Lenovo ThinkPad Yoga 12 (English) Hardware Maintenance Manual - ThinkPad Yoga - Page 3

Contents About this manual iii Chapter 1. Safety information 1 General safety 1 Electrical safety 1 Safety inspection guide 2 Handling devices that are sensitive to electrostatic discharge 3 Grounding requirements 4 Safety notices (multilingual translations 4 Chapter 2. Important service information 19 Strategy for replacing FRUs 19 Strategy for replacing a hard disk drive or a solid-state drive 19 Important notice for replacing a system board 20 How to use error message 20 Strategy for replacing FRUs for CTO, special bid model, and standard models 20 Product definition 20 FRU identification 21 Chapter 3. General checkout . . . . . 23 What to do first 23 Checkout guide 24 Lenovo Solution Center 24 Quick test programs 24 UEFI diagnostic program 25 Bootable diagnostic programs 26 Power system checkout 27 Checking the ac power adapter 27 Checking the built-in battery and operational charging 27 Checking the coin-cell battery 28 Chapter 4. Related service information 29 Restoring the factory contents by using the product Recovery Disc Set 29 Using the Windows recovery programs on the Windows 8.1 operating system 30 Refreshing your computer 30 Resetting your computer to the factory default settings 30 Using the advanced startup options . . . . 31 Recovering your operating system if Windows 8.1 fails to start 31 © Copyright Lenovo 2015 Creating and using recovery media . . . . . 31 Passwords 32 Power-on password 32 Hard disk password 33 Supervisor password 33 How to remove the power-on password . . . 33 How to remove the hard disk password . . . 34 Power management 34 Screen blank mode (for the Windows 7 operating system only 34 Sleep mode 34 Hibernation mode 35 Symptom-to-FRU index 35 Numeric error codes 36 Error messages 37 Beep symptoms 37 No-beep symptoms 38 LCD-related symptoms 38 Intermittent problems 39 Undetermined problems 39 Chapter 5. Status indicators . . . . . 41 Chapter 6. Function keys 43 Chapter 7. Locations 45 Locating computer controls, connectors, and indicators 45 Front view 45 Rear view 46 Bottom view 47 Locating FRUs and CRUs 47 Major FRUs 48 LCD FRUs 50 Miscellaneous parts and other FRUs . . . . 51 Looking up FRU information 52 Chapter 8. FRU replacement notices 53 Screw notices 53 Retaining serial numbers 54 Restoring the serial number of the system unit 54 Retaining the UUID 55 Chapter 9. Removing or replacing a FRU 57 General guidelines 57 i