HP ProBook 4420s HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai
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- HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 1
HP ProBook 4320s Notebook PC HP ProBook 4321s Notebook PC HP ProBook 4420s Notebook PC HP ProBook 4421s Notebook PC Maintenance and Service Guide SUMMARY This guide is a troubleshooting reference used for maintaining and servicing the computer. It provides comprehensive information on identifying - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 2
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 or omissions contained herein. First Edition: March 2010 Document Part Number - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - 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 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 4
iv Safety warning notice - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 5
15 Left-side components ...16 Bottom components ...17 Display ...18 Wireless antennas (select models only 19 Additional hardware components ...20 3 Illustrated ...43 Preliminary replacement requirements 43 Tools required ...43 Service considerations ...43 Plastic parts ...43 Cables and connectors - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 6
Computer feet ...48 Battery ...49 SIM ...50 Switch cover ...51 Keyboard ...53 Memory module ...55 Optical drive ...57 Power button board ...59 Speakers menu 101 System Configuration menu 102 Computer Setup in Windows Vista and Windows XP 104 Starting Computer Setup 104 Using Computer Setup ... - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 7
121 Blu-ray ROM with LightScribe DVD±R/RW SuperMulti DL Drive specifications 122 System resource specifications ...124 7 Backup and recovery ...125 Windows 7 backup and recovery ...125 Backing up ...125 Recovering ...126 Backup and recovery in Windows Vista 127 Overview ...127 Backing up - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 8
Recovering the operating system and programs 132 Linux backup and recovery ...132 8 Connector pin assignments ...134 Audio-in (microphone) ...134 for all countries and regions 142 Requirements for specific countries and regions 142 10 Recycling ...144 Battery ...144 Display ...144 Index ... - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 9
's Republic of China. HP ProBook 4321s Notebook PC √ NOTE: For use in the People's Republic of China. HP ProBook 4420s Notebook PC √ √ HP ProBook 4421s Notebook PC √ Intel® Arrandale™ ● i7-620M, 2.66-GHz (Turbo up to 3.33 GHz), √ √ √ √ 4-MB L3 cache, 4 threads ● i5-540M, 2.53-GHz - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 10
-MB total system memory (2048-MB + 1024-MB, dual channel) ● 2048-MB total system memory (2048-MB × 1) ● 2048-MB total system memory (1024-MB × 2, dual channel) ● 1024-MB total system memory (1024-MB × 1) HP ProBook 4320s HP ProBook4 320s / 4321s HP ProBook 4420s HP ProBook 4421s UMA Discrete - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 11
-GB, 7200-rpm HP 3D DriveGuard (not available on Linux) Fixed 12.7-mm (0.50-in) tray load Supports option of no optical drive Supports the following drives: ● Blu-ray ROM with LightScribe DVD±R/RW SuperMulti DL Drive NOTE: Not available with UMA base model and Window XP. ● DVD±RW SuperMulti Double - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 12
Ethernet Wireless External media cards Ports Description HP ProBook 4320s HP ProBook4 320s / 4321s HP ProBook 4420s HP ProBook 4421s UMA Discrete UMA Discrete Supports no modem option √ √ √ √ 10/100/1000 Ethernet network interface card (NIC) √ √ √ √ S3/S4/S5 wake on LAN (AC - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 13
Category Description HP ProBook 4320s HP ProBook4 320s / 4321s HP ProBook 4420s HP ProBook 4421s UMA Discrete UMA Discrete USB 2.0 (3) √ √ √ √ Combo eSATA/USB 2.0 (1) √ √ √ √ HDMI √ √ √ √ VGA (Dsub 15-pin) supporting 1600 × 1200 √ √ √ √ external resolution at 75-GHz ( - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 14
Category Description HP ProBook 4320s HP ProBook4 320s / 4321s HP ProBook 4420s HP ProBook 4421s UMA Discrete UMA Discrete Windows 7 Starter with Office 2007 Ready (excludes Japan) √ √ √ √ Windows 7 Starter with Office 2007 Ready - EDGI √ √ √ √ (available for Argentina, Brazil - - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 15
) Restore media: Windows 7 Professional 64 Windows 7 Professional 32 Windows 7 Home Premium 32 Windows 7 Home Basic 32 Windows 7 Starter Windows Vista Business 32 Windows Vista Home Basic 32 Windows XP Professional HP ProBook 4320s HP ProBook4 320s / 4321s HP ProBook 4420s HP ProBook 4421s UMA - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 16
Category Serviceability Description HP ProBook 4320s HP ProBook4 320s / 4321s HP ProBook 4420s HP ProBook 4421s UMA Discrete UMA Discrete Microsoft Office Ready DVD √ √ √ √ DRDVD Windows 7 Home Premium/Windows 7 √ √ √ √ Professional DRDVD Windows 7 Starter/Windows 7 Home Basic - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 17
this section. Use the following instructions to see a list of hardware installed in the computer. In Windows® 7: ▲ Select Start > Control installing software, running utilities, or changing Windows settings. Refer to Help and Support for more information. In Windows XP: 1. Select Start > My Computer - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 18
