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
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
Using recovery discs.........................................23
Passwords .................................................... 24
Power-on password ..........................................24
Supervisor password .......................................24
Power management ..................................... 25
Screen blank mode ...........................................25
Sleep (standby) mode ......................................25
Hibernation mode .............................................26
Lenovo B550 ............................................... 27
Specifications ............................................... 27
Status indicators ........................................... 29
Fn key combinations..................................... 31
FRU replacement notices ............................. 32
Screw notices ..................................................32
Removing and replacing an FRU ................. 33
1010 Battery pack .............................................34
1020 Hard disk drive (HDD) slot cover
and HDD ...........................................................35
1030 Memory/Wireless module/CPU
(central processing unit) compartment cover ...37
1040 Optical drive .............................................38
1050 DIMM .......................................................39
1060 Fan assembly and Heat Sink assembly ... 40
1070 CPU .........................................................43
1080 PCI Express Mini Card for wireless
LAN/WAN .........................................................44
1090 Keyboard cover and power board ...........46
1100 Keyboard ..................................................49
1110 LCD unit ...................................................51
1120 Keyboard bezel ........................................55
1130 System board ........................................... 59
1140 Bluetooth daughter card, speakers
and base cover .................................................62
1150 LCD front bezel ........................................66
1160 LCD panel and hinges .............................67
1170 Integrated camera ....................................69
1180 Antenna assembly and LCD cover ..........70
Locations ...................................................... 71
Front view .........................................................71
Right-side view .................................................72
Bottom and Left-side view ...............................72
Parts list ........................................................ 73
Overall ..............................................................74
LCD FRUs ........................................................78
Keyboard ..........................................................80
Miscellaneous parts ..........................................82
AC adapters ......................................................83
Power cords ......................................................84
Notices......................................................... 86
Trademarks .................................................. 87
