Lenovo Yoga C940-15IRH 81TE000SMH User manual

Lenovo Yoga C940-15IRH
User Guide

Read this first

Before using this documentation and the product it supports, ensure that you read and understand the
following:

• Appendix A “Important safety information” on page 35

• Safety and Warranty Guide

• Setup Guide

First Edition (July 2019)

© Copyright Lenovo 2019.

LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services
Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS­35F-05925.

Contents

About this documentation . . . . . . . . iii

Chapter 1. Meet your computer. . . . . 1

Front . . . . . . . . . . . . . . . . . . . . 1

Base . . . . . . . . . . . . . . . . . . . . 2

Left . . . . . . . . . . . . . . . . . . . . 3

Right . . . . . . . . . . . . . . . . . . . . 4

Bottom . . . . . . . . . . . . . . . . . . . 5

Features and specifications . . . . . . . . . . . 6

Statement on USB transfer rate . . . . . . . . 7

Operating environment . . . . . . . . . . . 7

Chapter 2. Get started with your

computer . . . . . . . . . . . . . . . . . 9

Get started with Windows 10 . . . . . . . . . . 9

Windows account . . . . . . . . . . . . . 9

Windows user interface . . . . . . . . . . 11

Lenovo Vantage and Lenovo PC Manager . . . . 12

Connect to Wi-Fi networks . . . . . . . . . . 12

Forget a Wi-Fi network . . . . . . . . . . 12

Turn airplane mode on and off . . . . . . . 12

The Novo Button menu . . . . . . . . . . . . 13

Open the Novo Button menu . . . . . . . . 13

Yoga modes . . . . . . . . . . . . . . . . 13

Turn on screen rotation lock . . . . . . . . 15

Use Windows touch keyboard . . . . . . . 15

Turn tablet mode on and off . . . . . . . . 16

Interact with your computer . . . . . . . . . . 16

Numeric keypad . . . . . . . . . . . . . 16

Keyboard hotkeys . . . . . . . . . . . . 16

Multi-touch gestures . . . . . . . . . . . 17

The Lenovo Integrated Pen . . . . . . . . 19

Chapter 3. Explore your computer . . 23

Connect to an external display device . . . . . . 23

Connect a wired display device . . . . . . . 23

Connect a wireless display device . . . . . . 23

Manage power . . . . . . . . . . . . . . . 23

Check the battery status . . . . . . . . . 24

Charge the battery . . . . . . . . . . . . 24

Check the battery temperature . . . . . . . 24

Set power button behavior. . . . . . . . . 24

Change or create a power plan . . . . . . . 24

Set performance mode . . . . . . . . . . 24

Change settings in UEFI/BIOS setup utility . . . . 25

What is UEFI/BIOS setup utility . . . . . . . 25

Open the UEFI/BIOS setup utility . . . . . . 25

Change startup sequence . . . . . . . . . 25

Change hotkey mode. . . . . . . . . . . 25

Enable or disable always-on . . . . . . . . 25

Set passwords in UEFI/BIOS setup utility . . . . . 26

Password types . . . . . . . . . . . . . 26

Set administrator password . . . . . . . . 26

Change or remove administrator password . . 26

Set user password . . . . . . . . . . . . 27

Enable power-on password . . . . . . . . 27

Set hard disk password . . . . . . . . . . 27

Change or remove hard disk password . . . . 28

Reset or restore Windows . . . . . . . . . . . 28

Windows 10 recovery options . . . . . . . 28

Windows System Restore . . . . . . . . . 28

Reset Windows . . . . . . . . . . . . . 29

Create a recovery drive . . . . . . . . . . 29

Use a recovery drive to restore or reset

Windows . . . . . . . . . . . . . . . 30

Chapter 4. Help and support . . . . . 31

Frequently asked questions . . . . . . . . . . 31

Self-help resources . . . . . . . . . . . . . 31

Call Lenovo . . . . . . . . . . . . . . . . 33

Before you contact Lenovo . . . . . . . . 33

Lenovo Customer Support Center . . . . . . 33

Purchase additional services. . . . . . . . . . 34

Appendix A. Important safety

information . . . . . . . . . . . . . . . 35

Appendix B. Accessibility and

ergonomic information . . . . . . . . 47

Appendix C. Compliance

information . . . . . . . . . . . . . . . 51

Appendix D. Notices and

trademarks . . . . . . . . . . . . . . . 65

© Copyright Lenovo 2019 i

ii Lenovo Yoga C940-15IRH User Guide

About this documentation

• Illustrations in this documentation might look different from your product.

