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HP 520 HP 520 Notebook PC - Maintenance and Service Guide - Page 57

The wireless antenna transceivers are attached to the display enclosure by a thin layer

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18. Remove the display hinges (2). The hinges are available in the Display Bracket/Hinge Kit, spare part number 448335-001. 19. If it is necessary to replace the wireless antenna transceivers (1) and cables (2), remove the transceivers and cables from the display enclosure. The wireless antenna transceivers and cables are available in the Wireless Antenna Kit, spare part number 438516-001. NOTE: The wireless antenna transceivers are attached to the display enclosure by a thin layer of adhesive. It may be necessary to use a flat-bladed tool to pry the transceivers away from the display enclosure. Reverse this procedure to reassemble and install the display assembly. Component replacement procedures 49

Section	Page
Product description	9
External component identification	13
Front components	13
Top components	14
Buttons and lights	14
Keys	15
Pointing devices	16
Right-side components	17
Left-side components	17
Bottom components	18
Illustrated parts catalog	19
Serial number location	19
Computer major components	20
Display assembly components	24
Plastics/Hardware Kit	25
Mass storage devices	26
Miscellaneous parts	27
Sequential part number listing	28
Removal and replacement procedures	33
Preliminary replacement requirements	33
Tools required	33
Service considerations	33
Plastic parts	33
Cables and connectors	33
Drive handling	34
Grounding guidelines	34
Electrostatic discharge damage	34
Packaging and transporting guidelines	35
Workstation guidelines	35
Equipment guidelines	36
Unknown user password	37
Component replacement procedures	38
Serial number	38
Battery	39
Hard drive	40
Computer feet	42
Memory module	43
WLAN module	45
Optical drive	47
Switch cover	49
Keyboard	51
Display assembly	53
Base enclosure	58
RTC battery	60
Fan assembly	61
Heat sink	63
Processor	65
Speaker	66
System board	68
PC Card assembly	70
TouchPad cable	72
Computer Setup	75
Starting Computer Setup	75
Using Computer Setup	76
Navigating and selecting in Computer Setup	76
Restoring factory settings in Computer Setup	76
Computer Setup menus	77
File menu	77
Security menu	78
Diagnostics menu	78
System Configuration menu	79
Specifications	81
Computer specifications	81
14.1-inch, WXGA display specifications	82
Hard drive specifications	83
Primary 4-cell, Li-ion battery specifications	84
DVD±RW and CD-RW Super-Multi Double-Layer Combo Drive specifications	85
DVD/CD-RW Combo Drive specifications	86
System DMA specifications	87
System interrupt specifications	88
System I/O address specifications	89
System memory map specifications	91
Screw listing	93
Phillips PM2.5×8.0 captive screw	94
Phillips PM3.0×3.0 screw	95
Phillips PM2.0×4.0 screw	96
Phillips PM2.0×9.0 screw	97
Phillips PM2.0×3.0 screw	100
Phillips PM2.0×7.0 screw	102
Phillips PM2.5×6.0 screw	103
Backup and recovery	105
Creating recovery discs	105
Backing up your information	106
When to back up	106
Backup suggestions	106
Backing up specific files or folders	107
Backing up the entire hard drive	107
Creating recovery points	108
Scheduling backups	108
Performing a recovery	109
Performing a recovery from the recovery discs	109
Performing a recovery from the hard drive	109
Initiating a recovery in Windows	110
Initiating a recovery from the hard drive recovery partition	110
Connector pin assignments	111
Audio-out (headphone)	111
Audio-in (microphone)	111
External monitor	112
RJ-11 (modem)	113
RJ-45 (network)	113
Universal Serial Bus	114
Power cord set requirements	115
Requirements for all countries	115
Requirements for specific countries	116
Recycling	117
Battery	117
Display	117