Lenovo B40-70 Hardware Maintenance Manual - Lenovo B40-xx Notebook - 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 B40-30/B40-45/B40-70 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, power board and led board 45 1100 USB board 47 1110 System board 48 1120 Fan and heat sink assembly 50 1130 Speakers 51 1140 LCD unit and base cover 52 1150 LCD front bezel 56 1160 LCD panel 57 1170 LCD hinges 59 1180 Antenna, LCD cable, and integrated camera 60 Locations 62 Front view 62 Right‐side view 63 Bottom and left‐side view 64 Parts list 65 Overall 66 LCD FRUs 70 Keyboard 72 Miscellaneous parts 75 AC adapters 76 Screws 76 Power cords 77 Notices 80 Trademarks 81 iii