• Depending on the model, some optional accessories, features, and software programs might not be

available on your computer.

• Depending on the version of operating systems, some user interface instructions might not be applicable

to your computer.

• Documentation content is subject to change without notice. Lenovo makes constant improvements on the

documentation of your computer, including this User Guide. To get the latest documentation, go to

support.lenovo.com

• Microsoft

®

makes periodic feature changes to the Windows® operating system through Windows Update.

.

As a result, some information in this documentation might become outdated. Refer to Microsoft resources
for the latest information.

https://

© Copyright Lenovo 2019 iii

iv Lenovo Yoga C940-15IRH User Guide

Chapter 1. Meet your computer

Front

1. Microphones

2. Camera Take pictures or record videos by clicking Camera from the Start menu.

3. Camera cover slider

4. Camera light If the light is on, the camera is in use.

5. Multi-touch screen Display text, graphics, and videos.

6. Speakers

© Copyright Lenovo 2019 1

Capture or record sound and voice.

Note: If you use other apps that support photo capture, video chat, and video
conference, the camera starts automatically when you enable the camera­required feature from the app.

Move the slider to cover or uncover the camera lens.

Note: The camera cover helps you better protect your privacy.

Note: The screen also supports multi-touch function. You can use your fingers or

the included pen to interact with the computer.

Produce sound.

Base

1. Wireless antennas

2. Keyboard Enter characters and interact with programs.

3. Fingerprint reader Enroll and read your fingerprint for user authentication.

4. Touchpad Perform finger touch and all the functions of a traditional mouse.

Send and receive radio waves for the built-in wireless LAN (local area network)
and Bluetooth module.

Note: The antennas are not visible from the outside of the computer.

Note: In addition to character keys, the keyboard also includes hotkeys, function

keys, and a numeric keypad.

Note: The touchpad also supports multi-touch function.

2 Lenovo Yoga C940-15IRH User Guide

Left

1. Power connector Connect to power with the included power cord and the ac power adapter.

2. Charging light Indicate the power and battery status of the computer.

3. Thunderbolt

4. Combo audio jack Connect headphones or headsets with a 3.5-mm (0.14-inch), 4-pole plug.

Table 1. Indication of the charging light

Light status

Solid white Connected Charged 91% – 100%

Solid amber Connected Charging 1% – 90%

Off Not connected / /

TM

3 connectors

Connect external display, storage, or data devices.
Note: An appropriate adapter may be needed for connecting external devices.

• Support data transfer rates up to 40 Gbps for Thunderbolt 3.

• Support DisplayPort 1.4.

• Provide up to 5 V, 3 A power output.

Note: This jack does not support standalone external microphones. If you use
headsets, choose one with a single plug.

power

ac

Battery satus Battery capacity

Chapter 1. Meet your computer 3

Right

1. Pen slot Use the pen to write and draw on the computer screen.

2. USB (3.1 Gen 1) Type-A
connector (always-on)

3. Power light Indicate the power and battery status of the computer.

4. Power button Turn on the computer or put the computer into sleep mode.

Table 2. Indication of the power light

Power light status

Solid white

Fast blinking white Turned on 1% – 20%

Slow blinking white

Off Turned

The always-on connector can charge external devices when the computer is
turned off, in sleep or hibernation modes.
Note: The always-on function can be turned on or off in one or more of the
following software:

Lenovo Vantage
Lenovo PC Manager
UEFI/BIOS Setup utility

Note: See “Set power button behavior” on page 24 for how to change the power
button behavior in Windows.

