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Lenovo ThinkPad Yoga 12 (English) User Guide - ThinkPad Yoga 12 - Page 107

Problems with the display and multimedia devices, Computer screen problems

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1. Turn off the computer. 2. Remove the external numeric keypad. 3. Turn on the computer and try using the keyboard again. If the keyboard problem is resolved, carefully reconnect the external numeric keypad and the external keyboard. Ensure that you have seated the connectors correctly. If the problem persists, ensure that the correct device driver is installed by doing the following: 1. Open Control Panel. Change the view of Control Panel from Category to Large icons or Small icons. 2. Click Keyboard. 3. Select the Hardware tab. In the Device Properties pane, ensure that you see this message: Device Status: This device is working properly. If keys on the keyboard still do not work, have the computer serviced. • Problem: All or some keys on the external numeric keypad do not work. Solution: Ensure that the external numeric keypad is correctly connected to the computer. Problems with the display and multimedia devices This topic includes the most common problems with displays and multimedia devices, including the computer display, the external monitor, and audio devices. Computer screen problems • Problem: The screen is blank. Solution: Do the following: - Press the display mode-switching key to bring up the image. - If you are using the ac power adapter, or using the battery and the battery gauge shows that the battery is not depleted, press the brightness-up key to make the screen brighter. - If your computer is in sleep mode, press Fn to resume from the sleep mode. - If the problem persists, follow the solution for the following problem. • Problem: The screen is unreadable or distorted. Solution: Ensure that: - The display device driver is installed correctly. - The screen resolution and color quality are correctly set. - The monitor type is correct. To check these settings, do the following: 1. Connect the external monitor to your computer, and then connect the monitor to an electrical outlet. 2. Turn on the external monitor. 3. Right-click on the desktop, and click Screen resolution. Note: If your computer cannot detect the external monitor, click the Detect button. 4. Select the external monitor and set Resolution. 5. Click Advanced Settings. 6. Click the Monitor tab.Check the monitor information to ensure that the monitor type is correct. If the monitor type is correct, click OK to close the window; otherwise proceed with the following steps. Chapter 7. Troubleshooting computer problems 91

