Lenovo Thinkpad A275 User manual

A275 User Guide

Note: Before using this information and the product it supports, ensure that you read and understand the
following:
• Safety and Warranty Guide
• Setup Guide
• “ mportant safety information” on page v
Lenovo makes constant improvement on the documentation of your computer, including this User Guide. To
get all the latest documents, go to:
https://support.lenovo.com
Depending on the version of operating systems, some user interface instructions might not be applicable to
your computer.
Third Edition (September 2018)
© Copyright Lenovo 2017, 2018.
L M TED AND RESTR CTED R GHTS NOT CE: f 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. GS-
35F-05925.

Contents
mportant safety information . . . . . . v
Read this first. . . . . . . . . . . . . . . . . v
mportant information about using your computer . . v
Conditions that require immediate action . . . . . . vii
Service and upgrades . . . . . . . . . . . . viii
Power cords and power adapters . . . . . . . . . ix
Extension cords and related devices. . . . . . . . ix
Plugs and outlets . . . . . . . . . . . . . . . x
Power supply statement . . . . . . . . . . . . x
External devices . . . . . . . . . . . . . . . xi
General battery notice . . . . . . . . . . . . . xi
Notice for removable rechargeable battery . . . . . xi
Notice for built-in rechargeable battery. . . . . . . xii
Notice for non-rechargeable coin-cell battery . . . . xii
Heat and product ventilation . . . . . . . . . . xiii
Electrical current safety information . . . . . . . xiv
Liquid crystal display (LCD) notice . . . . . . . . xv
Using headphones or earphones . . . . . . . . . xv
Choking hazard notice . . . . . . . . . . . . . xv
Plastic bag notice . . . . . . . . . . . . . . . xv
Glass parts notice . . . . . . . . . . . . . . xvi
Chapter 1. Product overview . . . . . . 1
Computer controls, connectors, and indicators . . . 1
Front view . . . . . . . . . . . . . . . . 1
Left-side view. . . . . . . . . . . . . . . 2
Right-side view . . . . . . . . . . . . . . 3
Bottom view . . . . . . . . . . . . . . . 5
Status indicators . . . . . . . . . . . . . 5
mportant product information . . . . . . . . . . 7
Machine type and model label . . . . . . . . 7
FCC D and C Certification number . . . . . . 7
Labels for the Windows operating systems . . . 9
Computer features. . . . . . . . . . . . . . . 9
Computer specifications . . . . . . . . . . . 11
Operating environment . . . . . . . . . . . . 11
Lenovo programs . . . . . . . . . . . . . . 12
Accessing Lenovo programs . . . . . . . . 12
An introduction to Lenovo programs . . . . . 12
Chapter 2. Using your computer . . . 15
Registering your computer . . . . . . . . . . 15
Frequently asked questions . . . . . . . . . . 15
Getting help about the Windows operating
system . . . . . . . . . . . . . . . . . . 16
Using the multi-touch screen . . . . . . . . . 16
Using the special keys . . . . . . . . . . . . 18
Using the ThinkPad pointing device . . . . . . . 20
ThinkPad pointing device overview . . . . . 20
Using the TrackPoint pointing device. . . . . 21
Using the trackpad. . . . . . . . . . . . 22
Using the trackpad touch gestures . . . . . 23
Customizing the ThinkPad pointing device . . 24
Replacing the cap on the pointing stick . . . . 24
Power management . . . . . . . . . . . . . 25
Using the ac power adapter . . . . . . . . 25
Using the battery . . . . . . . . . . . . 25
Managing the battery power . . . . . . . . 27
Power-saving modes . . . . . . . . . . . 27
Cabled Ethernet connections . . . . . . . . . 28
Wireless connections . . . . . . . . . . . . 28
Using the wireless-LAN connection . . . . . 28
Using the wireless-WAN connection . . . . . 29
Using the Bluetooth connection. . . . . . . 30
Using the Airplane mode . . . . . . . . . 30
Using audio features . . . . . . . . . . . . . 30
Using the camera . . . . . . . . . . . . . . 31
Using a media card or a smart card . . . . . . . 32
Using an external display . . . . . . . . . . . 33
Traveling with your computer . . . . . . . . . 35
Finding ThinkPad options . . . . . . . . . . . 36
Chapter 3. Accessibility, ergonomic,
and maintenance information . . . . . 37
Accessibility information . . . . . . . . . . . 37
Ergonomic information . . . . . . . . . . . . 39
Cleaning and maintenance . . . . . . . . . . 40
Chapter 4. Security . . . . . . . . . . 43
Using passwords . . . . . . . . . . . . . . 43
Passwords introduction . . . . . . . . . . 43
Setting, changing, or removing a password . . 44
Hard disk security . . . . . . . . . . . . . . 45
Setting the security chip . . . . . . . . . . . 45
Using the fingerprint reader . . . . . . . . . . 46
Deleting data from your storage drive . . . . . . 48
Using firewalls . . . . . . . . . . . . . . . 49
Protecting data against viruses . . . . . . . . . 49
Chapter 5. Advanced
configuration . . . . . . . . . . . . . . 51
nstalling a new operating system . . . . . . . . 51
nstalling a Windows 7 operating system . . . 51
nstalling a Windows 10 operating system. . . 52
© Copyright Lenovo 2017, 2018 i