Computer

Turned on 21% – 100%

In sleep mode

off or in hibernation mode /

Battery

/

capacity

4 Lenovo Yoga C940-15IRH User Guide

Bottom

1. Novo button hole Press the Novo button to open the Novo Button menu. From the menu, you can
choose to open the UEFI/BIOS setup utility, the Boot menu, or the Windows
startup options screen.

2. Speakers Produce sound.

Chapter 1. Meet your computer 5

Features and specifications

Dimensions

ac power adapter

Battery pack

Microprocessor To view the microprocessor information of your computer, right-click the Start

Memory Onboard DDR4

Storage device

Screen

• Width: 355.2 mm (13.98 inches)

• Depth: 238.39 mm (9.38 inches)

• Thickness

– Thinnest: 17.5 mm (0.69 inches)
– Thickest: 19.7 mm (0.78 inches)

• Input: 100 V – 240 V ac, 50 Hz to 60 Hz

• Output: 20 V dc, 6.75 A

• Power: 135 W

• 69 Wh

• 4 cells

button and then select System.

• Type: solid-state drive

• Form factor: M.2 (2280)

• Bus: PCI Express

• Size: 396.2 mm (15.6 inches)

• Display resolution

– 1920 x 1080 pixels full high definition (FHD)
– 3840 x 2160 pixels ultra high definition (UHD)

Keyboard

Connectors and slots

Wireless features

• Hotkeys

• Function keys

• Numeric keypad

• Keyboard backlight

• ac power connector

• Combo audio jack

• USB (3.1 Gen 1) Type-A connector (always-on)

• Two Thunderbolt 3 connectors

• Lenovo Integrated Pen slot

• Bluetooth

• Wireless LAN

Note: The battery capacity is the typical or average capacity as measured in a specific test environment.
Capacities measured in other environments may differ but are no lower than the rated capacity (see product
label).

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Lenovo Yoga C940-15IRH User Guide

Statement on USB transfer rate

Depending on many factors such as the processing capability of the host and peripheral devices, file
attributes, and other factors related to system configuration and operating environments, the actual transfer
rate using the various USB connectors on this device will vary and will be slower than the data rate listed
below for each corresponding device.

USB device Data rate (Gbit/s)

3.1 Gen 1

Gen 2

3.1

5

10

Operating environment

Maximum altitude (without pressurization)

3048 m (10,000 ft)

Temperature

• At altitudes up to 2438 m (8000 ft)

– Operating: 5°C to 35°C (41°F to 95°F)
– Storage: 5°C to 43°C (41°F to 109°F)

• At altitudes above 2438 m (8000 ft)

– Maximum temperature: 31.3°C (88°F)

Note: When you charge the battery, its temperature must be no lower than 10°C (50°F).

Relative humidity

• Operating: 8% to 95% at wet-bulb temperature 23°C (73°F)

• Storage: 5% to 95% at wet-bulb temperature 27°C (81°F)

Chapter 1. Meet your computer 7

8 Lenovo Yoga C940-15IRH User Guide

Chapter 2. Get started with your computer

Get started with Windows 10

Learn the basics of Windows 10 and start working with it right away. For more information about Windows
10, see the Windows help information.

Windows account

You must create at least one account to use the Windows operating system. It can be either a local account
or a Microsoft account.

Local accounts

A local account is created on a particular Windows-enabled device and it can only be used on that device. It
is recommended that you set a password for each local account to prevent unauthorized access to the
device.

Microsoft accounts

A Microsoft account is a user account that you use to sign in to Microsoft software and services. If you use
Microsoft services like OneDrive, Outlook.com, Xbox Live, Office 365, and Skype, you might already have
one. If you don't have it, you can create one for free.

There are two main benefits of using a Microsoft account:

• Sign in only once. If you use a Microsoft account to sign in to Windows 10, you don’t need to sign in again
to use OneDrive, Skype, Outlook.com, and other Microsoft services.

