Lenovo HORIZON 2s, Maintenance Manual, Page: 5 / 57

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
Changing booting mode . . . . . . . . . . . 17
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. Locating connectors,
controls and components . . . . . .
21
Chapter 8. Replacing hardware . . . . 25
General information . . . . . . . . . . . . . 25
Replacing the keyboard and mouse . . . . . . 26
Replacing the power adapter . . . . . . . . . 26
Removing the rear cover . . . . . . . . . . . 28
Replacing the battery . . . . . . . . . . . . 30
Replacing the hard disk drive . . . . . . . . . 31
Replacing the Wi-Fi card. . . . . . . . . . . 33
Replacing the heat-sink . . . . . . . . . . . 33
Replacing a system fan . . . . . . . . . . . 35
Replacing the I/O board . . . . . . . . . . . 36
Replacing the speaker system . . . . . . . . 37
Replacing the power connector . . . . . . . . 37
Replacing the dongle connector . . . . . . . . 38
Replacing the power docking board . . . . . . 39
Replacing the button board. . . . . . . . . . 40
Replacing the motherboard. . . . . . . . . . 41
Replacing the camera . . . . . . . . . . . . 42
Replacing the LED panel module . . . . . . . 43
Chapter 9. FRU lists . . . . . . . . . . 45
Chapter 10. Additional Service
Information . . . . . . . . . . . . . .
51
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