nstalling device drivers . . . . . . . . . . . . 53
Using the ThinkPad Setup program . . . . . . . 54
Configuring ThinkPad Setup . . . . . . . . 54
Changing the startup sequence . . . . . . . 55
Updating the UEF B OS. . . . . . . . . . 55
B OS menu. . . . . . . . . . . . . . . 56
Using system management . . . . . . . . . . 66
Chapter 6. Troubleshooting
computer problems . . . . . . . . . . 69
General tips for preventing problems . . . . . . 69
Diagnosing problems . . . . . . . . . . . . 69
Troubleshooting . . . . . . . . . . . . . . 70
Computer stops responding . . . . . . . . 70
Spills on the keyboard . . . . . . . . . . 71
Error messages . . . . . . . . . . . . . 71
Beep errors. . . . . . . . . . . . . . . 73
Memory module problems . . . . . . . . . 74
Ethernet problems . . . . . . . . . . . . 74
Wireless-LAN problem . . . . . . . . . . 75
Wireless-WAN problem . . . . . . . . . . 75
Bluetooth problem . . . . . . . . . . . . 76
ThinkPad pointing device problems . . . . . 76
Keyboard problems . . . . . . . . . . . 76
Computer screen problems . . . . . . . . 77
External monitor problems . . . . . . . . . 79
Audio problems . . . . . . . . . . . . . 80
Fingerprint reader problems . . . . . . . . 82
Battery problems . . . . . . . . . . . . 82
ac power adapter problem. . . . . . . . . 82
Power problems. . . . . . . . . . . . . 83
Power button problem . . . . . . . . . . 83
Boot problems . . . . . . . . . . . . . 83
Sleep and hibernation problems . . . . . . 84
Hard disk drive problems . . . . . . . . . 84
Solid-state drive problem . . . . . . . . . 85
Software problem . . . . . . . . . . . . 85
USB problem . . . . . . . . . . . . . . 85
Chapter 7. Recovery information . . . 87
Recovery information for the Windows 7 operating
system . . . . . . . . . . . . . . . . . . 87
Creating and using recovery media . . . . . 87
Reinstalling preinstalled programs and device
drivers . . . . . . . . . . . . . . . . 88
Recovery information for the Windows 10
operating system . . . . . . . . . . . . . . 89
Resetting your computer . . . . . . . . . 89
Using advanced startup options . . . . . . 89
Recovering your operating system if Windows
10 fails to start . . . . . . . . . . . . . 89
Creating and using a recovery USB drive . . . 89
Chapter 8. Replacing devices . . . . . 91
Customer Replaceable Units. . . . . . . . . . 91
Static electricity prevention . . . . . . . . . . 91
Disabling the built-in battery . . . . . . . . . . 92
Replacing the removable battery . . . . . . . . 92
Replacing the micro S M card . . . . . . . . . 94
Replacing the base cover assembly . . . . . . . 95
Replacing the wireless-WAN card. . . . . . . . 97
Replacing a memory module. . . . . . . . . . 98
Replacing the internal storage drive . . . . . . . 100
Replacing the dc-in cable . . . . . . . . . . . 107
Chapter 9. Getting support . . . . . . 111
Before you contact Lenovo . . . . . . . . . . 111
Getting help and service . . . . . . . . . . . 111
Lenovo Support Web site . . . . . . . . . 112
Calling Lenovo . . . . . . . . . . . . . 112
Purchasing additional services . . . . . . . . . 113
Appendix A. Regulatory
information . . . . . . . . . . . . . . . 115
Certification-related information . . . . . . . . 115
Wireless-related information . . . . . . . . . . 115
Wireless interoperability. . . . . . . . . . 115
Usage environment and your health . . . . . 115
Locating the UltraConnect wireless
antennas. . . . . . . . . . . . . . . . 116
Wireless-radio compliance information . . . . 116
Locating wireless regulatory notices . . . . . 116
TCO certification . . . . . . . . . . . . . . 117
Export classification notice . . . . . . . . . . 117
Electromagnetic emission notices. . . . . . . . 117
Federal Communications Commission (FCC)
Supplier’s Declaration of Conformity . . . . . 117
ndustry Canada Class B emission
compliance statement . . . . . . . . . . 117
European Union conformity . . . . . . . . 118
German Class B compliance statement. . . . 118
Japan VCC Class B compliance
statement . . . . . . . . . . . . . . . 119
Japan compliance statement for products
which connect to the power mains with rated
current less than or equal to 20 A per
phase . . . . . . . . . . . . . . . . . 119
Japan notice for ac power cord . . . . . . . 119
Lenovo product service information for Taiwan . . 119
Taiwan precautionary vision statement . . . . . . 119
Eurasian compliance mark . . . . . . . . . . 119
Brazil audio notice . . . . . . . . . . . . . . 119
ii A275 User Guide

