Note: Phone numbers are subject to change without notice. If the number for your country or region is not provided, contact your Lenovo reseller or Lenovo marketing representative.

If possible, be at your computer when you call and have the following information available:

vMachine type and model

vSerial numbers of your hardware products

vDescription of the problem

vExact wording of any error messages

vHardware and software configuration information

Using other services

If you travel with your computer or relocate it to a country where your desktop or notebook computer machine type is sold, your computer might be eligible for International Warranty Service, which automatically entitles you to obtain warranty service throughout the warranty period. Service will be performed by service providers authorized to perform warranty service.

Service methods and procedures vary by country, and some services might not be available in all countries. International Warranty Service is delivered through the method of service (such as depot, carry-in, or on-site service) that is provided in the servicing country. Service centers in certain countries might not be able to service all models of a particular machine type. In some countries, fees and restrictions might apply at the time of service.

To determine whether your computer is eligible for International Warranty Service and to view a list of the countries where service is available, go to http://www.lenovo.com/support/, click Warranty, and follow the instructions on the screen.

For technical assistance with the installation of or questions related to Service Packs for your preinstalled Microsoft Windows product, refer to the Microsoft Product Support Services Web site at http://support.microsoft.com/directory/, or you can contact the Customer Support Center. Some fees might apply.

Purchasing additional services

During and after the warranty period, you can purchase additional services, such as support for hardware, operating systems, and application programs; network setup and configuration; upgraded or extended hardware repair services; and custom installations. Service availability and service name might vary by country or region. For more information about these services, go to the Lenovo Web site at http://www.lenovo.com.

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Lenovo 9640, 9638, 9643, 9644, 9645, TC A55-9636 manual Using other services, Purchasing additional services

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.