Lenovo 9644, 9638, 9643 Lithium battery notice, Modem safety information, To connect To disconnect

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vDisconnect the attached power cords, telecommunications systems, networks, and modems before you open the device covers, unless instructed otherwise in the installation and configuration procedures.

vConnect and disconnect cables as described in the following table when installing, moving, or opening covers on this product or attached devices.

To connect:

To disconnect:

1.

Turn everything OFF.

1.

Turn everything OFF.

2.

First, attach all cables to devices.

2.

First, remove power cords from outlet.

3.

Attach signal cables to connectors.

3.

Remove signal cables from connectors.

4.

Attach power cords to outlet.

4.

Remove all cables from devices.

5.

Turn device ON.

 

 

 

 

 

 

Lithium battery notice

Caution

Danger of explosion if battery is incorrectly replaced.

When replacing the lithium coin cell battery, use only the same or an equivalent type that is recommended by the manufacturer. The battery contains lithium and can explode if not properly used, handled, or disposed of.

Do not:

vThrow or immerse into water

vHeat to more than 100°C (212°F)

vRepair or disassemble

Dispose of the battery as required by local ordinances or regulations.

The following statement applies to users in the state of California, U.S.A.

Perchlorate material: Special handling may apply. See

www.dtsc.ca.gov/hazardouswaste/perchlorate.

Modem safety information

Caution

To reduce the risk of fire, use only No. 26 AWG or larger telecommunication line cord.

To reduce the risk of fire, electrical shock, or injury when using telephone equipment, always follow basic safety precautions, such as:

vNever install telephone wiring during a lightning storm.

vNever install telephone jacks in wet locations unless the jack is specifically designed for wet locations.

vNever touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the network interface.

vUse caution when installing or modifying telephone lines.

xiiUser Guide

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Contents Page Page Page Page Contents Appendix A. Manual modem Important safety information Conditions that require immediate actionGeneral safety guidelines Service and upgradesStatic electricity prevention Power cords and power adapters Voltage-selection switchExternal devices Extension cords and related devicesPlugs and outlets BatteriesHeat and product ventilation Electrical current safety information Operating environmentTo connect To disconnect Lithium battery noticeModem safety information Power supply statement Laser compliance statementAdditional safety information Data safetyCleaning and maintenance Introduction Xvi User Guide Glare and lighting Arranging your workspaceComfort Air circulation Electrical outlets and cable lengthsSetting up your computer Connecting your computerUser Guide Setting up your computer User Guide 1394 Completing important tasks Turning on powerFinishing the software installation Updating your antivirus software Installing other operating systemsUpdating your operating system Shutting down the computerUser Guide Installing options FeaturesMemory Expansion Available options Weight SpecificationsDimensions EnvironmentHandling static-sensitive devices Supported operating positionsTools required Installing external options Locating connectors on the rear of your computer Connector Description Obtaining device driversOpening the cover Locating components Accessing system board components and drives Bios WP Identifying parts on the system boardInstalling memory Installing PCI adapters What to do nextInstalling internal drives Drive specifications Installing a drive in bay Connecting a serial ATA drive Installing a diskette drive in bay Installing options Security features Integrated cable lock Password protection Changing the batteryErasing a lost or forgotten password clearing Cmos Closing the cover and connecting the cables User Guide Recovering software Creating and using the Product Recovery discPerforming backup and recovery operations Using the Rescue and Recovery workspace Creating and using rescue media Creating and using a Recovery Repair diskette To create rescue media, do the followingRecovering or installing device drivers Setting a rescue device in the startup sequence Solving recovery problemsUser Guide Viewing and changing settings Using the Setup UtilityStarting the Setup Utility program Using passwordsSetting, changing, and deleting a password User PasswordAdministrator Password Using Security Profile by DeviceChanging the startup device sequence Selecting a startup deviceSelecting a temporary startup device Advanced settings Exiting from the Setup Utility programUpdating system programs Using system programsUpdating flashing Bios from a diskette or CD-ROM Updating flashing Bios from your operating system Recovering from a POST/BIOS update failureUpdating system programs User Guide Symptom Action Troubleshooting and diagnosticsBasic troubleshooting Diagnostic programs PC-Doctor for Windows PC-Doctor for DOSCreating diagnostic diskettes Optical mouse Cleaning the mousePC-Doctor for Windows PE Non-optical mouse Troubleshooting and diagnostics User Guide Online Books folder Getting information, help, and serviceInformation resources ThinkVantage Productivity CenterHelp and service Access HelpSafety and Warranty Using the documentation and diagnostic programs Calling for serviceUsing other services Purchasing additional servicesAppendix A. Manual modem commands Basic AT commandsSet Tone Dial as default Low speaker volumeSet Pulse dial as default Internal speaker on until carrier detectedExtended AT commands MNP/V.42/V.42bis/V.44 commands Fax Class 1 commands Fax Class 2 commandsVoice commands Appendix A. Manual modem commands User Guide Appendix B. Notices Television output notice TrademarksIndex Page Page Part Number 42Y4610
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TC A55-9636, 9640, 9645, 9644, 9643 specifications

Lenovo has consistently been at the forefront of innovation in the computing world, with a range of laptops and desktops that cater to a variety of needs and preferences. Among their popular offerings are the Lenovo 9640, 9643, TC A55-9636, 9644, and 9645. Each of these models is designed to provide exceptional performance, reliability, and user-friendly experience, making them appealing choices for both personal and business use.

The Lenovo 9640 is renowned for its sleek design and powerful performance. This model is equipped with the latest Intel processors, ensuring smooth multitasking and efficient power consumption. It features a vibrant display that provides excellent color accuracy and vivid visuals, making it ideal for content creators and casual users alike. With ample storage options and high-speed SSD configurations, users can expect fast boot times and quick file access.

Similarly, the Lenovo 9643 builds on this legacy, offering enhanced graphics capabilities with dedicated GPU options. This feature is particularly beneficial for gamers and professionals who rely on graphical performance for tasks such as video editing or 3D modeling. The 9643 also emphasizes connectivity, providing a range of ports, including USB-C, HDMI, and Ethernet, ensuring users can easily connect to peripherals and networks.

The TC A55-9636 is Lenovo's entry into the compact desktop market, designed for users seeking a powerful, space-saving solution. With its robust performance metrics and energy-efficient components, the A55-9636 is perfect for both home and office environments. It supports a variety of multitasking scenarios, making it suitable for productivity-driven tasks, while its expandable architecture means users can upgrade components as their needs evolve.

The Lenovo 9644 and 9645 round out this impressive lineup with their focus on business-centric features. These models provide enhanced security options, including fingerprint readers and TPM chips, catering to enterprises that prioritize data protection. With long battery life and solid build quality, both models promise durability and reliability, critical for professionals who are always on the go.

All models in this series showcase Lenovo's commitment to sustainability, incorporating eco-friendly materials and energy-efficient technologies. The user-friendly interfaces across the devices ensure a seamless experience, meeting the demands of a broad user base from students to business executives. In summary, the Lenovo 9640, 9643, TC A55-9636, 9644, and 9645 represent a versatile range of computing solutions that combine cutting-edge technology with efficiency, ensuring users can achieve their goals effectively and stylishly.
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