Appendix B. WEEE and recycling
statements of countries and
regions . . . . . . . . . . . . . . . . . 121
General recycling information . . . . . . . . . 121
mportant WEEE information . . . . . . . . . . 121
Japan recycling statements . . . . . . . . . . 122
Recycling information for Brazil. . . . . . . . . 122
Battery recycling information for the European
Union . . . . . . . . . . . . . . . . . . . 123
Battery recycling information for Taiwan . . . . . 124
Battery recycling information for the United States
and Canada . . . . . . . . . . . . . . . . 124
Recycling information for China . . . . . . . . 124
Appendix C. Restriction of
Hazardous Substances (RoHS) Directive
of countries and regions . . . . . . . . 125
Appendix D. Notices. . . . . . . . . . 129
Appendix E. Trademarks . . . . . . . 131
© Copyright Lenovo 2017, 2018 iii

iv A275 User Guide

mportant safety information
Note: Read the important safety information first.
Read this first
This information can help you safely use your notebook computer. Follow and retain all information included
with your computer. The information in this document does not alter the terms of your purchase agreement
or the Limited Warranty. For more information, see "Warranty nformation" in the Safety and Warranty Guide
that comes with your computer.
Customer safety is important. Our products are developed to be safe and effective. However, personal
computers are electronic devices. Power cords, power adapters, and other features can create potential
safety risks that can result in physical injury or property damage, especially if misused. To reduce these risks,
follow the instructions included with your product, observe all warnings on the product and in the operating
instructions, and review the information included in this document carefully. By carefully following the
information contained in this document and provided with your product, you can help protect yourself from
hazards and create a safer computer work environment.
Note: This information includes references to power adapters and batteries. n addition to notebook
computers, some products (such as speakers and monitors) ship with external power adapters. f you have
such a product, this information applies to your product. n addition, computer products contain a coin-sized
internal battery that provides power to the system clock even when the computer is unplugged, so the
battery safety information applies to all computer products.
mportant information about using your computer
Ensure that you follow the important tips given here to get the most use and enjoyment out of your computer.
Failure to do so might lead to discomfort or injury, or cause the computer to fail.
Protect yourself from the heat that your computer generates.
When your computer is turned on or the battery is charging, the base, the palm
rest, and some other parts may become hot. The temperature they reach
depends on the amount of system activity and the level of charge in the
battery.
Extended contact with your body, even through clothing, could cause
discomfort or even a skin burn.
• Avoid keeping your hands, your lap, or any other part of your body in
contact with a hot section of the computer for any extended time.
• Periodically take hands from using the keyboard by lifting your hands from
the palm rest.
© Copyright Lenovo 2017, 2018 v

