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Lenovo ThinkPad T540p (English) User Guide - Page 158

Battery and power problems, Battery problems, An ac power adapter problem, Power problems - charger

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For tips on how to maintain the fingerprint reader, refer to Maintaining the fingerprint reader. Battery and power problems This topic contains instructions on troubleshooting battery and power problems. Battery problems • Problem: The battery pack cannot be fully charged in the standard charge time when the computer is powered off. Solution: The battery pack might be over-discharged. Do the following: 1. Turn off the computer. 2. Make sure that the over-discharged battery pack is in the computer. 3. Connect the ac power adapter to the computer and let it charge. If a quick charger is available, use it to charge the over-discharged battery pack. If the battery pack cannot be fully charged in 24 hours, use a new battery pack. • Problem: The computer shuts down before the battery status icon shows that the battery is empty, or the computer operates after the battery status icon shows that the battery is empty. Solution: Discharge and recharge the battery pack. • Problem: The operating time for a fully charged battery pack is short. Solution: Discharge and recharge the battery pack. If your battery operating time is still short, use a new battery pack. • Problem: The computer does not operate with a fully charged battery pack. Solution: The surge protector in the battery pack might be active. Turn off the computer for one minute to reset the protector; then turn on the computer again. • Problem: The battery pack cannot be charged. Solution: You cannot charge the battery when it is too hot. If the battery feels hot, remove it from the computer and allow it to cool to room temperature. After it cools, reinstall it and recharge the battery. If it still cannot be charged, have it serviced. An ac power adapter problem Problem: The ac power adapter is connected to the computer and the working electrical outlet, but the power adapter (power plug) icon is not displayed in the Windows notification area. Also the ac power indicator does not light up. Solution: Do the following: 1. Make sure that the connection of the ac power adapter is correct. For instructions on connecting the ac power adapter, see Safety, Warranty, and Setup Guide that comes with your computer. 2. If the connection of the ac power adapter is correct, turn off the computer, then disconnect the ac power adapter and remove the main battery. 3. Reinstall the battery and reconnect the ac power adapter, then turn on the computer. 4. If the power adapter icon still is not displayed in the Windows notification area, have the ac power adapter and your computer serviced. Power problems Print these instructions now and keep it with your computer for reference later. 142 User Guide

Section	Page
Read this first	7
Important safety information	8
Conditions that require immediate action	9
Safety guidelines	9
Chapter 1. Product overview	17
Locating computer controls, connectors, and indicators	17
Front view	17
Right-side view	19
Left-side view	20
Bottom view	22
Rear view	23
Status indicators	23
Locating important product information	25
Machine type and model	25
FCC ID and IC Certification number	25
Certificate of Authenticity	26
Genuine Microsoft label	27
Features	27
Specifications	29
Operating environment	29
Lenovo programs	30
Accessing Lenovo programs on the Windows 7 operating system	30
Accessing Lenovo programs on the Windows 8 or Windows 8.1 operating system	32
Lenovo programs overview	33
Chapter 2. Using your computer	35
Registering your computer	35
Frequently asked questions	35
Special keys	37
Using the ThinkPad pointing device	39
Power management	40
Checking the battery status	41
Using the ac power adapter	41
Charging the battery	42
Maximizing the battery life	42
Managing the power plans	42
Power-saving modes	43
Handling the battery	44
Connecting to the network	45
Ethernet connections	45
Wireless connections	45
Presentations and multimedia	49
Changing display settings	49
Connecting a projector or an external monitor	49
Setting up a presentation	52
Using dual displays	53
Using the NVIDIA Optimus Graphics feature	53
Using the color sensor	54
Using audio features	54
Using the camera	55
Using the optical drive	55
Using an ExpressCard, a flash media card, or a smart card	56
Installing an ExpressCard, a flash media card, or a smart card	56
Removing an ExpressCard, a flash media card, or a smart card	57
Chapter 3. You and your computer	59
Accessibility and comfort	59
Ergonomic information	59
Comfort	60
Accessibility information	60
Traveling with your computer	61
Travel tips	61
Travel accessories	61
Chapter 4. Security	63
Using passwords	63
Typing passwords	63
Power-on password	63
Supervisor password	64
Hard disk passwords	65
Hard disk security	67
Setting the security chip	68
Using the fingerprint reader	69
Notice on deleting data from your hard disk drive or solid-state drive	72
Using firewalls	73
Protecting data against viruses	73
Chapter 5. Recovery overview	75
Recovery overview for the Windows 7 operating system	75
Creating and using a recovery media	75
Performing backup and recovery operations	76
Using the Rescue and Recovery workspace	77
Creating and using a rescue medium	78
Reinstalling preinstalled programs and device drivers	79
Solving recovery problems	79
Recovery overview for the Windows 8 and Windows 8.1 operating systems	80
Refreshing your computer	80
Resetting your computer to the factory default settings	80
Using the advanced startup options	81
Recovering your operating system if Windows 8 or Windows 8.1 fails to start	81
Creating and using recovery media	82
Chapter 6. Replacing devices	85
Static electricity prevention	85
Replacing the battery pack	85
Installing or replacing the SIM card	87
Replacing the Ultrabay device	88
Replacing a memory module	91
Replacing the hard disk drive or solid-state drive	93
Replacing a wireless LAN card	96
Replacing a wireless WAN card	99
Replacing the coin-cell battery	103
Replacing the keyboard	105
Chapter 7. Enhancing your computer	111
Finding ThinkPad options	111
ThinkPad docking stations	111
Locating controls and connectors on the ThinkPad docking stations	111
Attaching a ThinkPad docking station	116
Detaching a ThinkPad docking station	117
Connecting external displays to a docking station	118
Security features	119
Chapter 8. Advanced configuration	121
Installing a new operating system	121
Installing the Windows 7 operating system	121
Installing the Windows 8 or Windows 8.1 operating system	122
Installing device drivers	123
Using the ThinkPad Setup program	123
Main menu	124
Config menu	124
Date and Time menu	130
Security menu	130
Startup menu	136
Restart menu	138
Updating your system UEFI BIOS	138
Using system management	139
Setting management features	139
Chapter 9. Preventing problems	141
General tips for preventing problems	141
Making sure device drivers are current	142
Taking care of your computer	143
Cleaning the cover of your computer	144
Chapter 10. Troubleshooting computer problems	147
Diagnosing problems	147
Troubleshooting	147
Computer stops responding	147
Spills on the keyboard	148
Error messages	148
Errors without messages	150
Beep errors	151
Memory module problems	151
Networking problems	151
Problems with the keyboard and other pointing devices	153
Problems with the display and multimedia devices	154
Fingerprint reader problems	157
Battery and power problems	158
Problems with drives and other storage devices	160
A software problem	162
Problems with ports and connectors	162
Chapter 11. Getting support	163
Before you contact Lenovo	163
Getting help and service	163
Using diagnostic programs	164
Lenovo Support Web site	164
Calling Lenovo	164
Purchasing additional services	165
Appendix A. Regulatory information	167
Wireless related information	167
Location of the UltraConnect wireless antennas	168
Locating wireless regulatory notices	169
Export classification notice	169
Electronic emission notices	169
Federal Communications Commission Declaration of Conformity	169
Industry Canada Class B emission compliance statement	170
European Union - Compliance to the Electromagnetic Compatibility Directive	170
German Class B compliance statement	170
Korea Class B compliance statement	171
Japan VCCI Class B compliance statement	171
Japan compliance statement for products which connect to the power mains with rated current less than or equal to 20 A per phase	171
Lenovo product service information for Taiwan	171
Appendix B. WEEE and recycling statements	173
Important WEEE information	173
Japan recycling statements	173
Recycling information for Brazil	174
Battery recycling information for the European Union	174
Battery recycling information for Taiwan	175
Battery recycling information for the United States and Canada	175
Recycling information for China	175
Appendix C. ENERGY STAR model information	177
Appendix D. Notices	179
Trademarks	180
Appendix E. Restriction of Hazardous Substances Directive (RoHS)	181
European Union RoHS	181
China RoHS	181
India RoHS	181
Turkish RoHS	181
Ukraine RoHS	182