Top components TouchPad Component Description (1) TouchPad off indicator To turn the TouchPad zone on and off, quickly double-tap the TouchPad off indicator. NOTE: When the TouchPad zone is active, the light is off. (2) TouchPad zone* Moves the pointer and selects or activates items on the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 19
indicator (2) Caps lock light (3) HP QuickLook light (4) HP QuickWeb light (5) Power light (6) Wireless light Description ● Amber: The White: An integrated wireless device, such as a wireless local area network (WLAN) device and/or a Bluetooth® device, is on. ● Amber: All wireless devices are off - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 20
briefly to exit Standby. ● When the computer is in Hibernation, press the button briefly to exit Hibernation. If the computer has stopped responding and Windows® shutdown procedures are ineffective, press and hold the power button for at least 5 seconds to turn off the computer. To learn more about - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 21
in combination with the fn key. Executes frequently used system functions when pressed in combination with a function key or the esc key. Displays the Windows Start menu. Displays a shortcut menu for items beneath the cursor. Can be used like the keys on an external numeric keypad when pressed in - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 22
hard drive or optical drive 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) ● MultiMediaCard (MMC) ● Secure Digital (SD - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 23
Right-side components Component (1) USB ports (2) (2) RJ-11 (modem) jack (select models only) (3) Optical drive light (select models only) (4) Optical drive (select models only) Description Connect optional USB devices. Connects a modem cable. Blinking: The optical drive is being accessed. Reads - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - 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 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 25
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. Bottom components 17 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 26
Display NOTE: Your computer may look slightly different from the illustration in this section. 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 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 27
wireless signals to communicate with wireless wide area networks (WWANs). (2) WLAN antennas (2)* Send and receive wireless signals to communicate with wireless areas immediately around the antennas free from obstructions. To see wireless regulatory notices, refer to the section of the Regulatory, - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - 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 an external power source. (3) AC adapter Converts AC power to DC power. *Batteries and power cords vary in - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 29
, the serial number label, located on the bottom of the computer, provides important information that you may need when contacting technical support. (1) Product name (2) Serial number (3) Product number (4) Warranty period (5) Model description (select models) Serial number label location 21 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 30
Computer major components 22 Chapter 3 Illustrated parts catalog - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 31
.0-in) displays ● For with 35.6-cm (14.0-in) displays, red 599567-001 607652-001 599568-001 607653-001 Power button board (included with switch cover) Keyboard In computer models with 33.8-cm (13.3-in) displays: ● For use in Belgium ● For use in Brazil ● For use in Bulgaria ● For use in Canada - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 32
Item Description ● For use in France ● For use in French Arabic region ● For use in Germany ● For use in Greece ● For use in Hungary ● For use in Iceland ● For use in Israel ● For use in Italy ● For use in Japan ● For use in Korea ● For use in Latin America ● For use in Norway ● For use in Portugal - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 33
Item (5) (6) (7) Description ● For use in Germany ● For use in Greece ● For use in Hungary ● For use in Iceland ● For use in Israel ● For use in Italy ● For use in Japan ● For use in Korea ● For use in Latin America ● For use in Norway ● For use in Portugal ● For use in Russia ● For use in Saudi - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 34
Memory Architecture (UMA) graphics subsystems 599546-001 Memory module (PC3-10600, 1333-MHz, DDR3, shared) 2048-MB 598856-002 1024-MB 598859-002 Bluetooth Hungary, Iceland, India, Indonesia, Ireland, , Senegal, Serbia, Singapore, Slovakia, Slovenia, -001 Intel Centrino Wireless-N 1000 802.11b - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 35
Wireless-N 1000 802.11b/g 1x2 for use in Russia and Ukraine 585984-001 Intel WiFi , Honduras, Hong Kong, Hungary, Iceland, India, Indonesia, Ireland, Israel, Italy, the Saudi Arabia, Senegal, Serbia, the Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, the Solomon Islands, Somalia, South - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 36