Protect yourself from the heat generated by the ac power adapter.
When the ac power adapter is connected to an electrical outlet and your
computer, it generates heat.
Extended contact with your body, even through clothing, may cause a skin
burn.
• Do not place the ac power adapter in contact with any part of your body
while it is in use.
• Never use it to warm your body.
• Do not wrap the cords around the ac power adapter while in use.
Prevent your computer from getting wet.
To avoid spills and the danger of electrical shock, keep liquids away from your
computer.
Protect the cables from being damaged.
Applying strong force to cables may damage or break them.
Route communication lines, or the cables of an ac power adapter, a mouse, a
keyboard, a printer, or any other electronic device, so that they cannot be
walked on, tripped over, pinched by your computer or other objects, or in any
way subject to treatment that could interfere with the operation of your
computer.
Protect your computer and data when moving it.
Before moving a computer equipped with a hard disk drive, do one of the
following:
• Turn it off.
• Put it in sleep mode.
• Put it in hibernation mode.
This helps to prevent damage to the computer, and possible loss of data.
vi A275 User Guide

Handle your computer gently.
Do not drop, bump, scratch, twist, hit, vibrate, push, or place heavy objects on
your computer, display, or external devices.
Carry your computer carefully.
• Use a quality carrying case that provides adequate cushioning and protection.
• Do not pack your computer in a tightly packed suitcase or bag.
• Before putting your computer in a carrying case, make sure that it is off, in sleep
mode, or in hibernation mode. Do not put a computer in a carrying case while it is
turned on.
Conditions that require immediate action
Products can become damaged due to misuse or neglect. Some product damage is serious enough
that the product should not be used again until it has been inspected and, if necessary, repaired by an
authorized servicer.
As with any electronic device, pay close attention to the product when it is turned on. On very rare
occasions, you might notice an odor or see a puff of smoke or sparks vent from your product. Or you
might hear sounds like popping, cracking, or hissing. These conditions might merely mean that an
internal electronic component has failed in a safe and controlled manner. Or, they might indicate a
potential safety issue. However, do not take risks or attempt to diagnose the situation yourself.
Contact the Customer Support Center for further guidance. For a list of Service and Support phone
numbers, see the following Web site:
https://pcsupport.lenovo.com/supportphonelist
Frequently inspect your computer and its components for damage or wear or signs of danger. f you
have any question about the condition of a component, do not use the product. Contact the Customer
Support Center or the product manufacturer for instructions on how to inspect the product and have it
repaired, if necessary.
n the unlikely event that you notice any of the following conditions, or if you have any safety concerns
with your product, stop using the product and unplug it from the power source and
telecommunication lines until you can speak to the Customer Support Center for further guidance.
© Copyright Lenovo 2017, 2018 vii

