Using the documentation and diagnostic programs

Many computer problems can be solved without outside assistance. If you experience a problem with your computer, see Chapter 7, “Troubleshooting and diagnostics,” on page 53. For information on additional resources to help you troubleshoot your computer problem, see “Information resources” on page 61.

If you suspect a software problem, see the documentation, including README files and online help, that comes with the operating system or application program.

Most computers come with a set of diagnostic programs that you can use to help you identify hardware problems. For instructions on using the diagnostic programs, see “Diagnostic programs” on page 54.

The troubleshooting information or the diagnostic programs might tell you that you need additional or updated device drivers or other software. Lenovo maintains pages on the World Wide Web where you can get the latest technical information and download device drivers and updates. To access these pages, go to http://www.lenovo.com/support/ and follow the instructions.

Calling for service

If you have tried to correct the problem yourself and still need help, during the warranty period you can get help and information by telephone through the Customer Support Center. The following services are available during the warranty period:

vProblem determination - Trained personnel are available to assist you with determining if you have a hardware problem and deciding what action is necessary to fix the problem.

vHardware repair - If the problem is determined to be caused by hardware under warranty, trained service personnel are available to provide the applicable level of service.

vEngineering Change management - Occasionally, there might be changes that are required after a product has been sold. Lenovo or your reseller, if authorized by Lenovo, will make selected Engineering Changes (ECs) available that apply to your hardware.

Note: The following items are not covered:

vReplacement or use of parts not manufactured for or by Lenovo or nonwarranted Lenovo parts

vIdentification of software problem sources

vConfiguration of BIOS as part of an installation or upgrade

vChanges, modifications, or upgrades to device drivers

vInstallation and maintenance of network operating systems (NOS)

vInstallation and maintenance of application programs

Refer to the safety and warranty information that is provided with your computer for a full explanation of warranty terms. Be sure to retain your proof of purchase to obtain warranty service.

For a list of service and support phone numbers for your country or region, go to http://www.lenovo.com/support/ and click Support phone list or refer to the safety and warranty information provided with your computer.

Chapter 8. Getting information, help, and service 63

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Lenovo 9645, 9638, 9643, 9644, 9640, TC A55-9636 manual Using the documentation and diagnostic programs, Calling for service
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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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