Lenovo B490 Laptop Hardware Maintenance Manual - ThinkPad B490 - Page 3

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Contents About this manual iii Chapter 1. Safety information 1 General safety 1 Electrical safety 2 Safety inspection guide 3 Handling devices that are sensitive to electrostatic discharge 3 Grounding requirements 4 Safety notices (multilingual translations 4 Laser compliance statement (multilingual translations 19 Chapter 2. Important service information 27 Strategy for replacing FRUs 27 Strategy for replacing a hard disk drive . . . 28 Important notice for replacing a system board 28 Important information about replacing RoHS compliant FRUs 28 Chapter 3. General checkout . . . . . 29 What to do first 29 Power system checkout 30 Checking the ac power adapter 30 Checking operational charging 31 Checking the battery pack 31 Chapter 4. Related service information 33 Recovering the computer settings 33 Passwords 33 Power-on password 34 Supervisor password 34 Power management 34 Screen blank mode 34 Sleep mode 34 Hibernation mode 35 Chapter 5. Lenovo product information 37 Specifications 37 Status indicators 38 Fn key combinations 39 Chapter 6. FRU replacement notices 41 Screw notices 41 Chapter 7. Removing and replacing a FRU 43 General guidelines 43 1010 Battery pack 44 1020 Bottom slot cover 44 1030 Optical drive 45 1040 Memory modules 46 1050 Hard disk drive assembly 47 1060 PCI Express Mini Card for wireless LAN . . 49 1070 mSATA solid-state drive 50 1080 Backup battery 51 1090 Keyboard 51 1100 Keyboard bezel 54 1110 LED board 56 1120 Power board 57 1130 Microphone assembly 58 1140 Media card reader slot board 59 1150 System board assembly and USB board . . 60 1160 Thermal module 62 1170 Microprocessor 65 1180 LCD unit 66 1190 Speaker assembly 68 1200 DC-in connector and base cover . . . . . 69 2010 LCD front bezel 71 2020 Camera 72 2030 LCD panel, LCD cable, and hinges . . . . 73 2040 Antenna assembly and LCD rear cover . . . 75 Chapter 8. Locations 77 Front view 77 Right-side view 78 Bottom and left-side view 78 Chapter 9. Parts list 79 Overall 80 LCD FRUs 84 Keyboard 86 Miscellaneous parts 89 ac power adapters 89 Power cords 91 Appendix A. Notices 95 Electronic emissions notices 96 Trademarks 96 © Copyright Lenovo 2012, 2013 i

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Contents
About this manual
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iii
Chapter 1. Safety information
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1
General safety
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Electrical safety
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Safety inspection guide
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3
Handling devices that are sensitive to electrostatic
discharge
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Grounding requirements
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Safety notices (multilingual translations)
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Laser compliance statement (multilingual
translations)
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19
Chapter 2. Important service
information
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27
Strategy for replacing FRUs
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Strategy for replacing a hard disk drive
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Important notice for replacing a system
board
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Important information about replacing RoHS
compliant FRUs
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Chapter 3. General checkout
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What to do first
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Power system checkout
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Checking the ac power adapter
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Checking operational charging
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Checking the battery pack
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Chapter 4. Related service
information
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33
Recovering the computer settings
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Passwords
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Power-on password
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Supervisor password
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Power management
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Screen blank mode
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Sleep mode
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Hibernation mode
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Chapter 5. Lenovo product
information
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37
Specifications
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37
Status indicators
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Fn key combinations
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Chapter 6. FRU replacement
notices
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Screw notices
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Chapter 7. Removing and replacing a
FRU
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43
General guidelines
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1010 Battery pack
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1020 Bottom slot cover
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1030 Optical drive
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1040 Memory modules
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1050 Hard disk drive assembly
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1060 PCI Express Mini Card for wireless LAN
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1070 mSATA solid-state drive
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1080 Backup battery
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1090 Keyboard
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1100 Keyboard bezel
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1110 LED board
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1120 Power board
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1130 Microphone assembly
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1140 Media card reader slot board
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1150 System board assembly and USB board
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1160 Thermal module
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1170 Microprocessor
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1180 LCD unit
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1190 Speaker assembly
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1200 DC-in connector and base cover
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2010 LCD front bezel
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2020 Camera
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2030 LCD panel, LCD cable, and hinges
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2040 Antenna assembly and LCD rear cover .
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Chapter 8. Locations
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77
Front view
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Right-side view
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78
Bottom and left-side view
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78
Chapter 9. Parts list
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79
Overall
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LCD FRUs
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84
Keyboard
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86
Miscellaneous parts
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89
ac power adapters
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89
Power cords
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91
Appendix A. Notices
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95
Electronic emissions notices
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96
Trademarks
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96
© Copyright Lenovo 2012, 2013
i