Real Time Clock battery | Toshiba Satellite 2450 specification

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User's Manual

Before you remove the battery pack, set the computer to Hibernation mode or save your data and shut down the computer. Do not change the battery pack while the universal AC adaptor is connected.

CAUTIONS: 1. The battery pack is a lithium ion battery, which can explode if not properly replaced, used, handled or disposed of. Dispose of the battery as required by local ordinances or regulations. Use only batteries recom- mended by TOSHIBA as replacements.

2.Do not remove the battery pack while the computer is in Standby mode. Data is stored in RAM, so if the computer loses power it will be lost. When the com- puter is powered off in Standby mode, and the universal AC adaptor is not connected, the battery pack supplies power to maintain data and program in memory. If the battery pack is completely discharged, Standby mode does not function and the computer loses all data in memory.

To ensure that the battery pack maintains its maximum capacity, operate the computer on battery power at least once a month until the battery pack is fully discharged. Refer to Extending battery life in this chapter for procedures. If the computer is continuously operated on AC power through a universal AC adaptor for an extended period, more than a month, the battery may fail to retain a charge. It may not function efficiently over the expected life of the battery and the Battery indicator may not indicate a low-battery condition.

Real Time Clock battery

The Real Time Clock (RTC) battery provides power for the internal real time clock and calendar. It also maintains the system configuration.

If the RTC battery becomes completely discharged, the system loses this data and the real time clock and calendar stop working. The following message appears when you turn on the power:

**** RTC battery is low or CMOS checksum is inconsistent ****

Press [F1] key to set Date/Time.

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Toshiba Satellite 2450 user manual Real Time Clock battery