• Power cords, plugs, power adapters, extension cords, surge protectors, or power supplies that are
cracked, broken, or damaged.
• Signs of overheating, smoke, sparks, or fire.
• Damage to a battery (such as cracks, dents, or creases), discharge from a battery, or a buildup of foreign
substances on the battery.
• A cracking, hissing, or popping sound, or strong odor that comes from the product.
• Signs that liquid has been spilled or an object has fallen onto the computer product, the power cord, or
power adapter.
• The computer product, power cord, or power adapter has been exposed to water.
• The product has been dropped or damaged in any way.
• The product does not operate normally when you follow the operating instructions.
Note: f you notice these conditions with a product (such as an extension cord) that is not manufactured for
or by Lenovo®, stop using that product until you can contact the product manufacturer for further
instructions, or until you get a suitable replacement.
Service and upgrades
Do not attempt to service a product yourself unless instructed to do so by the Customer Support Center or
your documentation. Only use a Service Provider who is approved to repair your particular product.
Note: Some computer parts can be upgraded or replaced by the customer. Upgrades typically are referred
to as options. Replacement parts approved for customer installation are referred to as Customer
Replaceable Units, or CRUs. Lenovo provides documentation with instructions when it is appropriate for
customers to install options or replace CRUs. You must closely follow all instructions when installing or
replacing parts. The Off state of a power indicator does not necessarily mean that voltage levels inside a
product are zero. Before you remove the covers from a product equipped with a power cord, always make
sure that the power is turned off and that the product is unplugged from any power source. f you have any
questions or concerns, contact the Customer Support Center.
Although there are no moving parts in your computer after the power cord has been disconnected, the
following warnings are required for your safety.
CAUT ON:
Hazardous moving parts. Keep fingers and other body parts away.
CAUT ON:
Before you open the computer cover, turn off the computer and wait several minutes until the
computer is cool.
viii A275 User Guide

Power cords and power adapters
DANGER
Use only the power cords and power adapters supplied by the product manufacturer.
The power cords shall be safety approved. For Germany, it shall be H03VV-F, 3G, 0.75 mm2, or
better. For other countries, the suitable types shall be used accordingly.
Never wrap a power cord around a power adapter or other object. Doing so can stress the cord in
ways that can cause the cord to fray, crack, or crimp. This can present a safety hazard.
Always route power cords so that they will not be walked on, tripped over, or pinched by objects.
Protect power cords and power adapters from liquids. For instance, do not leave your power cord
or power adapter near sinks, tubs, toilets, or on floors that are cleaned with liquid cleansers. Liquids
can cause a short circuit, particularly if the power cord or power adapter has been stressed by
misuse. Liquids also can cause gradual corrosion of power cord terminals and/or the connector
terminals on a power adapter, which can eventually result in overheating.
Ensure that all power cord connectors are securely and completely plugged into receptacles.
Do not use any power adapter that shows corrosion at the ac input pins or shows signs of
overheating (such as deformed plastic) at the ac input pins or anywhere on the power adapter.
Do not use any power cords where the electrical contacts on either end show signs of corrosion or
overheating or where the power cord appears to have been damaged in any way.
To prevent possible overheating, do not cover the power adapter with clothing or other objects
when the power adapter is plugged into an electrical outlet.
Extension cords and related devices
Ensure that extension cords, surge protectors, uninterruptible power supplies, and power strips that you use
are rated to handle the electrical requirements of the product. Never overload these devices. f power strips
are used, the load should not exceed the power strip input rating. Consult an electrician for more information
if you have questions about power loads, power requirements, and input ratings.
© Copyright Lenovo 2017, 2018 ix

