HP ProBook 4720s HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC
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- HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 1
HP ProBook 4520s Notebook PC HP ProBook 4720s Notebook PC Maintenance and Service Guide - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 2
to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 3
Safety warning notice WARNING! To reduce the possibility of heat-related injuries or of overheating the computer, do not place the computer directly on your lap or obstruct the computer air vents. Use the computer only on a hard, flat surface. Do not allow another hard surface, such as an adjoining - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 4
iv Safety warning notice - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 5
Left-side components ...16 Bottom components ...17 Display ...17 Wireless antennas ...19 Additional hardware components 20 3 Illustrated parts catalog 21 Service tag ...21 Computer major components 22 Display assembly components 28 Plastics Kit ...29 Cable Kits ...30 Mass storage devices ...32 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 6
Packaging and transporting guidelines 46 Workstation guidelines 46 Equipment guidelines 47 Component replacement procedures 48 Service tag ...48 Computer feet ...49 Battery ...50 Switch cover and keyboard 51 Memory module ...55 Optical drive ...56 Power button board 58 Speakers ...60 Thermal - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 7
...121 17.3-in display specifications 122 15.6-in display specifications 123 Hard drive specifications ...124 DVD-ROM Drive specifications 125 DVD±RW Double-Layer Combo Drive specifications 126 Blu-ray Disc ROM Drive with SuperMulti DVD±R/RW Double-Layer specifications 127 7 Backup and recovery - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 8
10 Recycling ...146 Battery ...146 Display ...146 Index ...152 viii - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 9
Category Product Name Processors Chipsets Graphics Panels Description HP ProBook 4520s Notebook PC HP ProBook 4720s Notebook PC Intel® Core™ processors ● i7-620M, display assemblies support privacy filter HP ProBook 4520s UMA • • HP ProBook 4520s discrete • • • • • • HP ProBook 4720s - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 10
module slots Supports dual-channel memory • Supports up to 4 GB of system RAM • PC3-10600, 1333-MHz, DDR3 • Supports the following × 2, dual-channel) ● 1024-MB total system memory (1024MB × 1) HP ProBook 4520s discrete • HP ProBook 4720s discrete • 2 Chapter 1 Product description - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 11
Category Hard drives Optical drives Diskette drive Audio/visual Modem Ethernet Wireless Description HP ProBook 4520s UMA Supports 9.5-mm, 6.35-cm (2.50-in) hard • drives Customer-accessible • Serial ATA • Supports the following drives: • ● 500-GB, 7200-rpm ● 320-GB, 7200-rpm ● 250-GB, - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 12
HP ProBook 4520s UMA HP ProBook 4520s discrete HP ProBook 4720s discrete 2 WLAN antennas built into display assembly • • • Supports option for no-WLAN • • • Support 33-mm • • • Media Card Reader supporting Memory Stick • • • (MS), Memory Stick Pro (MSP), Secure Digital (SD) Memory - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 13
Category Description HP ProBook 4520s UMA VGA (Dsub 15-pin) supporting 1600 × 1200 • external resolution at 75-GHz (hot plug/ unplug with auto-detect) Multi-pin AC power • HDMI • Keyboard/ pointing devices 15.6-in keyboard with integrated number pad • and Clickpad 17.3-in keyboard with - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 14
with XP Pro • images with Office 2007 Personal with PowerPoint (Japan only) Preinstalled: Windows 7 Professional 32 (Japan only) • Windows 7 Home Premium 32 (Japan only) • Windows Vista Home Basic 32 with MS • Basics (Japan only) HP ProBook 4520s discrete • • • • • • HP ProBook 4720s - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 15
XP Pro • Windows Vista Office Ready DVD • Certified: Microsoft® WHQL • Web Support: • All Windows Vista 64 versions • Windows 7 Professional 64 versions • End-user replaceable parts: AC adapter • Battery (system) • HP ProBook 4520s discrete • • • • • • • HP ProBook 4720s - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 16
Category Description Hard drive Memory module Optical drive WLAN module WWAN module HP ProBook 4520s UMA HP ProBook 4520s discrete • • • • • HP ProBook 4720s discrete • • • • 8 Chapter 1 Product description - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 17
on the operating system installed on your comouter, some components may function differently than described. Some functionality may not be supported by the operating system installed on your computer. Top Components TouchPad Component (1) TouchPad off indicator light (2) TouchPad zone* (3) Left - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 18
Component (4) Right TouchPad button *This table describes factory settings. Description Functions like the right button on an external mouse. 10 Chapter 2 External component identification - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 19
: Your computer may look slightly different from the illustration in this section. Component (1) TouchPad off indicator (2) Caps lock light (3) HP QuickLook light (4) HP QuickWeb light (5) Power light (5) Wireless light Description ● Amber: The TouchPad is off. ● Off: The TouchPad is on. On: Caps - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 20
Buttons, switches, and speakers (select models only) NOTE: Your computer may look slightly different from the illustration in this section. Component (1) Speakers (2) (2) Internal display switch (3) Power button (4) Fingerprint reader (select models only) Description Produce sound. Turns off the - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 21
Keys Component (1) esc key (2) fn key (3) Windows logo key (4) Windows applications key (5) Integrated numeric keypad keys (6) Function keys Description Displays system information when pressed in combination with the fn key. Executes frequently used system functions when pressed in combination - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 22
is being accessed. ● Amber: HP 3D DriveGuard has temporarily parked the hard drive. Supports the following optional digital card formats: ● Memory Stick ● Memory Stick Duo (adapter required) ● Memory Stick Pro (adapter required) - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 23