Section	Page
Read this first	7
Important safety information	8
Conditions that require immediate action	9
Service and upgrades	9
Power cords and power adapters	10
Extension cords and related devices	11
Plugs and outlets	11
Power supply statement	11
External devices	12
General battery notice	12
Notice for built-in rechargeable battery	12
Notice for non-rechargeable coin-cell battery	13
Heat and product ventilation	13
Electrical current safety information	14
Liquid crystal display (LCD) notice	15
Using headphones or earphones	15
Additional safety information	15
Chapter 1. Product overview	17
Locating computer controls, connectors, and indicators	17
Front view	17
Right-side view	19
Left-side view	21
Bottom view	22
Rear view	22
Status indicators	23
Locating important product information	24
Machine type and model label	24
FCC ID and IC Certification information	24
Certificate of Authenticity label	25
Genuine Microsoft label	25
Features	26
Specifications	27
Operating environment	28
Lenovo programs	28
Accessing Lenovo programs on the Windows 7 operating system	28
Accessing Lenovo programs on the Windows 8.1 operating system	29
An introduction to Lenovo programs	30
Chapter 2. Using your computer	33
Registering your computer	33
Frequently asked questions	33
Using the special buttons	35
Using the multi-touch screen	36
Using the Tablet Digitizer Pen or ThinkPad Active Pen	39
Operating modes	42
Enabling the operating modes	43
Rotating the computer display	43
Notebook mode	43
Stand mode	44
Tablet mode	45
Tent mode	47
Using the keyboard	48
Special keys	50
ThinkPad pointing device	51
TrackPoint pointing device	52
Trackpad	53
Trackpad touch gestures	54
Customizing the ThinkPad pointing device	55
Replacing the cap of the TrackPoint pointing stick	55
Power management	56
Checking the battery status	56
Using the ac power	57
Charging the battery	57
Maximizing the battery life	58
Managing the battery power	58
Power-saving modes	58
Connecting to the network	59
Ethernet connections	59
Wireless connections	59
Using an external display	62
Connecting an external display	62
Choosing a display mode	63
Changing display settings	63
Using audio features	63
Using the camera	64
Using a flash media card	64
Chapter 3. Enhancing your computer	67
Finding ThinkPad options	67
ThinkPad OneLink Dock	67
ThinkPad OneLink Pro Dock	68
Chapter 4. Security	71
Using passwords	71
Typing passwords	71
Power-on password	71
Supervisor password	72
Hard disk passwords	73
Hard disk security	75
Setting the security chip	76
Notice on deleting data from your storage drive	77
Using firewalls	78
Protecting data against viruses	78
Chapter 5. Advanced configuration	79
Installing a new operating system	79
Installing the Windows 7 operating system	79
Installing the Windows 8.1 operating system	80
Installing device drivers	81
Using the ThinkPad Setup program	81
Main menu	82
Config menu	82
Date and Time menu	85
Security menu	85
Startup menu	90
Restart menu	92
Updating the UEFI BIOS	92
Using system management	92
Chapter 6. Preventing problems	95
General tips for preventing problems	95
Making sure device drivers are current	96
Taking care of your computer	97
Cleaning the cover of your computer	98
Chapter 7. Troubleshooting computer problems	101
Diagnosing problems	101
Troubleshooting	101
Computer stops responding	101
Spills on the keyboard	102
Error messages	102
Beep errors	104
Memory module problems	104
Networking problems	104
Problems with the keyboard and other pointing devices	106
Problems with the display and multimedia devices	107
Battery and power problems	112
Problems with drives and other storage devices	115
A software problem	115
Problems with ports and connectors	116
Chapter 8. Recovery overview	117
Recovery overview for the Windows 7 operating system	117
Creating and using a recovery media	117
Performing backup and recovery operations	118
Using the Rescue and Recovery workspace	119
Creating and using a rescue medium	120
Reinstalling preinstalled applications and device drivers	121
Solving recovery problems	122
Recovery overview for the Windows 8.1 operating system	122
Refreshing your computer	122
Resetting your computer to the factory default settings	123
Using the advanced startup options	123
Recovering your operating system if Windows 8.1 fails to start	123
Creating and using recovery media	123
Chapter 9. Getting support	125
Before you contact Lenovo	125
Getting help and service	125
Using diagnostic programs	126
Lenovo Support Web site	126
Calling Lenovo	126
Purchasing additional services	127
Chapter 10. You and your computer	129
Accessibility and comfort	129
Ergonomic information	129
Comfort	130
Accessibility information	130
Traveling with your computer	134
Travel tips	134
Travel accessories	135
Appendix A. Regulatory information	137
Wireless related information	137
Location of the UltraConnect wireless antennas	138
Locating wireless regulatory notices	139
Certification related information	139
Export classification notice	139
Electronic emission notices	139
Federal Communications Commission Declaration of Conformity	139
Industry Canada Class B emission compliance statement	140
European Union - Compliance to the Electromagnetic Compatibility Directive	140
German Class B compliance statement	140
Korea Class B compliance statement	141
Japan VCCI Class B compliance statement	141
Japan compliance statement for products which connect to the power mains with rated current less than or equal to 20 A per phase	141
Lenovo product service information for Taiwan	141
Eurasian compliance mark	141
Brazil regulatory notice	141
Mexico regulatory notice	141
Appendix B. WEEE and recycling statements	143
Important WEEE information	143
Japan recycling statements	143
Recycling information for Brazil	144
Battery recycling information for the European Union	144
Battery recycling information for Taiwan	145
Battery recycling information for the United States and Canada	145
Recycling information for China	145
Appendix C. Restriction of Hazardous Substances Directive (RoHS)	147
European Union RoHS	147
China RoHS	148
Turkish RoHS	148
Ukraine RoHS	149
India RoHS	149
Appendix D. ENERGY STAR model information	151
Appendix E. Notices	153

Match case Limit results 1 per page

1. Turn off the computer.

2. Remove the external numeric keypad.

3. Turn on the computer and try using the keyboard again.

If the keyboard problem is resolved, carefully reconnect the external numeric keypad and the external

keyboard. Ensure that you have seated the connectors correctly.

If the problem persists, ensure that the correct device driver is installed by doing the following:

1. Open

ControlPanel

. Change the view of Control Panel from Category to Large icons or Small icons.

2. Click

Keyboard

3. Select the

Hardware

tab. In the

DeviceProperties

pane, ensure that you see this message:

Device

Status: This device is working properly.

If keys on the keyboard still do not work, have the computer serviced.

•

Problem

: All or some keys on the external numeric keypad do not work.

Solution

: Ensure that the external numeric keypad is correctly connected to the computer.

Problems with the display and multimedia devices

This topic includes the most common problems with displays and multimedia devices, including the

computer display, the external monitor, and audio devices.

Computer screen problems

•

Problem

: The screen is blank.

Solution

: Do the following:

– Press the display mode-switching key

to bring up the image.

– If you are using the ac power adapter, or using the battery and the battery gauge shows that the battery

is not depleted, press the brightness-up key

to make the screen brighter.

– If your computer is in sleep mode, press Fn to resume from the sleep mode.

– If the problem persists, follow the solution for the following problem.

•

Problem

: The screen is unreadable or distorted.

Solution

: Ensure that:

– The display device driver is installed correctly.

– The screen resolution and color quality are correctly set.

– The monitor type is correct.

To check these settings, do the following:

1. Connect the external monitor to your computer, and then connect the monitor to an electrical outlet.

2. Turn on the external monitor.

3. Right-click on the desktop, and click

Screen resolution

Note:

If your computer cannot detect the external monitor, click the

Detect

button.

4. Select the external monitor and set

Resolution

5. Click

Advanced Settings

6. Click the

Monitor

tab.Check the monitor information to ensure that the monitor type is correct.

If the monitor type is correct, click

to close the window; otherwise proceed with the following steps.

Chapter 7

Troubleshooting computer problems