Match case Limit results 1 per page

For tips on how to maintain the ﬁngerprint reader, refer to Maintaining the ﬁngerprint reader.

Battery and power problems

This topic contains instructions on troubleshooting battery and power problems.

Battery problems

•

Problem

: The battery pack cannot be fully charged in the standard charge time when the computer is

powered off.

Solution

: The battery pack might be over-discharged. Do the following:

1. Turn off the computer.

2. Make sure that the over-discharged battery pack is in the computer.

3. Connect the ac power adapter to the computer and let it charge.

If a quick charger is available, use it to charge the over-discharged battery pack.

If the battery pack cannot be fully charged in 24 hours, use a new battery pack.

•

Problem

: The computer shuts down before the battery status icon shows that the battery is empty, or the

computer operates after the battery status icon shows that the battery is empty.

Solution

: Discharge and recharge the battery pack.

•

Problem

: The operating time for a fully charged battery pack is short.

Solution

: Discharge and recharge the battery pack. If your battery operating time is still short, use a

new battery pack.

•

Problem

: The computer does not operate with a fully charged battery pack.

Solution

: The surge protector in the battery pack might be active. Turn off the computer for one minute to

reset the protector; then turn on the computer again.

•

Problem

: The battery pack cannot be charged.

Solution

: You cannot charge the battery when it is too hot. If the battery feels hot, remove it from the

computer and allow it to cool to room temperature. After it cools, reinstall it and recharge the battery. If it

still cannot be charged, have it serviced.

An ac power adapter problem

Problem

: The ac power adapter is connected to the computer and the working electrical outlet, but the

power adapter (power plug) icon is not displayed in the Windows notiﬁcation area. Also the ac power

indicator does not light up.

Solution

: Do the following:

1. Make sure that the connection of the ac power adapter is correct. For instructions on connecting the ac

power adapter, see

Safety, Warranty, and Setup Guide

that comes with your computer.

2. If the connection of the ac power adapter is correct, turn off the computer, then disconnect the ac power

adapter and remove the main battery.

3. Reinstall the battery and reconnect the ac power adapter, then turn on the computer.

4. If the power adapter icon still is not displayed in the Windows notiﬁcation area, have the ac power

adapter and your computer serviced.

Power problems

Print these instructions now and keep it with your computer for reference later.

142

User Guide