Plugs and outlets
DANGER
f a receptacle (power outlet) that you intend to use with your computer equipment appears to be
damaged or corroded, do not use the outlet until it is replaced by a qualified electrician.
Do not bend or modify the plug. f the plug is damaged, contact the manufacturer to obtain a
replacement.
Do not share an electrical outlet with other home or commercial appliances that draw large
amounts of electricity; otherwise, unstable voltage might damage your computer, data, or attached
devices.
Some products are equipped with a three-pronged plug. This plug fits only into a grounded
electrical outlet. This is a safety feature. Do not defeat this safety feature by trying to insert it into a
non-grounded outlet. f you cannot insert the plug into the outlet, contact an electrician for an
approved outlet adapter or to replace the outlet with one that enables this safety feature. Never
overload an electrical outlet. The overall system load should not exceed 80 percent of the branch
circuit rating. Consult an electrician for more information if you have questions about power loads
and branch circuit ratings.
Be sure that the power outlet you are using is properly wired, easily accessible, and located close to
the equipment. Do not fully extend power cords in a way that will stress the cords.
Be sure that the power outlet provides the correct voltage and current for the product you are
installing.
Carefully connect and disconnect the equipment from the electrical outlet.
Power supply statement
DANGER
Never remove the cover on a power supply or any part that has the following label attached.
Hazardous voltage, current, and energy levels are present inside any component that has this label
attached. There are no serviceable parts inside these components. f you suspect a problem with
one of these parts, contact a service technician.
xA275 User Guide

External devices
CAUT ON:
Do not connect or disconnect any external device cables other than Universal Serial Bus (USB) and
1394 cables while the computer power is on; otherwise, you might damage your computer. To avoid
possible damage to attached devices, wait at least five seconds after the computer is shut down to
disconnect external devices.
General battery notice
DANGER
Batteries supplied by Lenovo for use with your product have been tested for compatibility and
should only be replaced with approved parts. A battery other than the one specified by Lenovo, or a
disassembled or modified battery is not covered by the warranty.
Battery abuse or mishandling can cause overheat, liquid leakage, or an explosion. To avoid possible
injury, do the following:
• Do not open, dissemble, or service any battery.
• Do not crush or puncture the battery.
• Do not short-circuit the battery, or expose it to water or other liquids.
• Keep the battery away from children.
• Keep the battery away from fire.
Stop using the battery if it is damaged, or if you notice any discharge or the buildup of foreign
materials on the battery leads.
Store the rechargeable batteries or products containing the rechargeable batteries at room
temperature, charged to approximately 30 to 50% of capacity. We recommend that the batteries be
charged about once per year to prevent overdischarge.
Do not put the battery in trash that is disposed of in landfills. When disposing of the battery, comply
with local ordinances or regulations.
Notice for removable rechargeable battery
DANGER
Only recharge the battery strictly according to instructions included in the product documentation.
f the battery is incorrectly replaced, there is danger of an explosion. The battery contains a small
amount of harmful substances.
© Copyright Lenovo 2017, 2018 xi

Notice for built-in rechargeable battery
DANGER
Do not attempt to remove or replace the built-in rechargeable battery. Replacement of the battery
must be done by a Lenovo-authorized repair facility or technician.
Only recharge the battery strictly according to instructions included in the product documentation.
The Lenovo-authorized repair facilities or technicians recycle Lenovo batteries according to local
laws and regulations.
Notice for non-rechargeable coin-cell battery
DANGER
Do not attempt to replace the non-rechargeable coin-cell battery. Replacement of the battery must
be done by a Lenovo-authorized repair facility or technician.
The Lenovo-authorized repair facilities or technicians recycle Lenovo batteries according to local
laws and regulations.
The following statement applies to users in the state of California, U.S.A.
California Perchlorate nformation:
Products containing manganese dioxide lithium coin-cell batteries may contain perchlorate.
Perchlorate Material - special handling may apply, See https://www.dtsc.ca.gov/hazardouswaste/
perchlorate/
xii A275 User Guide

