceRecording Identification NumbersThe following information is needed when obtaining repair services:The machine type and serial number

Getting Service Getting ServiceIf you need further assistance, call your IBM authorized reseller orIBM marketing representative.When requesting servic

Getting Started4Connect the AC Adapter as shown.5Position the speaker volume control to “3.”6Push and release the power switch to turn on thecomputer.

Getting ServiceThe IBM HelpClub: Another Great Choice (for EuropeanCountries)Yours for a free trial period. HelpwareWhat's great about the HelpCl

Getting ServiceJoin the HelpClub!Call your country number below during office hours:Austria 222 21145 7575Belgium 02/542.5360Denmark 45 93 45 45 loka

Getting Service226 IBM ThinkPad 755CX User's Guide

Appendix A. Avoiding Hardware ConflictsWhen options such as the AT adapter or application programs areinstalled, the system might not operate correctl

Avoiding Hardware Conflicts The following table summarizes the reserved system resources forthe computer and the ThinkPad Dock I or Dock II. Values in

Avoiding Hardware Conflicts System Resources IRQMemoryAddress (Hex) I/O Address (Hex)DMAChannelOptions in Dock I orDock IISCSI controller2, 3, 4, 5,

Avoiding Hardware Conflicts 230 IBM ThinkPad 755CX User's Guide

Appendix B. Advanced Information for PC CardsThis appendix describes the Auto Configurator program, whichautomatically enables the PC Card without the

Advanced Information for PC Cards Example When a Modem Card Is UsedWhen a modem card is installed in the PC Card slot, the AutoConfigurator assigns in

Advanced Information for PC Cards Example of the Memory Area for the Card Services and 3270Notes:1.The Auto Configurator for OS/2supports modem and da

Getting Started2314567 Chapter 1. Getting Started 9

Advanced Information for PC Cards Operational Considerations for PCMCIAConsider the following according to your operating system:OS/2Software Consider

Advanced Information for PC Cards DOSSoftware Considerations for DOSKeep in mind the following considerations when using PC Cards:Using a Software EMS

Advanced Information for PC Cards Note: The procedure assumes that youare using “EMS386.EXE” as anEMS device driver.The following example shows the pr

Advanced Information for PC Cards Note: For more information, see Chapter 5of the Dock I User's Guide.This maximizes the memory address range tha

Advanced Information for PC Cards For the preceding example, the memory map will be as follows:C000:0C300:0C400:0C800:0CC00:0CE00:0D000:0E000:03270sha

Advanced Information for PC Cards Rule 1 For you to use the software EMS driver (EMM386.EXE) withthe PCMCIA drivers, the “X=” parameter must be specif

Advanced Information for PC Cards DOSReleasing the PCMCIA Memory AreaNote: These procedures do not apply tothe device drivers supplied with yourPC Car

Advanced Information for PC Cards Note: See the sections in the DOS User'sGuide about using the DOSoperating system and configuringyour system us

Advanced Information for PC Cards WINSoftware Considerations for WindowsIf you are using Windows, specify the memory area for Windows soit does not co

Appendix C. Additional Information for Mwave DSP FeatureNote: In some countries, the Mwavetelephony functions are availableonly after the DAA/Telephon

Getting Started10 IBM ThinkPad 755CX User's Guide

Advanced Information for Audio Function Mwave MIDI OverviewMwave MIDI Synthesizer OverviewThe Mwave audio features can be a music synthesizer, creatin

Advanced Information for Audio Function simultaneous voices (8 notes at once, each of which can come froma different instrument). An EXTENDED Multitim

Advanced Information for Audio Function Pan The Mwave feature's MIDI synthesizer uses QSoundto implement pan. By using QSound, the position ofeac

Additional Information for Telephony Function Telephony InformationThis section provides additional information about the ThinkPadtelephony features.