Contents

Toshiba Disclaimer CopyrightTrademarks FCC information FCC notice Declaration of Conformity Information EU Declaration of Conformity information FCC conditionsContact Vcci Class B Information Conformity Statement Modem warning noticeNetwork Compatibility Statement Type of service Japan regulationsRegion selection Redial Telephone company procedures If problems ariseDisconnection Fax branding Instructions for IC CS-03 certified equipment Modem warning notice for Australia AT&F AT&W AT%TE=0 ATZ Software in addition to a modem Page General conditions Description on Laser specification Page Table of Contents Operating Basics Getting StartedXvi Xvii Writing CDs on DVD Multi drive Keyboard Power and Power-Up ModesXviii Optional Devices HW Setup and PasswordsXix Troubleshooting Hardware and system checklist Appendixes Glossary Index Xxii Manual contents Preface Conventions AbbreviationsIcons Keys Key operation DisplayMessages Conventions Xxvi Stress injury Heat injury General PrecautionsPressure or impact damage Central Processing Unit CPU Performance Disclaimer PC card overheating Equipment checklist IntroductionChapter Hardware Features PowerDocumentation Processor Features Disks CD-ROM CD-EXTRA Display KeyboardPointing device Ports Slots Multimedia Slim Select Bay CommunicationsSecurity Special features Software Special features Battery save mode Utilities Options Options Slim Select Bay options CD-RW/DVD-ROM Grand Tour Front with the display closedAudio/Video Controlbuttons Left side WirelessSecurity lock Left side Right side Shows the computer’s right side Back side Back side Universal LAN jackSerial Bus Underside Under side Front with the display open Toshiba Front with the display open System indicators CD/DVD Digital DC in 15V Power Keyboard indicators Keyboard indicators CapsLock indicator USB diskette drive Indicator Slim Select Bay modulesDVD-ROM drive Slim Select Bay modules CD-RW/DVD-ROM drive DVD-R/-RW drive DVD Multi drive Slim Select Bay HDD adaptor Black Toshiba Style Bay Bridge Media Adaptor Universal AC adaptor Universal AC adaptor Grand Tour Setting up your work space Getting Started Placement of the computer General conditions Setting up your work space Seating and posture Lighting Work habits Connecting the universal AC adaptor Connecting the AC adaptor Turning on the power Opening the display Turning off the power Shut Down mode Boot modeStarting up for the first time Starting up for the first time Hibernation mode Benefits of hibernation Data save in hibernation mode Turning off the powerStarting Hibernation Automatic Hibernation Standby mode Benefits of standbyExecuting standby Clickstart, clickTurn Off Computer and clickStand by Standby limitations Restarting the computerRestarting the computer Follow the on-screen instructions Operating Basics Using the Touch PadPointing devices Using the USB diskette drive Connecting 3 1/2 diskette drive Disconnecting 3 1/2 diskette drive Changing Slim Select Bay modulesRemoving a module Changing Slim Select Bay modules Installing a module Removing the Slim Select Bay module Using optical media drives Using optical media drivesLoading discs Manual release with the eject hole Lay the CD/DVD, label side up, in the drawer Removing discs Closing the DVD-ROM drawer Before writing or rewriting Writing CDs on CD-RW/DVD-ROM driveWriting CDs on CD-RW/DVD-ROM drive When writing or rewriting Writing CD/DVDs on DVD-R/-RW drive Important messageDisclaimer Writing CD/DVDs on DVD-R/-RW drive Writing CD/DVDs on DVD Multi drive Read/write function chart DVD-RWDVD Specifications for Re-recordable Disc for Version Writing CD/DVDs on DVD Multi drive Drag’n Drop CD Data Verification Video DVD-R/-RW/-RAM Operating Basics Media care CD/DVDsDiskettes Media care Modem Region selection Properties menu Modem Connecting SettingModem Selection Dialing Properties Wireless communications DisconnectingWireless LAN Wireless communications Security Bluetooth wireless technologyWorldwide operation Wireless communication switch Wireless communication IndicatorIndicatorstatus Indication Radio links Connecting LAN cable LAN Disconnecting LAN cable Cleaning the computerCleaning the computer Moving the computer Heat dispersal Keyboard Typewriter keys Soft keys Fn key combinations F1 … F12 function keysEmulating keys on enhanced keyboard Soft keys Fn key combinations Hot keys Soft keys Fn key combinations Display clarity increases with the brightness level Arrow mode Windows special keysKeypad overlay Fn Sticky key Temporarily using normal keyboard overlay on Numeric mode Temporarily using overlay overlay off Generating Ascii charactersTemporarily changing modes Generating Ascii characters Keyboard Power and Power-Up Modes Power conditions Power indicators Battery indicators Battery types DC in indicatorPower indicator Battery pack Real Time Clock battery Safety precautions Care and use of the battery packCare and use of the battery pack Modes Care and use of the battery pack Procedures Charging time hours Battery type Power on Power offCharging the batteries Time Monitoring battery capacity Battery charging notice