Heat and product ventilation
DANGER
Computers, ac power adapters, and many accessories can generate heat when turned on and when
batteries are charging. Notebook computers can generate a significant amount of heat due to their
compact size. Always follow these basic precautions:
• When your computer is turned on or the battery is charging, the base, the palm rest, and some
other parts may become hot. Avoid keeping your hands, your lap, or any other part of your body
in contact with a hot section of the computer for any extended length of time. When you use the
keyboard, avoid keeping your palms on the palm rest for a prolonged period of time. Your
computer generates some heat during normal operation. The amount of heat depends on the
amount of system activity and the battery charge level. Extended contact with your body, even
through clothing, could cause discomfort or even a skin burn. Periodically take breaks from using
the keyboard by lifting your hands from the palm rest; and be careful not to use the keyboard for
any extended length of time.
• Do not operate your computer or charge the battery near flammable materials or in explosive
environments.
• Ventilation slots, fans and/or heat sinks are provided with the product for safety, comfort, and
reliable operation. These features might inadvertently become blocked by placing the product on
a bed, sofa, carpet, or other flexible surface. Never block, cover, or disable these features.
• When the ac power adapter is connected to an electrical outlet and your computer, it generates
heat. Do not place the adapter in contact with any part of your body while using it. Never use the
ac power adapter to warm your body. Extended contact with your body, even through clothing,
may cause a skin burn.
For your safety, always follow these basic precautions with your computer:
• Keep the cover closed whenever the computer is plugged in.
• Regularly inspect the outside of the computer for dust accumulation.
• Remove dust from vents and any perforations in the bezel. More frequent cleanings might be
required for computers in dusty or high-traffic areas.
• Do not restrict or block any ventilation openings.
• Do not operate your computer inside furniture, as this might increase the risk of overheating.
• Airflow temperatures into the computer should not exceed 35°C (95°F).
© Copyright Lenovo 2017, 2018 xiii

Electrical current safety information
DANGER
Electric current from power, telephone, and communication cables is hazardous.
To avoid a shock hazard:
• Do not use your computer during a lightning storm.
• Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration
of this product during an electrical storm.
• Connect all power cords to a properly wired and grounded electrical outlet.
• Connect to properly wired outlets any equipment that will be attached to this product.
• Whenever possible, use one hand only to connect or disconnect signal cables.
• Never turn on any equipment when there is evidence of fire, water, or structural damage.
• Disconnect the attached power cords, battery, and all the cables before you open the device
covers, unless instructed otherwise in the installation and configuration procedures.
• Do not use your computer until all internal parts enclosures are fastened into place. Never use
the computer when internal parts and circuits are exposed.
DANGER
Connect and disconnect cables as described in the following procedures when installing, moving,
or opening covers on this product or attached devices.
To connect:
1. Turn everything OFF.
2. First, attach all cables to devices.
3. Attach signal cables to connectors.
4. Attach power cords to outlets.
5. Turn devices ON.
To disconnect:
1. Turn everything OFF.
2. First, remove power cords from outlets.
3. Remove signal cables from connectors.
4. Remove all cables from devices.
The power cord must be disconnected from the wall outlet or receptacle before installing all other electrical
cables connected to the computer.
The power cord may be reconnected to the wall outlet or receptacle only after all other electrical cables have
been connected to the computer.
DANGER
During electrical storms, do not perform any replacement and do not connect the telephone cable
to or disconnect it from the telephone outlet on the wall.
xiv A275 User Guide