Component (1) USB ports (2) (2) RJ-11 (modem) jack (select models only) (3) Optical drive (select models only) (4) Optical drive light (select models only) (5) AC adapter light (6) Power connector Description Connect optional USB devices. Connects a modem cable. Reads optical discs and, on select - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 24
an optional HDMI device. Connects an optional USB device or high-performance eSATA components such as an eSATA external hard drive. Connects optional USB device. Supports optional ExpressCards. 16 Chapter 2 External component identification - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 25
Bottom components Component (1) Battery release latches (2) (2) Battery bay (3) SIM slot (select models only) Description Release the battery from the battery bay. Holds the battery. Contains a wireless subscriber identity module (SIM). The SIM slot is located inside the battery bay. Display NOTE - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 26
Component (1) Internal display switch (2) Internal microphone (3) Webcam light (select models only) (4) Webcam (select models only) Description Turns off the display if the display is closed while the power is on. Records sound. On: The webcam is in use. Records audio and video and captures still - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 27
notices, refer to the section of Regulatory, Safety and Environmental Notices that apply to your country or region. These notices are located in Help and Support. Wireless antennas 19 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 28
Additional hardware components Component Description (1) Power cord* Connects an AC adapter to an AC outlet. (2) Battery* Powers the computer when the computer is not plugged into external power. (3) AC adapter Converts AC power to DC power. *Batteries and power cords vary in appearance by - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 29
This number provides specific information about the product's hardware components. The part number helps a service technician to determine what components and parts are needed. (4) Model description: This is the alphanumeric identifier used to locate documents, drivers, and support for your computer - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 30
Computer major components Item Description (1) Display assembly (includes microphone, 2 WLAN antenna transceivers and cables and, on select computer models, 2 WWAN antenna transceivers and cables) For use only with computers with 17.3-in displays 22 Chapter 3 Illustrated parts catalog - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 31
with 15.6-in displays and red trim ● For use in computers with 15.6-in displays 598675-001 604853-001 598674-001 (3) Keyboard NOTE: For a detailed list of available keyboards, see Sequential part number listing on page 35. For use in computers with 17.3-in displays 598692-xxx For use in - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 32
001 For use in computers with 15.6-in displays 598682-001 (10) Audio board 598684-001 (11) Bluetooth module 537921-001 HP Integrated module with Bluetooth 2.1 wireless technology For use in Andorra, Argentina, Australia, Austria, Bangladesh, Belarus, Belgium, Bermuda, Brazil, Brunei, Bulgaria - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 33
Item Description System board with UMA graphics subsystem memory for use only in the People's Republic of 605168-001 China and Russia System board with UMA graphics subsystem memory and WWAN for use only in the People's Republic of China and Russia 605170-001 (14) Power connector (part of Base - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 34
Item Description ● For use in Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, 504593-004 Argentina, Armenia, Aruba, Australia, Austria, Azerbaijan, the Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bermuda, Bhutan, Bolivia, Bosnia and Herzegovina, - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 35
Item Description i5-540M, 2.53-GHz, 3-MB cache i7-620M, 2.26-GHz, 4-MB cache (19) RTC battery (20) HP un2420 Broadband Module (21) Optical drive extender for use only in computers with 17.3-in displays (22) Modem module NOTE: The modem module spare part - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 36
Display assembly components Item (1) (2) (3) Description Display bezel For use in computers with 17.3-in displays without webcam For use in computers with 15.6-in displays without webcam For use in computers with 17.3-in displays with webcam For use in computers with 15.6-in displays with webcam - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 37
Item (4) (5) (6) (7) (8) Description Display Hinge Kit For use in computers with 17.3-in displays For use in computers with 15.6-in displays Microphone cable LCD Cable Kit with webcam cable For use in computers with 17.3-in displays For use in computers with 15.6-in displays WLAN and WWAN antenna - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 38
Cable Kits Item Description Base Cable Kit for use in computers with 17.3-in displays, includes DC-in cable (1), USB cable (2), Bluetooth cable (3), and RJ-11 cable (4). for use in computers with 15.6-in displays, includes DC-in cable (1), USB cable (2), Bluetooth cable (3), and RJ-11 cable (4). - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 39
Item Description Misc LCD Cable Kit for use in computers with 15.6-in displays, includes microphone cable (1), WWAN transceiver with cable (2), and WLAN transceiver with cable (3) for use in computers with 17.3-in displays, includes items (1), (2), and (3) (1) Microphone cable, lengths differ for 17 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 40
Item Description for use in computers with 17.3-in displays for use in computers with 15.6-in displays LCD Cable without webcam cable for use in computers with 17.3-in displays for use in computers with 15.6-in displays Mass storage devices Spare part number 602999-001 600925-001 606973-001 606972- - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 41
Miscellaneous parts Description AC adapters 65-W AC adapter for use in computers with UMA graphics 90-W Slimline PFC AC adapter for use in computers with discrete graphics Power cords For use in Argentina For use in Australia and New Zealand For use in Brazil For use in Denmark For use in Europe, - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 42
