Table Of Contents - Lenovo N23 Hardware Maintenance Manual

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
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
Supervisor 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 N23 ................................................. 27
Specifications ............................................... 27
Status indicators ........................................... 29
Fn key combinations..................................... 30
FRU replacement notices ............................. 31
Screw notices ..................................................31
Removing and replacing an FRU ................. 32
1010 Base cover ...............................................33
1020 Battery pack .............................................35
1030 PCI Express Mini Card for wireless
LAN ..................................................................36
1040 LCD unit ...................................................38
1050 System board ..........................................40
1060 Speakers .................................................42
1070 Touch pad module and IO board .............43
1080 LCD module .............................................45
1090 LCD cable, LCD bracket and hinges .......47
1100 camera .....................................................49
1110 Antenna assembly and LCD cover ...........50
Locations ...................................................... 51
Front view and right-side view ..........................51
Bottom and Left-side view ...............................52
Parts list ........................................................ 53
Overall ..............................................................54
LCD FRUs ........................................................57
Miscellaneous parts ..........................................59
Screw ................................................................59
AC adapters ......................................................60
Power cords ......................................................61
Notices......................................................... 64
Trademarks .................................................. 65
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