Additional Information for Telephony Function 248 IBM ThinkPad 755CX User's Guide

Appendix D. Features and SpecificationsThis appendix describes features and specifications for the computer.For more information, refer to the Technic

Features and Specifications PCMCIA slots (accept two Type I or Type II PC Cards, or oneType III PC Card) Headphone jackMicrophone/line-in jack (suppo

Features and Specifications SpecificationsSize Width: 297 mm (11.7 in.) Depth: 210 mm (8.3 in.) Height: 49.8 mm (1.96 in.)WeightMinimum configurat

Features and Specifications IBM Power CordsFor your safety, IBM provides a power cord with a groundedattachment plug to use with this IBM product. To

Features and Specifications IBM PowerCordPart Number Used in These Countries25H2205 Argentina, Australia, New Guinea, New Zealand,Papua, Paraguay, Uru

Chapter 2. Getting Familiar with Your ComputerThis chapter provides general information about your computer.Locations and Functions ...

Features and Specifications Diskette StandardsTo get the best performance from your diskette drives, usehigh-quality diskettes (such as IBM diskettes

Appendix E. Product Warranties and NoticesStatement of Limited WarrantyThe warranties provided by IBM in this Statement of Limited Warranty apply only

Warranties and Notices When a type of service involves the exchange of a Machine or part, the item IBM oryour reseller replaces becomes its property a

Warranties and Notices This warranty gives you specific legal rights and you may also have other rights whichvary from jurisdiction to jurisdiction.

Warranties and Notices Statement of Limited WarrantyThe warranties provided by IBM in this Statement of Limited Warranty apply only toMachines you ori

Warranties and Notices When a type of service involves the exchange of a Machine or part, the item IBM oryour reseller replaces becomes its property a

Warranties and Notices This warranty gives you specific legal rights and you may also have other rights whichvary from jurisdiction to jurisdiction.26

Warranties and Notices NoticesReferences in this publication to IBM products, programs, or servicesdo not imply that IBM intends to make these availa

Warranties and Notices Pentium Intel CorporationPhoenix Phoenix Technologies, Ltd.PRODIGY Prodigy Services, Inc.QSound QSound, Inc.Sharp Sharp Corpora

Warranties and Notices Electronic Emission NoticeFederal Communications Commission (FCC) StatementPart 15 of the FCC RulesNote: This equipment has bee

Locations and FunctionsLocations and FunctionsThis section provides additional useful information about yourcomputer.FrontView124635789121113141010151

Warranties and Notices (5.0). To be certain of the number of devices you may connect to your line, asdetermined by the REN, you should call your local

Warranties and Notices Installation and Operating Instructions Addendum for UnitedKingdom UsersUsers of the IBM ThinkPad 755CX modem function in the U

Warranties and Notices Approved UsageThe modem is approved only for use with the following facilities:Storage of telephone numbers for retrieval by a

Warranties and Notices Storage of Numbers1. It is advisable to check the telephone numbers stored in your modemimmediately after programming, and also

Warranties and Notices Repeat Attempts: Number of Attempts and Durations between Attempts Minimum Duration between Call Attempts for Call PatternCall

GlossaryThis glossary includes terms anddefinitions from the IBM Dictionary ofComputing (New York: McGraw-Hill,1994).ac. Alternating current.ac power

Glossary directory. A type of file containing thenames and controlling information forother files or other directories.DMA. Direct memory access. Th

input/output units; it transmits data 1 byteat a time.partial suspend mode. A kind ofsuspend mode where only a part of thesystem components uses pow

272 IBM ThinkPad 755CX User's Guide

IndexAAC Adapter 18cable, wrapping 19connecting 8voltage 18answering machine 90APM (Advanced PowerManagement) 104installing for Windows 177AT bus 2

