Chapter 6. Replacing devices

This chapter contains the following items:

•“Static electricity prevention” on page 59

•“Disabling the built-in battery” on page 59

•“Installing or replacing the SIM card” on page 60

•“Replacing the base cover assembly” on page 61

•“Replacing the hard disk drive or solid-state drive” on page 62

•“Replacing a memory module” on page 64

•“Replacing an M.2 wireless LAN card” on page 65

•“Replacing an M.2 wireless WAN card” on page 68

•“Replacing the backup battery” on page 71

•“Replacing the keyboard” on page 72

Static electricity prevention

Static electricity, although harmless to you, can seriously damage computer components and options. Improper handling of static-sensitive parts can cause damage to the part. When you unpack an option or a CRU, do not open the static-protective package that contains the part until the instructions direct you to install the part.

When you handle options or CRUs, or perform any work inside the computer, take the following precautions to avoid static-electricity damage:

•Limit your movement. Movement can cause static electricity to build up around you.

•Always handle components carefully. Handle adapters, memory modules, and other circuit boards by the edges. Never touch exposed circuitry.

•Prevent others from touching components.

•When you install a static-sensitive option or CRU, touch the static-protective package that contains the part to a metal expansion-slot cover or other unpainted metal surface on the computer for at least two seconds. This reduces static electricity in the package and your body.

•When possible, remove the static-sensitive part from the static-protective packaging and install the part without setting it down. When this is not possible, place the static-protective package on a smooth, level surface and place the part on the package.

•Do not place the part on the computer cover or other metal surface.

Disabling the built-in battery

Before replacing any devices, ensure that you have disabled the built-in battery by doing the following:

1.Turn off your computer and disconnect the ac power adapter and all cables from the computer.

2.Turn on your computer. Press F1 to enter ThinkPad Setup when the ThinkPad logo appears.

3.Select Config ➙ Power. The Power submenu is displayed.

4.Select Disable Built-in Battery.

5.Select Yes in the Setup Warning window. Then the computer will turn off automatically. Wait three to five minutes to let the computer cool. Then the built-in battery is disabled.

© Copyright Lenovo 2013

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Lenovo 20AA000MUS, T431s, 20AA000BUS manual Replacing devices, Static electricity prevention, Disabling the built-in battery
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20AA, T431s, 20AA000MUS, 20AA000BUS specifications

The Lenovo ThinkPad series has long been a favorite among business professionals and tech enthusiasts alike, and the Lenovo 20AA000BUS, 20AA000MUS, and T431s models exemplify the brand's commitment to innovation, performance, and rugged design. These laptops are designed for enterprise users who require reliability and versatility in their everyday tasks.

The Lenovo 20AA000BUS model features a robust Intel Core processor that ensures smooth multitasking and quick application launches. Paired with a generous amount of RAM, users can easily run demanding applications and simultaneously manage numerous browser tabs without a hitch. The full HD display provides sharp visuals and vibrant colors which enhance productivity, whether one is working on spreadsheets, watching videos, or conducting presentations.

In terms of connectivity, these models boast several USB ports, HDMI output, and an SD card reader, which facilitate seamless integration with various peripherals and external devices. With the inclusion of robust wireless options, including Wi-Fi and Bluetooth, users can stay connected throughout their workspaces and collaborate effortlessly with coworkers.

Security features are a priority for Lenovo, and the 20AA000MUS model does not disappoint. Built with a fingerprint reader and a webcam privacy shutter, users can feel confident in their data safety. Lenovo's Trusted Platform Module (TPM) technology further enhances system security by encrypting sensitive data.

The T431s, a prominent model in this lineup, prides itself on its sleek and lightweight design, making it easily portable for professionals on the go. The carbon fiber and magnesium alloy chassis not only lends to its durability but also ensures that it withstands the rigors of daily travel.

Battery life is another highlight of these models, capable of lasting through an entire workday, which is a significant advantage for users who often find themselves away from power sources. The Quick Charge feature allows for rapid recharging, ensuring that users can quickly power up their devices before heading into meetings or events.

Overall, the Lenovo 20AA000BUS, 20AA000MUS, and T431s represent a blend of advanced technology, user-centric design, and robust security features. They stand out as reliable companions for professionals seeking efficiency and performance in their computing devices. Whether in the office or on the move, these laptops meet the demanding needs of the modern workforce.
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