iii
Contents
About this manual ....................................... iv
Safety information ........................................ 1
General safety ................................................ 2
Electrical safety .............................................. 3
Safety inspection guide .................................. 5
Handling devices that are sensitive to
electrostatic discharge .................................... 6
Grounding requirements ................................. 6
Safety notices: multilingual translations.......... 7
Laser compliance statement......................... 14
Important service information ................... 16
Strategy for replacing FRUs ......................... 16
Strategy for replacing a hard disk drive ............17
Important notice for replacing a system
board ................................................................17
Important information about replacing
RoHS compliant FRUs ................................. 18
General checkout ...................................... 19
............................................. 20
Power system checkout................................ 21
Checking the AC adapter .................................21
Checking operational charging .........................22
Checking the battery pack ................................22
Related service information ...................... 23
Restoring the factory contents by using
recovery system ........................................... 23
Restore of factory default .................................23
Passwords .................................................... 24
Power-on password ..........................................24
Hard-disk password ..........................................24
Supervisor password ........................................24
Power management ..................................... 25
Putting the computer to sleep or
shutting it down .................................................25
Putting your computer to sleep .........................25
Shutting down the computer .............................25
Lenovo YOGA 720-12IKB ........................... 26
............................................... 26
Status indicators ........................................... 27
Keyboard function keys ................................ 28
FRU replacement notices ............................. 29
Screw notices ..................................................29
Removing and replacing an FRU ................. 30
1010 Base cover ...............................................31
1020 Battery pack .............................................33
1030 Solid state disk ........................................34
1040 PCI Express Mini Card for
wireless LAN .....................................................35
1050 Speakers .................................................37
1060 IO board ...................................................39
1070 Fan and heat sink assembly ....................40
1080 System board ..........................................42
1090 Fingerprint module and DC-in cable ........45
1100 LCD unit ...................................................46
1110 LCD panel ................................................47
1120 EDP cable ................................................50
1130 Microphone board and camera board ......52
1140 LCD hinges ..............................................54
Locations ...................................................... 56
Front and right-side view ..................................56
Bottom and left-side view ................................57
Parts list ........................................................ 58
Overall ..............................................................59
LCD FRUs ........................................................64
Miscellaneous parts ..........................................65
AC adapters ......................................................66
Screws ..............................................................66
Power cords ......................................................67
Notices......................................................... 71
Trademarks .................................................. 72