Description Spare part number Screw Kit, includes: ● (5) Phillips 2.0×2.0 screws ● (5) Phillips 2.0×2.5 broadhead screws ● (5) Phillips 2.0×2.5 screws ● (5) Phillips 2×7.0 screws ● (5) Phillips 2.5×3.0 screws ● (5) Phillips 2.5×5.0 screws ● (5) Torx 2.5×5.0 screws ● (5) Torx 2.5×6.0 screws ● (5) - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 43
Sequential part number listing Spare part number Description 449137-001 RTC battery 463955-001 90-W Slimline PFC AC adapter for use in computers with discrete graphics 463958-001 65-W AC adapter for use in computers with UMA graphics 490371-001 Power cord for use in the United States 490371- - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 44
in all countries and regions except Australia and New Zealand 510100-011 Modem module for use in Australia and New Zealand 531993-001 HP un2420 Broadband Module 537921-001 Bluetooth module with Bluetooth 2.1 wireless technology 572509-001 Intel Centrino Advanced-N6200 802.11a/b/g/n 2x2 WLAN for - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 45
Spare part number Description 572520-001 Intel Wi-Fi Link 1000, 802.11b/g/n WLAN module for use in Andorra, Antigua and Barbuda, Argentina, Aruba, Australia, Austria, Azerbaijan, the Bahamas, Barbados, Belgium, Bolivia, Bosnia and Herzegovina, Brazil, Brunei, Bulgaria, Canada, Cayman Islands, - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 46
for use in Saudi Arabia on computers with 15.6-in displays 598691-201 Keyboard for use in Brazil on computers with 15.6-in displays 598691-211 Keyboard for use in Hungary on computers with 15.6-in displays 598691-221 Keyboard for use in the Czech Republic on computers with 15.6-in displays 38 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 47
for use in Europe on computers with 15.6-in displays 598691-A81 Keyboard for use in the Czech Republic on computers with 15.6-in displays 598691-AB1 Keyboard for use in Taiwan on computers with 15.6-in displays 598691-AD1 Keyboard for use in South Korea on computers with 15.6-in displays 598691 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 48
for use in Europe on computers with 17.3-in displays 598692-A81 Keyboard for use in the Czech Republic on computers with 17.3-in displays 598692-AB1 Keyboard for use in Taiwan on computers with 17.3-in displays 598692-AD1 Keyboard for use in South Korea on computers with 17.3-in displays 598692 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 49
Spare part number Description 598867-001 System board with UMA graphics subsystem memory 598868-001 System board with discrete graphics subsystem memory 598869-001 System board with UMA graphics subsystem memory and WWAN 599804-001 Palm rest for use in computers with 15.6-in displays with - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 50
Spare part number Description 605168-001 System board with UMA graphics subsystem memory for use only in the People's Republic of China and Russia 605169-001 System board with discrete graphics subsystem memory for use only in the People's Republic of China and Russia 605170-001 System board - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 51
● Magnetic screwdriver ● Phillips P0 and P1 screwdrivers ● Torx T8 screwdriver Service considerations The following sections include some of the considerations that you must keep in Apply pressure only at the points designated in the maintenance instructions. Preliminary replacement requirements 43 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 52
Cables and connectors CAUTION: When servicing the computer, be sure that cables are placed in their proper locations during the reassembly process. Improper cable placement can damage the computer. Cables must - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 53
Grounding guidelines Electrostatic discharge damage Electronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure determine the degree of sensitivity. Networks built into many integrated circuits provide some protection, but in many cases, ESD contains enough - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 54
material. ● Use a wrist strap connected to a properly grounded work surface and use properly grounded tools and equipment. ● Use conductive field service tools, such as cutters, screwdrivers, and vacuums. ● When fixtures must directly contact dissipative surfaces, use fixtures made only of static - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 55
with ground cords of one megohm resistance ● Static-dissipative tables or floor mats with hard ties to the ground ● Field service kits ● Static awareness labels ● Material-handling packages ● Nonconductive plastic bags, tubes, or boxes ● Metal tote boxes ● Electrostatic voltage levels and - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 56
This number provides specific information about the product's hardware components. The part number helps a service technician to determine what components and parts are needed. (4) Model description: This is the alphanumeric identifier used to locate documents, drivers, and support for the computer - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 57
Computer feet The computer feet are adhesive-backed rubber pads. The feet are included in the Rubber Kit, spare part number 598678-001. There are 4 rubber feet that attach to the base enclosure in the locations illustrated below. Component replacement procedures 49 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 58
Battery Description 8-cell, 73-Wh, 2.55-Ah Li-on battery for use in computers with 17.3-in displays 6-cell, 47-Wh, 2.2-Ah Li-on battery for use in computers with 15.6-in displays 6-cell, 93-Wh, 2.8-Ah Li-on battery for use in computers with 15.6-in displays Spare part number 593576-001 593572-001 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 59
button board For use in computers with 17.3-in displays 598675-001 For use in computers with 15.6-in displays 598674-001 Keyboards for use in computers with 17.3-in displays 598692-xx1 Keyboards for use in computers with 15.6-in displays 598691-xx1 NOTE: For a detailed list of available - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 60
2. To remove the switch cover, remove the following: (1) Two screw covers on the rear edge of the computer (2) Two PM2.5×2.5 screws (3) Three PM2.0×2.5 broadhead screws located in the battery bay 3. Open the computer as far as possible. 4. Slide the switch cover back (1), and then remove it from the - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 61
5. Remove the two Phillips PM2.5×5.0screws that secure the keyboard to the computer. 6. Slide the keyboard back toward the display (1), and then rotate it forward (2) until it rests upsidedown (3) the palm rest. Component replacement procedures 53 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 62