Maximizing battery operating time Retaining data with power off Extending battery life Replacing the battery pack Removing the battery pack Installing the battery pack Replacing the battery pack Starting the computer by password Securing the battery cover Power-up modes Panel power offPower-up modes System Auto Off Modes HW Setup and Passwords HW SetupAccessing HW Setup HW Setup window Boot Priority Power On Display HW Setup Enter Network Boot Protocol USB Password General Password was registered Device Config Key FD Supervisor password Supervisor passwordParallel/Printer Passwords Power devices Optional DevicesCards/memory Peripheral devices PC cards Inserting a PC card Removing a PC card PC cards SD cards Inserting an SD card SD card care Removing an SD cardSD cards Installing memory module Memory expansion Memory expansion Removing the keyboard brace Removing the keyboard Raising the insulation sheet 11 Installing a memory module Removing memory module Toshiba Style Bay Bridge media adaptor 13 Removing the memory module Inserting Before installingToshiba Style Bay Bridge media adaptor Removing 16 Secureing a screw SmartMedia Write protection 18 Inserting a SmartMedia Memory Stick Installing a Memory StickRemoving a Memory Stick Compact Flash Installing a Compact Flash moduleRemoving a Compact Flash memory module Battery pack Black USB FDD kitBridge media care Slim Select Bay HDD adaptor Black Slim Select Bay HDD adaptor Black 22 Opening the lid External monitor 24 Closing the lid Changing the resolution Using the TV buttonClick start and click Control Panel Link IEEE1394 25 Display properties Precautions Link IEEE1394 Security lock Point to i.LINK IEEE1394 device and click Security lock 28 Security lock Problem solving process TroubleshootingPreliminary checklist Analyzing the problem Hardware and system checklist Hardware and system checklistSystem start-up Power Self test AC power Overheating power downProblem Procedure Battery Slim Select Bay Password LCD panel Hard disk drive DVD-ROM CD-RW/DVD-ROM drive Hardware and system checklist DVD-R/-RW drive DVD Multi drive EXTRA,CD-GAudioCDonly Diskette drive SD card PC card Infrared port Touch Pad Pointing deviceClick the Pointer Options tab ProblemProcedure USB mouse USB Memory expansion Sound system Monitor Link IEEE1394 Modem No Carrier LAN Bluetooth Real Time Clock Where to write Toshiba supportBefore you call Toshiba support InEurope Specifications Power RequirementsAppendix a Environmental Requirements Communicationspecifications Display controller Display Controller and ModesAppendix B Video modes Video modes VGA Appendix B Video modes XGA Appendix B Video modes XGA Video modes Super XGA+ Video modes Super XGA+ Appendix B Appendix B AT Commands Repeat last commandAppendix C +++ Escape sequence Bn Communication standard setting Answer commandDn Dial En Echo command Hn Hook controlRequest ID information Appendix C Mn Monitor speaker mode Ln Monitor speaker volumeNn Modulation handshake Select pulse dialing On Return on-line to data modeQn Result code control Vn DCE response format Select tone dialingXn Result code selection, call progress monitoring Dial tone detect Busy tone detectZn Recall stored profile Cn Data Carrier Detect DCD control Load factory settings Dn DTR control Tn Self-test commands Gn V.22bis guard tone controlKn Local flow control selection Pn Select Pulse Dial Make/Break Ratio WW Store current configuration Display Current ConfigurationZn=x Store telephone number \Nn Error control mode selection \Qn Local flow control selection View numbers in blacklist \Vn Protocol result codeCn Data compression control Registers Register valuesAppendix D ATSn? S3 Command line termination character user defined S0 Auto answer ring numberS1 Ring counter S2 AT escape character user defined S5 Command line editing character user defined S4 Response formatting character user definedS6 Wait before dialing Appendix D S7 Connection completion time-out S8 Comma pause timeS11 Dtmf dialing speed S12 Escape guard time S37 Dial line rate AT command set result codes Result Code Numeric Description Delayed Appendix D Appendix E ModeFunction Transmissionspeed Table E-1 Result codes for a V.90 connection AT Command Appendix E Appendix E Installing the internal modem Installing the modem board and jackInternal Modem Guide Appendix F Removing the internal modem Wireless LAN Card SpecificationsRadio Characteristics Appendix G Supported Frequency Sub-bands Wireless Ieee 802.11 Channels Sets Revision B2457 Wireless Ieee 802.11 Channels Sets Revision a Appendix G Wireless Channels Sets Turbo Mode AC Power Cord Connectors Appendix H USA and Canada Australia Europe Parts Numbers Appendix Configurations Abbreviations GlossaryGlossary-1 Adaptor Glossary-2 Cache memory Glossary-3 Capacity Glossary-4 Dielete Glossary-5 Device driver Glossary-6 Hard disk drive HDD Glossary-7 Hardware Glossary-8 Menu Glossary-9 Microprocessor Glossary-10 Prompt Glossary-11 Radio frequency interference RFI shield Glossary-12 Write protection Glossary-13 Glossary Glossary-14 Index IndexIndex-1 Index-2 Index-3 Index-4 Index-5 Index-6