Locations and Functions1 The color LCD screen, whichuses a thin film transistor (TFT)technology, displays thecomputer output and can bemoved to any de

diskette drive (continued)bezelinstalling 154removing 150in use, indicator 16installing other options 150location 15problems 213removing 138disk

hard-disk password (continued)setting 115using 114with power-on password 122with supervisor password 122wrong hard-disk password,entering 114hardw

microprocessor (continued)machine specifications 249speed 37MIDIoverview 244support 75modem 84PC Cardinstalling 134removing 136problems 213mod

password (continued)Easy-Setup 44hard-disk passwordchanging 116power-on password, usingwith 122removing 117setting 115using 114wrong, entering

problems (continued)intermittent 220keyboard 216LCD 28, 204messages on screen 206modem 213Mwave DSP function 213options 215pointing device 216pr

software (continued)EMS, specifying 235problems 215Sound Blaster support 75speaker (built-in)location and functionspeaker indicator 16specifications

Vvideo device driverSee display driverVideo Features Diskette 3virtual screen 38volume controllocation and function 13Wwarranties and notices, produc

Thank You for Selectingan IBM ThinkPad 755CX ComputerThe IBM ThinkPad 755CXis one of the most advanced and versatile notebook computers.With such inn

Locations and FunctionsInsideViewRearViewBottomView614 IBM ThinkPad 755CX User's Guide

Locations and FunctionsInside View1 The modem/fax port releaselatch releases the modem/faxport from the computer.(See page 155.)2 The removable disket

System-Status Indicators System-Status IndicatorsThe system-status indicators show the current status of yourcomputer by their on or off states or by

System-Status IndicatorsSymbol Color Meaning7 Numeric lock Green Indicates that the numeric keypad on the keyboard is enabled. Thekeypad is enabled a

Providing Power Providing PowerYour computer can be operated with the AC Adapter, battery pack,or Car Battery Adapter (available as an option). AC Ada

Providing PowerTo Wrap and Fasten the AC Adapter CableWhen you carry the AC Adapter with your computer, you canwrap and fasten the cable as follows:11

Providing Power Battery PackThe battery pack is an internal power source for the computer whenthe AC Adapter is not available. The battery pack can be

Providing PowerNickel Metal Hydride Battery PackThe following table shows the operating time of the computer with afully charged nickel metal hydride

Providing PowerFor Your InformationStandby Battery:Your computer has another rechargeablebattery, called the standby battery.It supplies the necessary

Using the TrackPoint IIIOperating with the TrackPoint IIINote: No other software is required for theTrackPoint III; it works with thePS/2 mouse driver

Distinctive System FeaturesConfigRestartTrackPoint IIITFT Color LCD ScreenSecurity FeaturesFn Key FunctionPower ManagementThinkPad FeaturesProgramPCM

Using the TrackPoint IIIIf you are not familiar with the TrackPoint III, these instructions willhelp you get started:Note: Remember that the stick doe

Using the TrackPoint IIIChanging the CapThe cap 1 on the end of the TrackPoint III is removable. You canreplace it with one of the spares shipped wit

Operating the Numeric KeypadOperating the Numeric KeypadThe keyboard has some keys that, when enabled, work as if theywere a 10-key numeric keypad. (T

Using the DisplayUsing the DisplayThe LCD of your computer supports the following video mode foreach model:The 755CX SVGA model supports VGA (640-by-4

Using the DisplayUsing a DOS Application with Your 755CX SVGA ModelWhen you use a DOS application that supports only VGA mode(640-by-480 resolution) w

Using the Online BookUsing the Online BookNotes:The online book is not availablein all countries.The online book is availableonly when the operating s

Keeping the Computer from Being DamagedKeeping the Computer from Being DamagedDo not apply shock to your computer.Do not place anything heavy on your

Carrying the ComputerCarrying the ComputerWhen carrying your computer, follow these instructions to preventpossible damage to your computer and data:N

Carrying the Computer32 IBM ThinkPad 755CX User's Guide

Chapter 3. Operating Your ComputerThis chapter provides information about the use of your computer.What Happens When Power Is Turned On? ...