• Settings can be synced. If you use your Microsoft account to sign in to multiple Windows-enabled
devices, certain Windows settings can be synced among the devices.

Switch between a local and a Microsoft account

If you are using a local account to sign in to Windows 10, you can switch to use a Microsoft account instead.

Step 1. Open the Start menu and select Settings ➙ Accounts.
Step 2. Select Sign in with a Microsoft account instead.
Step 3. If you already have a Microsoft account, enter the account name and password to sign in.

Otherwise, select Create one to create a new Microsoft account.

Note: The device must have Internet access the first time you use a Microsoft account on that
device.

If you want to switch back to use a local account, open the Start menu and select Settings ➙ Accounts ➙

Sign in with a local account instead.

Add additional user accounts

Your user account must be of the “Administrator” type to add additional user accounts to Windows.

Add additional user accounts if you need to share your computer with family members or other people.

Step 1. Open the Start menu and select Settings ➙ Accounts ➙ Family & other users.
Step 2. Select Add someone else to this PC.

© Copyright Lenovo 2019 9

Note: By default, you are prompted to add Microsoft accounts. If you don’t know the person’s
Microsoft account, select I don’t have this person’s sign-in information. Follow on-screen
instructions to create a Microsoft account for the person. Alternatively, select Add a user without a

Microsoft account to create a local account for the person.

Enroll your fingerprint

If your computer includes a fingerprint reader, you can enroll your fingerprint for Windows sign-in.

Step 1. Open the Start menu and select Settings ➙ Accounts ➙ Sign-in options.

Note: If you are using a local account, the account must be password protected. Otherwise, you

cannot enroll fingerprints.
Step 2. Select Windows Hello Fingerprint ➙ Set up ➙ Get started.
Step 3. Follow on-screen instructions to complete enrollment. Create a PIN when prompted, in case your

fingerprint cannot be recognized at Windows sign-in.

Note: You can enroll more than one fingerprint.

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Lenovo Yoga C940-15IRH User Guide

Windows user interface

1. Account

2. Documents

3. Pictures

4. Settings

5. Power

6. Start button

7. Windows Search

8. Task View

9. Windows notification area

10. Battery status icon

11. Network icon

12. Action center

Change account settings, lock the computer, or sign out from the current account.

Open the Documents folder, a default folder to save your received files.

Open the Pictures folder, a default folder to save your received pictures.

Launch Settings.

Shut down, restart, or put the computer into sleep.

Open the Start menu.

Type what you are looking for in the search box and get search results from your
computer and the Web.

Display all opened apps and switch among them.

Display notifications and status of some features.

Display power status and change battery or power settings. When your computer
is not connected to ac power, the icon changes to

Connect to an available wireless network and display the network status.

Display the latest notifications from apps and provide quick access to some
features.

Open the Start menu

• Click the Start button.

• Press the Windows logo key on the keyboard.

.

Access Control Panel

• Open the Start menu and click Windows System ➙ Control Panel.

• Use Windows Search.

Chapter 2. Get started with your computer 11

Launch an app

• Open the Start menu and select the app you want to launch.

• Use Windows Search.

Lenovo Vantage and Lenovo PC Manager

Lenovo Vantage and Lenovo PC Manager is software developed by Lenovo. Using the software, you can:

• View product information

• View warranty and support information

• Run hardware scan and diagnose problems

• Change hardware settings

• Update Windows, drivers, and UEFI/BIOS

Lenovo Vantage or PC Manager may be pre-installed on your computer. To open it, enter the software name
in Windows Search and select the matched result.

Note: If Lenovo Vantage is not pre-installed, you can download it from Microsoft Store.

Connect to Wi-Fi networks

If your computer includes a wireless adapter, you can connect your computer to Wi-Fi networks.

Step 1. Click the network icon in the Windows notification area. A list of nearby networks is displayed.

Note: If no network is displayed, check to ensure that the airplane mode is not turned on.
Step 2. Select a network and click Connect. Provide security key if prompted.

Note: The network key is usually managed by the network administrator.