Arrandale 540M 2.53-GHz ● Intel Arrandale Core 620M 2.26-GHz ● Intel Arrandale i3-330M 2.13-GHz ● Intel Arrandale i3-350M 2.26-GHz ● Intel Arrandale i5-430M 2.26-GHz Spare part number 594187 -001 SIM (provided by your wireless vendor for use with WWAN option) 28 Chapter 3 Illustrated parts catalog - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 37
Item (28) Description Optical drive (includes bezel) Blu-ray Disc ROM Drive with SuperMulti DVD±R/RW Double-Layer DVD±RW SuperMulti Double-Layer Drive with LightScribe DVD ROM Drive Display assembly components Spare part number 599538-001 599540-001 599539-001 Display assembly components 29 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 38
Item Description (1) Display bezel ● For 33.8-cm (13.3-in) displays with webcam ● For 35.6-cm (14.0-in) displays with webcam ● For 33.8-cm (13.3-in) displays without webcam ● For 35.6-cm (14.0-in) displays without webcam (2) Webcam module (3) Display panel (included with display assembly; see - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 39
Plastics Kit Item Description Plastics Kit: (1) ExpressCard slot bezel (2) Optical drive blank (used with no ODD option) RJ11 (modem) connector blank (not illustrated, used with No-Modem option) Spare part number 599563-001 Plastics Kit 31 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 40
Cable kit Item (1) (2) (3) Description Cable kit: Power cable Bluetooth cable RJ-11 (modem) jack cable Spare part number 599525-001 32 Chapter 3 Illustrated parts catalog - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 41
320-GB, 7200-rpm 250-GB, 7200-rpm (2) Optical drive (includes bezel) Blu-ray Disc ROM Drive with SuperMulti DVD ±R/RW Double-Layer DVD±RW SuperMulti Double-Layer Drive with LightScribe DVD-ROM Drive Spare part number 599543-001 599542-001 599541-001 599538-001 599540-001 599539-001 Mass storage - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 42
For use in Brazil ● For use in Denmark ● For use in Europe ● For use in India ● For use in Israel ● For use in Italy ● For use in Japan ● For use Switzerland ● For use in Taiwan ● For use in the United Kingdom and Singapore Spare part number 463958-001 577170-001 463955-001 535593-001 490371-D01 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 43
Description Rubber kit (includes display bumpers, display screw covers, base enclosure feet, and display hinge bumpers) Screw kit, includes: ● T8 slotted-torx M2.5x6.5 ● T8 slotted-torx M2.5x5.0 ● T8 slotted-torx M2.5x3.0 ● Phillips P1 M2.5x5.0 ● Phillips P1 M2.5x3.0 ● Phillips P1 M2.0x3.0 ● - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 44
pin, black, 1.83 m), for use in Argentina Power cord (AC power, 3-pin, black, 1.83 m), for use in India HP Mobile Broadband Module HP Mobile Broadband Module Broadcom 4312G 802.11b/g WiFi Adapter for use in Canada, the Cayman Islands, Guam, Puerto Rico, the United States, and the U.S. Virgin Islands - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 45
Tome and Principe, Saudi Arabia, Senegal, Serbia, the Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, the Solomon Islands, Somalia, South Africa, South Korea, HSPA 90-W Slimline AC adapter for use in India Bluetooth module (without cable) Intel WiFi Link 6200 802.11 a/g/n for use in Andorra - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 46
, Venezuela, and Vietnam 65-W, 3-pin Smart AC adapter for use in India Intel Centrino Wireless-N 1000 802.11b/g 1x2 for use in Russia and Ukraine Processor, Intel Arrandale Core 620M 2.26-GHz Realtek RTL8191SE 802.11b/g/n 1x1 WiFi Adapter Battery, 6-cell, 47-Wh (2.2Ah) Li-ion Battery, 9-cell, 93 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 47
(13.3-in) models Display hinge and bracket (left and right) for 35.6-cm (14.0-in) models Blu-ray Disc ROM Drive with SuperMulti DVD ±R/RW Double-Layer DVD ROM Drive DVD ±RW SuperMulti Double-Layer Drive with LightScribe Hard drive, 250-GB, 7200-rpm Hard drive, 320-GB, 7200-rpm Hard drive, 500 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 48
.8-cm (13.3-in), for use in Canada (French) Keyboard, 33.8-cm (13.3-in), for use in Portugal Keyboard, 33.8-cm (13.3-in), for use in Turkey Keyboard, 33.8-cm (13.3-in), for use in Latin America Keyboard, 33.8-cm (13.3-in), for use in Saudi Arabia Keyboard, 33.8-cm (13.3-in), for use in Brazil - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 49
599573-B31 599573-B71 599573-BA1 599573-BB1 599573-BG1 599573-DD1 599573-DJ1 Description Keyboard, 33.8-cm (13.3-in), for use in Switzerland Keyboard, 33.8-cm (13.3-in), for use in Iceland Keyboard, 33.8-cm (13.3-in), for use in Greece Keyboard, 33.8-cm (13.3-in), for use in French Arabic region - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 50
-001 608739-001 608740-001 608741-001 608742-001 608743-001 Description Keyboard, 35.6-cm (14.0-in), for use in French Arabic region Processor use with discrete graphics subsystem Processor heat sink for use with Unified Memory Architecture (UMA) graphics subsystem Display back cover for 35.6-cm (14 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 51
T8 screwdriver Service considerations The following sections include some of the considerations that you must keep in mind during disassembly and to prevent damage. Plastic parts CAUTION: Using excessive force during disassembly and reassembly can damage plastic parts. Use care when handling the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - 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 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - 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 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - 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 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - 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 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 56