Liquid crystal display (LCD) notice
CAUT ON:
The liquid crystal display (LCD) is made of glass, and rough handling or dropping the computer can
cause the LCD to break. f the LCD breaks and the internal fluid gets into your eyes or on your hands,
immediately wash the affected areas with water for at least 15 minutes; if any symptoms are present
after washing, get medical care.
Note: For products with mercury-containing fluorescent lamps (for example, non-LED), the fluorescent lamp
in the liquid crystal display (LCD) contains mercury; dispose of according to local, state, or federal laws.
Using headphones or earphones
CAUT ON:
Excessive sound pressure from earphones and headphones can cause hearing loss. Adjustment of
the equalizer to maximum increases the earphone and headphone output voltage and the sound
pressure level. Therefore, to protect your hearing, adjust the equalizer to an appropriate level.
Excessive use of headphones or earphones for a long period of time at high volume can be dangerous if the
output of the headphone or earphone connectors do not comply with specifications of EN 50332-2. The
headphone output connector of your computer complies with EN 50332-2 Sub clause 7. This specification
limits the computer’s maximum wide band true RMS output voltage to 150 mV. To help protect against
hearing loss, ensure that the headphones or earphones you use also comply with EN 50332-2 (Clause 7
limits) for a wide band characteristic voltage of 75 mV. Using headphones that do not comply with EN 50332-
2 can be dangerous due to excessive sound pressure levels.
f your Lenovo computer came with headphones or earphones in the package, as a set, the combination of
the headphones or earphones and the computer already complies with the specifications of EN 50332-1. f
different headphones or earphones are used, ensure that they comply with EN 50332-1 (Clause 6.5
Limitation Values). Using headphones that do not comply with EN 50332-1 can be dangerous due to
excessive sound pressure levels.
Choking hazard notice
CHOK NG HAZARD – Product contains small parts.
Keep away from children under three years.
Plastic bag notice
DANGER
Plastic bags can be dangerous. Keep plastic bags away from babies and children to avoid danger of
suffocation.
© Copyright Lenovo 2017, 2018 xv

Glass parts notice
CAUT ON:
Some parts of your product may be made of glass. This glass could break if the product is dropped on
a hard surface or receives a substantial impact. f glass breaks, do not touch or attempt to remove it.
Stop using your product until the glass is replaced by trained service personnel.
xvi A275 User Guide

Chapter 1. Product overview
This chapter provides basic information to help you get familiar with your computer.
Computer controls, connectors, and indicators
This section introduces hardware features of the computer.
Front view
1 Camera (available on some models) 2 Microphones (available on some models)
3 Power button 4 Fingerprint reader (available on some models)
5 TrackPoint® pointing stick 6 TrackPoint buttons
7 Trackpad
1 Camera (available on some models)
The camera enables you to take pictures or hold a video conference. For more information, see “Using the
camera” on page 31.
2 Microphones (available on some models)
The microphones capture sound and voice when used with a program capable of handling audio.
3 Power button
You can press the power button to turn on the computer or put the computer into sleep mode.
To turn off the computer, do the following:
• For Windows® 7: Open the Start menu and click Shut down.
• For Windows 10: Open the Start menu, click Power, and then click Shut down.
© Copyright Lenovo 2017, 2018 1

f your computer is unresponsive, you can turn off the computer by pressing and holding the power button
for four or more seconds. f the computer cannot be turned off, see “Computer stops responding” on page
70.
You also can define what the power button does. For example, by pressing the power button, you can turn
off the computer or put the computer into sleep or hibernation mode. To change what the power button
does, do the following:
1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or Small
icons.
2. Click Power Options ➙ Choose what the power buttons do.
3. Follow the instructions on the screen.
4 Fingerprint reader (available on some models)
Fingerprint authentication provides simple and secure user access by associating your fingerprint with a
password. For more information, see “Using the fingerprint reader” on page 46.
ThinkPad® pointing device
5 TrackPoint pointing stick
6 TrackPoint buttons
7 Trackpad
Your computer is equipped with the Lenovo-unique ThinkPad pointing device. For more information, see
“Using the ThinkPad pointing device” on page 20.
Left-side view
1 Power connector 2 Fan louvers
3 USB-C connector 4 HDM ™ connector
5 USB 3.0 connector 6 Smart-card slot (available on some models)
1 Power connector
The power connector enables you to connect the computer to ac power.
2 Fan louvers
The fan louvers and internal fan enable air to circulate in the computer to ensure proper cooling, especially
the cooling of the microprocessor.
Note: To ensure proper airflow, do not place any obstacles in front of the fan louvers.
3 USB-C connector
The USB-C connector supports the latest USB 3.1 standard. With a proper USB-C adapter connected, you
can:
• Transfer data between your computer and peripheral devices.
• Charge your computer.
• Charge your peripheral devices.
2A275 User Guide