1 Mwave DSP audio, telephony, and fax/modem featuresThe ThinkPad Mwave digital signal processor (DSP) provides high-quality audio, telephony and mode

What Happens after Power-On?What Happens When Power Is Turned On?One of the following prompts appears when the computer is turned on:An operating syst

Using the ThinkPad Features ProgramUsing the ThinkPad Features ProgramTo install the ThinkPadFeatures program:Page 180.ThinkPad Features is a program

Using the ThinkPad Features ProgramOS/2WINUsing the Program for OS/2 and WindowsWhen you use OS/2 or Windows, a graphical presentation isavailable in

Using the ThinkPad Features ProgramPowerPower MenuWhen you select this icon, you can set power-saving options:Power Mode for battery operation and AC

Using the ThinkPad Features ProgramDisplayDisplay MenuThe display menu allows you to make selections for the computerdisplay. Display devicesYou can

Using the ThinkPad Features ProgramThinkPad SetupThinkPad Setup MenuThis menu allows you to view or set the following: System InfoThis shows you the

Using the ThinkPad Features ProgramFuelThe Fuel-Gauge program shows you the following battery-powerinformation:Remaining power percentageCurrent power

Using the ThinkPad Features ProgramOS/2WINDOSUsing the PS2 ProgramNote: To use the PS2 program in OS/2,you need to install the programusing the same p

Using Easy-Setup Using Easy-SetupWarning: Do not enter suspend mode whenusing Easy-Setup.The computer has a built-in system setup function calledEasy-

Using Easy-SetupConfigConfig contains the following:Memory Keyboard SerialParallelSystemBoardInitializeExitMemoryMemory shows the amount of installed

vi IBM ThinkPad 755CX User's Guide

Using Easy-SetupDate/TimeDate/Time is used to set the current date and time.23:59:591995.03.31Select any field (Year, Month, Date, Hour, Minute, or Se

Using Easy-SetupStart123Start up is used to change the startup sequence of your computer.34HDD-3 HDD-4PCMCIANote: For more information about thestartu

Using Easy-SetupRestartClick on Restart to restart the computer after you have made yourselections. Then press Enter or click on OK.46 IBM ThinkPad 75

Using Easy-SetupUsing the Selectable Drive-Startup SequenceWarning: If you change your startupsequence, you must be extremelycareful when you do write

Using the Fn Key FunctionUsing the Fn Key FunctionThe Fn key function allows you to change operational featuresinstantly. When you use the following f

Using the Fn Key FunctionKey Combination Feature MeaningFn + F8Reserved —Fn + F9Reserved —Fn + Reserved —Fn + Power modeswitchingWhen this key comb

Using Power ManagementUsing Power ManagementTo use the ThinkPadFeatures program:Page 35.The computer supports the following power-saving modes as abui

Using Power ManagementPower-saving-modes→Standby Suspend HibernationTime requiredto return tonormaloperation.Amount ofpowerconsumption.The following f

Using Power Management Standby ModeIn standby mode, the hard disk drive stops and the LCD turns off tosave power. When any key is pressed, the compute

Using Power Management Suspend ModeIn suspend mode, all tasks are stopped and stored in memory tosave power. When the computer resumes normal operatio

About This BookThis User's Guide contains information that will help you operate theIBM ThinkPad 755CX computer (hereafter called 755CX orcompute

Using Power ManagementThe current status of the computer is shown by the followingindicators:Current StatusIndicatorsSuspend Mode Power-OnIn suspend

Using Power ManagementDOSFor DOS:1If a hibernation file has not been created on the harddisk, type PS2 HFILE X; then press Enter to create ahibernatio

Using Power ManagementWhen the computer is powered with battery power, it turnspower off to the PC Card, so the duration of suspend mode islonger. Whe

Using Power Management Hibernation ModeBefore using hibernation mode, you must create a hibernation file.See page 59 for instructions.Note: Using the

Using Power ManagementThe following shows what causes the computer to enter hibernationmode and to resume normal operation:Fn key function:Page 48.To

Using Power ManagementCreating the Hibernation FileWarning: The hibernation file must not becreated in a compressed dataarea of the hard disk or exter

Using Power ManagementConsiderations for Hibernation ModeConsider the following before using hibernation mode:Do not run any tasks while the hibernati

Using PC CardsUsing PC CardsTo insert the PC Card:Page 134.Your computer has two slots that allow you to install one or twocredit-card-size PC Cards.