Release the zero insertion force (ZIF) connector (1) to which the keyboard cable is attached, and disconnect the keyboard cable (2) from the system board. NOTE: Only disconnect the keyboard cable from the system board when replacing the keyboard or removing the top cover. It is not recommended that - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 63
the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). NOTE: It is not necessary to disconnect the keyboard cable from the system board to remove the memory modules. Remove the memory module: 1. Position the - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 64
3. Remove the memory module (2) by pulling the module away from the slot at an angle. NOTE: Memory modules are designed with a notch to prevent incorrect insertion into the memory module slot. Reverse this procedure to install a memory module. Optical drive NOTE: All optical drive spare part kits - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 65
4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). NOTE: It is not necessary to disconnect the keyboard cable from the system board to remove the optical drive. Remove the optical drive: 1. Position the computer with - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 66
the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 58 Chapter 4 Removal and replacement procedures - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 67
Remove the power button board. 1. Release the ZIF connector (1) and disconnect the ribbon cable (2) from the system board. 2. Remove the screw (1) that secures the power button board to the base pan and the slide the board out of the retainer (2) to the left (3) to remove it. Reverse this procedure - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 68
Speakers Description For use in computers with 17.3-in displays For use in computers with 15.6-in displays Spare part number 598686-001 598685-001 Before removing the speakers, follow these steps: 1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 69
3. Remove the cables from the routing channels and lift the speakers (3) from the computer. Remove the speakers from the 15.6-in computer: 1. Remove the two PM2.5x6.0 screws (1) that secure the speakers to the top cover. 2. Disconnect the speaker cable connector (2) from the system board. Component - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 70
the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). NOTE: It is not necessary to disconnect the keyboard cable from the system board before removing the thermal shield. 62 Chapter 4 Removal and replacement - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 71
Remove the thermal shield on the 17.3-in computer: 1. Position the computer right-side up with the front toward you. 2. Remove the PM2.5×3.0 screw (1) from the thermal shield. 3. Raise the thermal shield (2) and remove it (3) from the computer. Remove the thermal shield on the 15.6-in computer: 1. - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 72
Reverse this procedure to reassemble and install an optical drive. 64 Chapter 4 Removal and replacement procedures - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 73
WLAN module Description Spare part number Intel Centrino Advanced-N6200 802.11 a/b/g/n 2x2 For use in Andorra, Antigua & Barbuda, Argentina, Australia, Austria, Azerbaijan, Bahamas, Bahrain, Barbados, Belgium, Bolivia, Bosnia & Herzegovina, Brazil, Brunei, Bulgaria, Canada, Chile, China, Colombia - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 74
your country or region. If you replace the module and then receive a warning message, remove the module to restore computer functionality, and then contact technical support through Help and Support. 66 Chapter 4 Removal and replacement procedures - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 75
AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the following components: a. Switch cover and keyboard (see Switch cover and keyboard on page 51) b. Thermal shield (see Thermal shield on page 62) Remove the WLAN module: 1. Position the computer right-side up - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 76
include a WWAN module. NOTE: The spare part number for the HP un2420 Broadband Module is 531993-001. CAUTION: To prevent an unresponsive the module to restore computer functionality, and then contact technical support through Help and Support. Before removing the WWAN module, follow these steps: - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 77
4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51) Remove the WWAN module: 1. Position the computer right-side up with the front toward you. 2. Disconnect the WWAN antenna cables (1) from the - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 78
AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the following components: a. Switch cover and keyboard (see Switch cover and keyboard on page 51). b. Thermal shield (see Thermal shield on page 62). Remove the heat sink: ● For computers with discrete subsystem - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 79
3. Disconnect the fan cable from the system board (7), and then remove the heat sink (8). Component replacement procedures 71 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 80
4. Clean the thermal material from the surfaces of the heat sink components (1) and (3) and from the system board (2) and (4) when the heat sink is removed. Replacement thermal material is included with all heat sink, system board, and processor spare part kits. ● For computers with UMA subsystem - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 81
3. Disconnect the fan cable from the system board (5), and remove the heat sink (6). Component replacement procedures 73 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 82
4. Clean the thermal material from the surfaces of the heat sink components (1) and the system board (2) each time the heat sink is removed. Replacement thermal material is included with all heat sink, system board, and processor spare part kits. Reverse this procedure to install the heat sink and - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 83
and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 6. Remove the thermal shield (see Thermal shield on page 62). 7. Remove the heat sink and fan (see Heat sink - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 84
