Lenovo B50-45 Hardware Maintenance Manual - Lenovo B50-xx, B50-30 Touch Notebo - 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 electro‐ static 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 Recov‐ ery Disc Set 23 Passwords 24 Power‐on password 24 Hard‐disk password 24 Supervisor password 24 Power management 25 Screen blank state 25 Putting the computer to sleep or shutting it down 25 Lenovo B50-30/B50-30 Touch/B50-45/B50-70 27 Specifications 27 Status indicators 29 Fn key combinations 30 Hotkeys 30 FRU replacement notices 31 Screw notices 31 Removing and replacing an FRU 32 1010 Battery pack 33 1020 Optical drive 34 1030 Bottom slot cover 36 1040 Hard disk drive 37 1050 DIMM 39 1060 PCI Express Mini Card for wireless LAN/WAN 40 1070 Keyboard 41 1080 Keyboard bezel 43 1090 Finger print and power board .......... 45 1100 USB board and ODD board 47 1110 Led board 48 1120 Docking board (on select models).... 49 1130 System board 50 1140 Fan and heat sink assembly 53 1150 Speakers and battery board 54 1160 LCD unit and base cover 55 1170 LCD front bezel 59 1180 LCD panel 60 1190 LCD hinges 62 1200 Antenna, LCD cable, and integrated camera 63 Locations 65 Front view 65 Right‐side view 66 Bottom and left‐side view 67 Parts list 68 Overall 69 LCD FRUs 73 Keyboard 75 Miscellaneous parts 78 AC adapters 79 Screws 79 Power cords 80 Notices 83 Trademarks 84 iii