Plastic parts

36

Cables and connectors

37

Drive handling

37

Grounding guidelines

38

Electrostatic discharge damage

38

Packaging and transporting guidelines

39

Workstation guidelines

39

Equipment guidelines

40

Component replacement procedures

41

Service tag

41

Battery

42

Using the optional security screw

43

Bottom door

44

SIM

45

Optical drive

46

Hard drive

48

Memory modules

50

WWAN module

52

WLAN/Bluetooth combo card

54

Keyboard

56

Heat shield

59

Fan

61

Heat sink

63

Processor

66

Top cover

67

Fingerprint reader board

75

Speaker assembly

76

Function board/Power button board assembly

79

Audio board

81

USB connector assembly

82

Battery cable

84

System board

85

RTC battery

88

Optical drive extension board (4540s models only)

90

Hard drive extension board (4540s models only)

92

Power cable

94

Latch assembly

95

Display assembly

97

5 Computer Setup (BIOS) and Advanced System Diagnostics

105

Using Computer Setup

105

vi

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HP 14 C9K59UT#ABA, D8C11UT 14 D8C11UT#ABA, 4540s C6Z35UT#ABA manual 105