then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). Remove the palm rest: 1. Position the computer right-side up with the front toward you. 2. Remove the three Phillips - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 85
4. Release the ZIF connectors (1) and (3) to which the TouchPad and fingerprint cables are connected, and then disconnect the cables (2) and (4) from the system board. NOTE: Only select models are equipped with fingerprint readers. 5. Remove the palm rest. Reverse this procedure to install the palm - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 86
from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the Switch cover and keyboard (see Switch cover and keyboard on page 51). NOTE: It is not necessary to remove the keyboard cable from the system board when removing the hard drive. 6. Remove the palm rest (see Palm rest on - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 87
4. Remove the hard drive (4) from the hard drive bay. 5. If it is necessary to replace the hard drive bracket, remove the two Phillips PM3.0×4.0 hard drive bracket screws (1) from each side of the hard drive. 6. Lift the bracket (2) straight up to remove it from the hard drive. Reverse this - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 88
and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 6. Disconnect the power button cable from the system board (see Power button board on page 58). 7. Remove the - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 89
the tape, clips, and routing channels built into the top cover. Remove the display assembly: CAUTION: Support the display assembly when removing the following screws. Failure to support the display assembly can result in damage to the display assembly and other computer components. 1. Remove the - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 90
2. Lift the display assembly (2) straight up. 3. If it is necessary to replace the display bezel, display enclosure, or display hinges, remove the two mylar screw covers (1) at the bottom corners of the display and the two Torx M2.0×6.0 screws (2) that secure the display bezel to the display - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 91
5. When the bezel is free, lift it (4) from the display. 6. If it is necessary to replace the webcam module, gently pull the webcam module away from the double-sided tape on the display enclosure (1) and disconnect the webcam cable from the module (2).The webcam module with cable can be ordered by - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 92
7. If it is necessary to replace the display hinges, remove the display panel by removing the two Torx M2.0×6.0 screws (1) that secure the panel to the top of the display enclosure, and then remove the four Torx M2.0×6.0 screws (2) located at the hinge arms. This will allow the panel to be lifted - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 93
10. Disconnect the display cable from the back of the display panel (3) and remove the webcam cable (4) from the raceway. The display cable is spared in the LCD cable kit, spare part number 599806-001. Reverse this procedure to reassemble and install the display assembly. Component replacement - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 94
the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 86 Chapter 4 Removal and replacement procedures - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 95
computer right-side up with the front toward you. 2. Open the computer as far as possible. CAUTION: Support the display assembly when removing the retaining screws. Failure to support the display assembly can result in damage to the display assembly and other computer components. 3. Remove the six - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 96
4. Lift the display assembly up and off the computer (2). 5. If it is necessary to replace the display bezel, display enclosure, or display hinges, remove the two mylar screw covers (1) and the 2 Torx M2.5×6.0 screws (2) that secure the display bezel to the display assembly. The screw covers are - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 97
7. Lift the bezel (4) until it disengages completely. 8. If it is necessary to replace the webcam module, gently pull the webcam module away from the double-sided tape on the display enclosure (1) and disconnect the webcam cable from the module (2). The webcam module and cable can be ordered by - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 98
10. Remove the display panel from the housing (3). 11. Remove the six Phillips PM2.0×3.0 screws (1) that secure the display hinges to the display panel, and then remove the display hinges (2). The left and right display hinges are available in the Hinge Kit, spare part number 598679-001 for - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 99
2. Remove the webcam cable (3)from the raceway and then, remove the cable assembly (4). NOTE: The cables are attached to the display panel with adhesive tape. To remove the WLAN and WWAN antennas: 1. Peel the WLAN (1) and WWAN (2) antenna receivers from the housing. 2. Route the antenna cables (3) - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 100
and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 6. Remove the optical drive (see Optical drive on page 56). 7. Remove the power button board cable (see Power - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 101
2. Disconnect the power button board cable from the system board by releasing the ZIF connector (1), and then disconnecting the cable (2). 3. Remove the 17 Torx M2.5×6.0 screws that secure the top cover to the computer. Component replacement procedures 93 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 102
4. Remove the ExpressCard bezel (1), then angle the top cover up (2), and lift it up (3) until it disengages from the base enclosure. Remove the top cover on 15.6-in computers: 1. Position the computer right-side up with the front toward you. 2. Disconnect the power button board cable from the - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 103
3. Remove the 10 Torx M2.5×6.0 screws that secure the top cover to the computer. 4. Remove the ExpressCard bezel (1), then angle the top cover up (2), and lift it up (3) until it disengages from the base enclosure. Reverse this procedure to install the top cover. Component replacement procedures 95 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 104
and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 6. Remove the optical drive (see Optical drive on page 56). 7. Remove the power button board cable (see Power - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 105
