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HP Dv4 1540us Service Guide - Page 119

Remove the power button board, Reverse this procedure to install the power button board., Component

UPC - 884962549049

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3. Remove the power button board (3). Reverse this procedure to install the power button board. Component replacement procedures 111

Section	Page
Product description	9
External component identification	16
Top components	16
TouchPad	16
Lights	17
Buttons, speakers, and fingerprint reader	18
Keys	21
Display	22
Front components	23
Rear component	24
Right-side components	24
Left-side components	25
Bottom components	26
Wireless antennae	27
Illustrated parts catalog	28
Serial number location	28
Computer major components	29
Display assembly components	33
Plastics Kit	36
Mass storage devices	37
Miscellaneous parts	40
Sequential part number listing	44
Removal and replacement procedures	55
Preliminary replacement requirements	55
Tools required	55
Service considerations	55
Plastic parts	55
Cables and connectors	56
Drive handling	56
Grounding guidelines	57
Electrostatic discharge damage	57
Packaging and transporting guidelines	58
Workstation guidelines	58
Equipment guidelines	59
Unknown user password	60
Component replacement procedures	61
Serial number	61
Computer feet	62
Battery	63
SIM	64
Optical drive	65
Hard drive	67
WLAN module	70
WWAN module	73
Memory module	75
RTC battery	77
Camera/microphone module for standard display assembly	78
Keyboard	80
Keyboard cover	82
Bluetooth module	84
Speaker assembly	85
SIM connector board	87
Display assembly	88
Standard display assembly	92
Flush Glass display assembly	95
Top cover	100
TouchPad	103
Fingerprint reader board	105
Modem module	107
Audio board	109
USB board	111
TV tuner antenna	113
System board	115
Power button board	118
Modem module cable	120
Fan and heat sink	122
Heat sink assembly for discrete graphics system	123
Heat sink assembly for UMA graphics system	124
Processor	126
Setup Utility	129
Starting the Setup Utility	129
Changing the language of the Setup Utility	129
Navigating and selecting in the Setup Utility	130
Displaying system information	130
Restoring default settings in the Setup Utility	131
Exiting the Setup Utility	131
Setup Utility menus	132
Specifications	134
Computer specifications	134
14.1-inch, WXGA, BrightView display specifications	135
Hard drive specifications	136
Blu-ray Disc ROM Drive with SuperMulti DVD±R/RW Double-Layer (DL) support specifications	137
DVD±RW and CD-RW Super Multi Double-Layer Combo Drive specifications	138
System DMA specifications	139
System interrupt specifications—Intel processors	140
System interrupt specifications—AMD processors	141
System I/O address specifications—Intel processors	142
System I/O address specifications—AMD processors	144
System memory map specifications—Intel processors	146
System memory map specifications—AMD processors	147
Screw listing	149
Phillips PM1.5×9.0 slotted screw	150
Phillips PM2.0×3.0 broadhead screw	151
Phillips PM2.0×4.0 screw	152
Phillips PM2.0×10.0 captive screw	156
Phillips PM2.5×3.0 screw	157
Phillips PM2.5×4.0 screw	158
Phillips PM2.5×6.0 screw	163
Phillips PM2.5×6.0 captive screw	165
Phillips PM2.5×7.0 screw	166
Phillips PM2.5×9.0 screw	167
Phillips PM2.5×17.0 screw	169
Phillips PM3.0×4.0 screw	170
Backup and recovery	171
Recovering system information	171
Backing up your information	171
When to back up	171
Backup suggestions	172
Using system restore points	172
When to create restore points	172
Create a system restore point	172
Restore to a previous date and time	173
Creating recovery discs	173
Performing a recovery	174
Recovering from the recovery discs	174
Recovering from the dedicated recovery partition (select models only)	174
Connector pin assignments	176
Audio-in (microphone)	176
Audio-out (headphone)	177
External monitor	178
RJ-11 (modem)	179
RJ-45 (network)	180
HDMI	181
Universal Serial Bus	182
Power cord set requirements	183
Requirements for all countries or regions	183
Requirements for specific countries or regions	184
Recycling	185
Battery	185
Display	185

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Remove the power button board

(3)

Reverse this procedure to install the power button board.

Component replacement procedures

111