Lenovo A540 All In One Lenovo A540/A740 Hardware Maintenance Manual - Page 5

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Contents Chapter 1. About this manual 1 Important Safety Information 1 Chapter 2. Safety information 3 General safety 3 Electrical safety 3 Safety inspection guide 5 Handling electrostatic discharge-sensitive devices 5 Grounding requirements 6 Safety notices 6 Chapter 3. General information . . . . . 9 Specifications 9 Chapter 4. General Checkout . . . . . 11 Chapter 5. Using the Setup Utility. . . 13 Starting the Lenovo BIOS Setup Utility program . 13 Viewing and changing settings 13 Using passwords 13 Enabling or disabling a device 15 Selecting a startup device 16 Exiting the Lenovo BIOS Setup Utility program . . 17 Chapter 6. Symptom-to-FRU Index . . 19 Hard disk drive boot error 19 Power Supply Problems 19 POST error codes 20 Undetermined problems 20 Chapter 7. Replacing hardware . . . . 21 General information 21 Replacing the keyboard and mouse 22 Replacing the power cord or power adapter . . . 22 Removing the base cover 23 Replacing the hard disk drive 24 Replacing a memory module 26 Replacing the system fan 27 Replacing the heat-sink 28 Replacing the speaker system 29 Replacing the motherboard 30 Removing the hinge from the chassis 31 Removing the rear cover 32 Replacing the Transform board 35 Replacing the Wi-Fi card 36 Replacing the power switch board 37 Replacing the NFC module 38 Replacing the camera 39 Replacing the LED panel 40 A540 FRU lists 42 A740 FRU lists 46 Chapter 8. General information . . . . 53 Additional Service Information 53 © Copyright Lenovo 2014 iii

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Contents
Chapter1.Aboutthismanual
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Important Safety Information
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Chapter2.Safetyinformation
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General safety
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Electrical safety
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Safety inspection guide
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Handling electrostatic discharge-sensitive
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Grounding requirements
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Safety notices
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Chapter3.Generalinformation
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Specifications
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Chapter4.GeneralCheckout
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Chapter5.UsingtheSetupUtility. . . 13
Starting the Lenovo BIOS Setup Utility program
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Viewing and changing settings
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Using passwords
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Enabling or disabling a device
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Selecting a startup device
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Exiting the Lenovo BIOS Setup Utility program .
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Chapter6.Symptom-to-FRUIndex. . 19
Hard disk drive boot error
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Power Supply Problems
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POST error codes
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Undetermined problems
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Chapter7.Replacinghardware
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General information
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Replacing the keyboard and mouse
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Replacing the power cord or power adapter .
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Removing the base cover
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Replacing the hard disk drive
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Replacing a memory module
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Replacing the system fan
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Replacing the heat-sink
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Replacing the speaker system
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Replacing the motherboard
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Removing the hinge from the chassis
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Removing the rear cover
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Replacing the Transform board
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Replacing the Wi-Fi card
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Replacing the power switch board
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Replacing the NFC module
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Replacing the camera
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Replacing the LED panel
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A540 FRU lists
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A740 FRU lists
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Chapter8.Generalinformation
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Additional Service Information
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© Copyright Lenovo 2014
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