2. Release the RTC battery from the socket (1) on the system board and lift the battery (2) up. Reverse this procedure to install the RTC battery. Component replacement procedures 97 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 106
page 30 for more Cable Kit spare part number information. Description HP Integrated Bluetooth 2.1 module for use in all countries and regions see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 6. Remove the optical drive (see Optical drive - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 107
the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 6. Remove the optical drive (see Optical drive on page 56). Component replacement procedures 99 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 108
7. Remove the power button board cable (see Power button board on page 58). 8. Remove the speakers (see Speakers on page 60). 9. Remove the thermal shield (see Thermal shield on page 62). 10. Remove the display assembly (see Display assembly on computers with 17.3-in displays on page 80 or Display - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 109
and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 6. Remove the optical drive (see Optical drive on page 56). 7. Remove the power button board cable (see Power - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 110
4. Remove the audio board (4) by pulling the module straight up and off the computer. Reverse this procedure to install the audio board. 102 Chapter 4 Removal and replacement procedures - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 111
and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 6. Remove the optical drive (see Optical drive on page 56). 7. Remove the power button board cable (see Power - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 112
When replacing the system board, be sure that the following components are removed from the defective system board and installed on the replacement system board: ● Memory module (see Memory module on page 55) ● WLAN module (see WLAN module on page 65) ● WWAN module (see WWAN module on page 68) ● - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 113
6. Disconnect the power cable (1) from the system board and the connector (2) from the computer. 7. Disconnect the RJ11 cable (1) from the system board and the connector (2) from the computer. Component replacement procedures 105 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 114
and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 6. Remove the optical drive (see Optical drive on page 56). 7. Remove the power button board cable (see Power - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 115
9. Remove the thermal shield (see Thermal shield on page 62). 10. Remove the display assembly (see Display assembly on computers with 17.3-in displays on page 80 or Display assembly on computers with 15.6-in displays on page 86). 11. Remove the palm rest (see Palm rest on page 76). 12. Remove the - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 116
and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the switch cover and keyboard (see Switch cover and keyboard on page 51). 6. Remove the optical drive (see Optical drive on page 56). 7. Remove the power button board cable (see Power - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 117
the AC adapter from the computer. 4. Remove the battery (see Battery on page 50). 5. Remove the following components: a. Switch cover and keyboard (see Switch cover and keyboard on page 51) b. Optical drive (see Optical drive on page 56) c. Power button board cable (see Power button board on page 58 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 118
e. Thermal shield (see Thermal shield on page 62) f. Display assembly (see Display assembly on computers with 17.3-in displays on page 80 or Display assembly on computers with 15.6-in displays on page 86) g. Palm rest (see Palm rest on page 76) h. Hard drive (see Hard drive on page 78) i. Top cover - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 119
NOTE: Some of the Computer Setup menu items listed in this guide may not be supported by your computer or your operating system. NOTE: An external keyboard or mouse connected to a USB port can be used with Setup screen, press esc, and then follow the on-screen instructions. Computer Setup 111 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 120
pointing device (TouchPad, pointing stick, or USB mouse) or the keyboard to navigate and make selections in Computer Setup. 2. Press f10 Exit icon in the lower-left corner of the screen, and then follow the on-screen instructions. - or - Use the tab key and the arrow keys to select File > Ignore - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 121
the Computer Setup menu items listed in this chapter may not be supported by your computer or your operating system. File menu Select System the system. ● View specification information for the processor, cache and memory size, system ROM, video revision, and keyboard controller version. Set or - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 122
Select Ignore Changes and Exit Save Changes and Exit To do this Cancel any changes entered during the current session. Then exit and restart the computer. Save any changes entered during the current session. Then exit and restart the computer. Your changes go into effect when the computer restarts. - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 123
Enter, change, or delete a BIOS administrator password. Enroll or reset HP SpareKey, which is a set of security questions and answers used if by turning on (not restarting) the computer. Enable/disable Automatic DriveLock support (disabled by default). Run Disk Sanitizer to destroy all existing data - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 124
System Configuration menu NOTE: Some of the listed System Configuration options may not be supported by your computer or your operating system. Select Language Boot Options To do this Change the Computer Setup language. ● Set a startup menu delay (in seconds). ● - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 125
Select Device Configurations To do this ● Enable/disable USB legacy support (enabled by default). When enabled, USB legacy support allows the following: ◦ Use of a USB keyboard in Computer Setup even when a Windows operating system is not running. ◦ Startup from bootable USB devices, including a - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 126