Using PC CardsUsing the PC Card Director ProgramThe PC Card Director is an advanced IBM program that makes iteasy to use PC Cards by:Auto Configurator

Using PC CardsUnderstanding the Meaning of IconsThe PC Card Director uses various icons to show you the status ofthe PCMCIA slots and the type of PC C

Information NoticesThis User's Guide contains notices that relate to specific information or text.Usild Lke SejkProviding PowerOlkesaduyelksfak

Using PC CardsCard-Type IconsIcon DOS Message MeaningMemory Memory cardHard Disk Hard disk cardLAN Communication cardModem Modem card(Depends onthe ty

Using PC CardsOS/2Starting PC Card Director for OS/2: Click on the PC Card Director icon on the OS/2 Desktop.PCCard DirectorThe following screen appe

Using PC CardsThe following choices appear in the View pull-down menu:OptionsHelpViewPCMCIASocket-DetailViewNo.Status CardTypeCardInformDetailsIconPCC

Using PC CardsRegisterObjectMemoryOKHelpVObjectListLaunch...IBMAntiVirus/2ProgramLaunchRemoveSelectacardtypeDraganddropWorkplaceobjectsbelow.Automatic

Using PC CardsTo register a PCMCIA application program, do the following:1.Select the type of PC Card on which the application program isto run.2.Type

Using PC CardsDOSStarting PC Card Director for DOSTo start PC Card Director, type C:\THINKPAD\EZPLAY at the DOSprompt; then press Enter. The following

Using PC CardsWINStarting PC Card Director for WindowsNote: PC Card Director for Windows runsonly in Enhanced mode of Windows3.11 or later version.Sel

Using PC Cardsoption. If you register more than one application for each type ofPC Card, select the application you want to run from the list thatappe

Communicating with the Infrared PortUsing the Infrared Communication FeatureNote: When installing an operatingsystem, you must install the infrareddev

Communicating with the Infrared PortDuring communication with rear infrared ports, the infrared portsmust face directly with each other at a communica

Electrical Safety NoticeDANGER:The power cord must be used with a properly grounded outlet.Electrical current from power, telephone, and communicatio

Communicating with the Infrared PortCommunication can be affected by the light from the LCD of thecomputer. To avoid this, open the LCD of the compute

Using the Mwave DSP Audio FeaturesUsing the Mwave DSP FeaturesNote: In some countries, the Mwavetelephony functions are availableonly after the DAA/Te

Using the Mwave DSP Audio FeaturesNote: In some countries, the Mwavetelephony functions are availableafter the DAA/Telephony Kit optionis installed.Th

Using the Mwave DSP Audio FeaturesTo install the Mwave DSPsupport software:Page 192.The Mwave DSP supports the following functions for each operatings

Using the Mwave DSP Audio FeaturesUsing the Audio FunctionUse the Mwave audio functions according to your operating system.OS/2 For OS/2The Mwave feat

Using the Mwave DSP Audio FeaturesDOS For DOSThe Mwave feature supports the audio for DOS games through theSound Blaster support.To enable Sound Blast

Using the Mwave DSP Audio FeaturesWINFor Windows or WIN-OS/2Note: To use the Mwave audio features inWIN-OS/2, install the Mwave DSPsupport software fo

Using the Mwave DSP Audio FeaturesAudio Control Audio ControlWhen you double-click on the Audio Control icon, the followingwindow appears:MwaveAudioCo

Using the Mwave DSP Audio FeaturesNote: Selecting the Audio/Image Synchon the Options menu improves theresponse speed; however, theincrease in DSP res

Using the Mwave DSP Audio FeaturesSelect SynthesizerNote: When you use wave audio and Auxat the same time, select 24 voices(the default value).When yo