Lenovo M50-70 Laptop (English) Hardware Maintenance Manual - Page 3

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 What to do first 20 Power system checkout 21 Checking the AC adapter 21 Checking operational charging 21 Checking the battery pack 22 Related service information 23 Restoring the factory contents by using OneKey Recovery 23 Restore of factory default 23 Passwords 24 Power-on password 24 Hard-disk password 24 Administrator password 24 Power management 25 Screen blank state 25 Putting the computer to sleep or shutting it down 25 Putting your computer to sleep 25 Shutting down the computer 26 Lenovo M50-70/M50-80 27 Specifications 27 Status indicators 29 Fn key combinations 30 FRU replacement notices 31 Screw notices 31 Removing and replacing an FRU 32 1010 Optical drive 33 1020 Keyboard 35 1030 Base cover 37 1040 Battery pack 40 1050 Hard disk drive 42 1060 PCI Express Mini Card for wireless LAN 44 1070 DIMM 46 1080 ODD board 48 1090 Docking board 49 1100 Speakers 51 1110 Thermal module 52 1120 USB board and finger print board 53 1130 System board and touchpad module........56 1140 Upper case and power board 59 1150 LCD unit 62 1160 Antenna assembly 66 1170 LCD cable and integrated camera............67 Locations 69 Front view and right-side view 69 Bottom and Left-side view 70 Parts list 71 Overall 72 LCD FRUs 75 Keyboard 77 Miscellaneous parts 79 AC adapters 80 Screws 80 Power cords 81 Notices 84 Trademarks 85 iii