fast charge (enabled by default). ● Enable/disable HP QuickLook 2 (enabled by default). ● Enable/disable preboot authentication on HP QuickLock boot (enabled by default). ● Enable/disable HP QuickWeb (enabled by default). ● Enable/disable HP QuickWeb write protect (disabled by default). ● Enable - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 127
◦ Boot to Network (default setting) ◦ Follow Boot Order ● Enable/disable the ambient light sensor (enabled by default). ● Enable/disable the notebook upgrade bay device (enabled by default). ● Enable/disable the fingerprint device (enabled by default). ● Enable/disable the integrated camera (enabled - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 128
on next boot. ● Select terminal emulation mode. Options include the following: ◦ ANSI (default setting) ◦ VT100 ● Enable/disable firmware progress event support. ● Enable/disable initiate Intel CIRA. Change, view, or hide security levels for all BIOS menu items. Restore the default security settings - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 129
6 Specifications Computer specifications Dimensions - 15.6-in Depth Width Height (front to rear) Dimensions - 17.3-in Depth Width Height (front to rear) Weight W 4.74 A 0°C to 35°C 5°C to 35°C -20°C to 60°C 32°F to 95°F 41°F to 95°F -4°F to 140°F 10% to 90% 5% to 95% Computer specifications 121 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 130
standards specify thermal limits for plastic surfaces. The computer operates well within this range of temperatures. 17.3-in display specifications Dimensions Height Width Diagonal Number of colors Contrast ratio Brightness Pixel resolution Format Configuration Backlight Response Time Total power - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 131
15.6-in display specifications Dimensions Height Width Diagonal Number of colors Contrast ratio Brightness Pixel resolution Format Configuration Backlight Response Time ), 300:1 (min AntiGlare)) 200 nits (typical) 1366 × 768 RGB LED 8 ms (typ) 4.1 W (max) SVA 15.6-in display specifications 123 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 132
to 131°F) (41°F to 131°F) (41°F to 131°F) *1 GB = 1 billion bytes when referring to hard drive storage capacity. Actual accessible capacity is less. Actual drive specifications may differ slightly. NOTE: Certain restrictions and exclusions apply. Contact technical support for details. 124 Chapter - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 133
DVD-ROM Drive specifications Applicable disc Access time Random Cache buffer Data transfer rate CD-R (24X) CD-RW (10X) CD-ROM (24X) DVD (8X) Multiword DMA mode 2 DVD-ROM CD rate) 3600 KB/s (150 KB/s at 1X CD rate) 10,800 KB/s (1,352 KB/s at 1X DVD rate) 16.6 MB/s DVD-ROM Drive specifications 125 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 134
DVD±RW Double-Layer Combo Drive specifications Applicable disc Access time Random Cache buffer Data transfer rate 24X CD-ROM 8X DVD-ROM 24X CD-R 16X CD-RW 8X DVD+R 4X DVD+ 10,800 KB/sec 5,400 KB/sec 10,800 KB/sec 5,400 KB/sec 2,700 KB/sec 6,750 KB/sec Multiword DMA Mode 126 Chapter 6 Specifications - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 135
Blu-ray Disc ROM Drive with SuperMulti DVD±R/RW Double-Layer specifications Applicable disc Access time Random Cache buffer Data transfer rate 24X CD-ROM 8X DVD-ROM 24X CD-R 16X KB/sec 4,500 KB/sec Multiword DMA Mode Blu-ray Disc ROM Drive with SuperMulti DVD±R/RW Double-Layer specifications 127 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 136
the computer to a previous state ● Recovering information using recovery tools NOTE: For detailed instructions, perform a search for these topics in Help and Support. NOTE: In case of system instability, HP recommends that you print the recovery procedures and save them for later use. Backing up - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 137
in your computer. NOTE: DVDs and DVDs with double-layer (DL) support store more information than CDs, so using them for backup reduces the number All Programs > Maintenance > Backup and Restore. 2. Follow the on-screen instructions to set up your backup, create a system image (select models only), - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 138
to fix problems that might prevent Support as the drivers, software, and guide. 3. If the Windows partition and the HP Recovery partition are listed, restart the computer, and then press f8 before the Windows operating system loads. 4. Select Repair your computer. 5. Follow the on-screen instructions - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 139
accessible. To order a Windows 7 operating system DVD, go to http://www.hp.com/support, select your country or region, and follow the on-screen instructions. You can also order the DVD by calling technical support. For contact information, refer to the Worldwide Telephone Numbers booklet included - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 140
the computer to a previous state ● Recovering information using recovery tools NOTE: For detailed instructions, perform a search for these topics in Help and Support. NOTE: In case of system instability, HP recommends that you print the recovery procedures and save them for later use. Backing up - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 141
NOTE: DVDs and DVDs with double-layer (DL) support store more information than CDs, so using them and Restore Center. 2. Follow the on-screen instructions to back up your entire computer (select models also use Windows Startup Repair to fix problems that might prevent Windows from starting correctly - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 142
and Support. Using f11 CAUTION: Using f11 completely erases hard drive contents and reformats the hard drive. All files you have created and any software installed on the computer are permanently removed. The f11 recovery tool reinstalls the operating system and HP programs and drivers that were - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 143
. To order a Windows Vista operating system DVD, go to http://www.hp.com/support, select your country or region, and follow the on-screen instructions. You can also order the DVD by calling technical support. For contact information, refer to the Worldwide Telephone Numbers booklet included with - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 144
and folders ● Scheduling automatic backups ● Creating recovery points ● Recovering information NOTE: For detailed instructions, perform a search for these topics in Help and Support. NOTE: In case of system instability, HP recommends that you print the recovery procedures and save them for later use - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 145