Forget a Wi-Fi network

Windows saves a list of Wi-Fi networks you have connected to, along with their passwords and other
settings. By doing this, your computer is automatically connected when it is in the range of a previously
connected network. However, if the network password has been changed, you need to forget the network in
order to enter the new password.

Step 1. Select Start ➙ Settings ➙ Network & Internet ➙ Wi-Fi.
Step 2. Click Manage known networks.
Step 3. Click the network name and click Forget.

Turn airplane mode on and off

Airplane mode is a convenient setting to turn on or off all wireless communication of your computer. You may
need to turn it on when boarding an airplane.

Step 1. Click the notification icon in the Windows notification area.
Step 2. Click the airplane mode icon to turn it on or off.

Note: Click Expand if you cannot find the airplane mode icon.

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Lenovo Yoga C940-15IRH User Guide

The Novo Button menu

The Novo Button menu can be displayed before the operating system starts. From the menu, you can
choose to

• Open the BIOS/UEFI setup utility

• Open the boot device selection menu

• Open the Windows startup options screen

Note: From the Windows startup options screen, you can then choose to

Start your computer using a recovery drive
Reset your computer
Open advanced options screen

Open the Novo Button menu

For Lenovo computers with a Novo button, you can press the button to open the Novo Button menu.

Step 1. Turn off the computer.
Step 2. Open the LCD screen and press the Novo button.

Note: Alternatively, turn off the computer. Press Fn and the power button to open the Novo Button menu.

Yoga modes

The screen of your computer can open up to 360 degrees, enabling you to use your computer for different
purposes.

Chapter 2. Get started with your computer 13

Mode Suitable for

Notebook mode

• Entering text

• Drag and drop operations using the touchpad

Stand mode

• Gving a presentation

• Viewing a slide show

14 Lenovo Yoga C940-15IRH User Guide

Mode Suitable for

Tent mode

Watching movies

Tablet mode

Playing touch-enabled games

Turn on screen rotation lock

In stand, tent, or tablet mode, auto rotation is turned on so that the orientation of the screen changes based
on how you place or hold the computer. However, you can turn on rotation lock to keep the screen in a fixed
orientation.

Step 1. Select the action center icon in the Windows notification area.
Step 2. Select the Rotation lock icon to turn it on.

Note: Rotation lock is disabled in notebook mode.

Use Windows touch keyboard

In stand, tent, or tablet mode, the physical keyboard of your computer is disabled to prevent inadvertent
typing. In these three modes, Windows touch keyboard is automatically displayed when text input is

required. If it is not, select the touch keyboard icon (

Note: If you are not seeing the touch keyboard icon, tap and hold the taskbar and select Show touch
keyboard button.

) in the Windows notification area.

Chapter 2. Get started with your computer 15

Turn tablet mode on and off

Windows 10 provides the table mode that makes touch operations more friendly. When rotating your
computer screen to switch to tablet, stand, or tent mode, you will be prompted to switch to Windows tablet
mode. You can also manually turn Windows tablet mode on and off.

Step 1. Select the action center icon in the Windows notification area.
Step 2. Select the Tablet mode icon to turn it on or off.

Interact with your computer

Numeric keypad

The keyboard includes a dedicated numeric keypad on the far right. It is used for entering numbers and
operators quickly.

Press the NumLock key to enable or disable the numeric keypad.

Keyboard hotkeys

Some keys on the keyboard are printed with icons. These keys are called hotkeys and can be pressed alone
or in combination with the Fn key to access certain Windows functions or settings quickly. The functions of
hotkeys are symbolized by the icons printed on them.

Hotkey Function

Mute/Unmute sound.

Decrease/Increase system volume.

Mute/Unmute the microphones.

Reload Web pages or refresh the screen.

Enable/Disable the touchpad.

Turn on/off airplane mode.

Enable/Disable the integrated camera.

Lock the screen.

Switch display devices.

Increase/Decrease screen brightness.

Play/Pause the audio/video.

Stop the audio/video.

Play the previous audio/video track.

16 Lenovo Yoga C940-15IRH User Guide