screen instructions. NOTE: For additional information on initiating a recovery in Windows, perform a search for this topic in Help and Support. operating system, software, and drivers. Software, drivers, and updates not installed by HP must be manually reinstalled. To recover your operating - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 146
on the computer. 5. Follow the on-screen instructions to install the operating system. 6. After the operating system is installed, remove the Operating System disc and insert the Driver Recovery disc. 7. Follow the on-screen instructions to install the drivers and programs. 138 Chapter 7 Backup and - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 147
8 Connector pin assignments Audio-in (microphone) Pin Signal 1 Audio signal in 2 Audio signal in 3 Ground Audio-out (headphone) Pin Signal 1 Audio out, left channel 2 Audio out, right channel 3 Ground Audio-in (microphone) 139 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 148
External monitor Pin Signal 1 Red analog 2 Green analog 3 Blue analog 4 Not connected 5 Ground 6 Ground analog 7 Ground analog 8 Ground analog 9 +5 VDC 10 Ground 11 Monitor detect 12 DDC 2B data 13 Horizontal sync 14 Vertical sync 15 DDC 2B clock 140 Chapter 8 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 149
HDMI Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Signal Transition minimized differential signal (TMDS) data 2+ TMDS data 2 shield TMDS data 2- TMDS data 1+ TMDS data 1 shield TMDS data 1- TMDS data 0+ TMDS data 0 shield TMDS data 0- TMDS clock+ TMDS clock shield TMDS clockConsumer - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 150
RJ-11 (modem) Pin Signal 1 Unused 2 Tip 3 Ring 4 Unused 5 Unused 6 Unused 142 Chapter 8 Connector pin assignments - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 151
RJ-45 (network) Pin Signal 1 Transmit + 2 Transmit - 3 Receive + 4 Unused 5 Unused 6 Receive - 7 Unused 8 Unused Universal Serial Bus Pin Signal 1 +5 VDC 2 Data - 3 Data + 4 Ground RJ-45 (network) 143 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 152
9 Power cord set requirements The wide range input feature of the computer permits it to operate from any line voltage from 100 to 120 volts AC or from 220 to 240 volts AC. The 3-conductor power cord set included with the computer meets the requirements for use in the country or region where the - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 153
Requirements for specific countries and regions Country/region Accredited agency Applicable note number Australia EANSW 1 Austria OVE 1 Belgium CEBC 1 Canada CSA for evaluation in the country or region where it will be used. Requirements for specific countries and regions 145 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 154
handle them carefully. NOTE: Materials Disposal. This HP product contains mercury in the backlight in the Web site at http://www.eiae.org. This section provides disassembly instructions for provided in this chapter are general disassembly instructions. Specific details, such as screw sizes, - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 155
Perform the following steps to disassemble the display assembly: 1. Remove all screw covers (1) and screws (2) that secure the display bezel to the display assembly. 2. Lift up and out on the left and right inside edges (1) and the top and bottom inside edges (2) of the display bezel until the bezel - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 156
4. Disconnect all display panel cables (1) from the display inverter and remove the inverter (2). 5. Remove all screws (1) that secure the display panel assembly to the display enclosure. 6. Remove the display panel assembly (2) from the display enclosure. 7. Turn the display panel assembly upside- - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 157
10. Remove the display panel frame (2) from the display panel. 11. Remove the screws (1) that secure the backlight cover to the display panel. 12. Lift the top edge of the backlight cover (2) and swing it outward. 13. Remove the backlight cover. 14. Turn the display panel right-side up. Display 149 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 158
15. Remove the backlight cables (1) from the clip (2) in the display panel. 16. Turn the display panel upside-down. WARNING! The backlight contains mercury. Exercise caution when removing and handling the backlight to avoid damaging this component and causing exposure to the mercury. 17. Remove the - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 159
18. Remove the backlight from the backlight frame. 19. Disconnect the display panel cable (1) from the LCD panel. 20. Remove the screws (2) that secure the LCD panel to the display rear panel. 21. Release the LCD panel (3) from the display rear panel. 22. Release the tape (4) that secures the LCD - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 160
20 AMT options AMT setup prompt (Ctrl-P) 120 firmware progress event support. 120 firmware verbosity 120 initiate Intel CIRA 120 termiinal emulation mode System Configuration menu 116 using 111 computer specifications 121 connector, power 15 connectors, service considerations 44 cord, power 20 D DC - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 161
panel removal 84, 90 display specifications 122, 123 drive light, identifying 14 DriveLock automatic 115 password 115 Driver Recovery disc 137 drives boot left TouchPad button 9 legacy support, USB 111, 117 lights AC adapter 15 caps lock 11 drive 14 HP QuickLook 11 HP QuickWeb 11 optical drive 15 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 162
56 spare part number 27, 32, 56 specifications 125, 126, 127 optical drive bezel, cards 4 fingerprint reader 5 graphics 1 hard drives 3 keyboard 5 memory module 2 modem module 3 operating system 5 5 processors 1 product name 1 security 5 serviceability 7 wireless 3 product name 1 Q QuickLook - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 163
HP SpareKey enrollment 115 password policy 115 set up BIOS administrator password 115 System IDs 115 user management 115 security, product description 5 service considerations 43 service tag, location 21, 48 serviceability number 24, 60 specifications Blu-ray Disc ROM 106 USB legacy support 111, 117 - HP ProBook 4720s | HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Page 164
WWAN module removal 68 spare part number 68 156 Index
HP ProBook 4520s Notebook PC
HP ProBook 4720s Notebook PC
Maintenance and Service Guide