8 different sizes, that must be removed, replaced, or loosened when servicing the computer. Make special note of each screw size and location during , provides important information that you may need when contacting technical support. NOTE: Serial number label color varies on select models. - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 57
Battery Description Battery 9-cell, 93-Wh (2.8Ah) Li-ion 6-cell, 47-Wh (2.2Ah) Li-ion Spare part number 593573-001 593572-001 Before disassembling the computer, follow these steps: 1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 58
section applies only to select models with WWAN capability. NOTE: If there is a SIM inserted in the SIM slot, it must be removed before disassembling the computer. Be sure that the SIM is reinserted in the SIM slot after reassembling the computer. Before removing the SIM, follow these steps: 1. Shut - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 59
Switch cover Description Switch cover ● For with 33.8-cm (13.3-in) displays ● For with 33.8-cm (13.3-in) displays, red ● For with 35.6-cm (14.0-in) displays ● For with 35.6-cm (14.0-in) displays, red Spare part number 599567-001 607652-001 599568-001 607653-001 Before removing the switch cover, - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 60
4. Slide the switch cover back (1), and then remove it from the computer (2). Reverse this procedure to install the switch cover and keyboard. 52 Chapter 4 Removal and replacement procedures - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 61
the battery (see Battery on page 49). 5. Remove the switch cover (see Switch cover on page 51). Remove the keyboard: 1. Remove the three Phillips PM2.5×3.0 screws that secure the keyboard to the computer. NOTE: On computer models with 35.6-cm (14.0-in) displays, remove four screws that secure the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 62
(2) until it rests upside down on the right side of the computer. 3. 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. 4. Remove the keyboard (3). 54 Chapter 4 Removal and replacement procedures - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 63
on page 53). NOTE: You can release the keyboard without removing the keyboard cable from the system board, and then rotate it right until it rests upside down on the right side of the computer to remove the memory modules. Remove the memory module: 1. Position the computer right-side up with - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - 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 (3) to prevent incorrect insertion into the memory module slot. Reverse this procedure to install a memory module. 56 Chapter 4 Removal and replacement procedures - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 65
-ray ROM with LightScribe DVD±R/RW SuperMulti DL Drive DVD ±RW SuperMulti Double-Layer Drive with LightScribe DVD ROM Drive Spare part on page 51). 6. Remove the keyboard (see Keyboard on page 53) NOTE: You can release the keyboard without removing the keyboard cable from the system board, and then - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 66
4. Remove the optical drive (3) from the computer. 5. If it is necessary to replace the optical drive bracket, position the optical drive with the rear toward you. 6. Remove the two Phillips PM2.0×3.0 screws (1) that secure the optical drive bracket to the optical drive. 7. Remove the optical drive - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 67
Power button board Description Power button board with cable (included with switch cover, see Switch cover on page 51) Before removing the power button board, follow these steps: 1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 68
the AC outlet and then unplugging the AC adapter from the computer. 4. Remove the battery (see Battery on page 49). 5. Remove the switch cover and keyboard (see Switch cover on page 51). Remove the speakers: 1. Position the computer right-side up with the front toward you. 2. Disconnect the speaker - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 69
Reverse this procedure to install the speakers. Component replacement procedures 61 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 70
wireless devices in 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 on page 51) 6. Remove the keyboard (see Keyboard on page 53) Remove the WWAN - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 71
4. Remove the WWAN module (3) by pulling the module away from the slot at an angle. NOTE: WWAN modules are designed with a notch (4) to prevent incorrect insertion. Reverse this procedure to install the WWAN module. Component replacement procedures 63 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 72
from the computer. 4. Remove the battery (see Battery on page 49). 5. Remove the switch cover (see Switch cover on page 51) 6. Remove the keyboard (see Keyboard on page 53) Remove the palm rest: 1. Position the computer right-side up with the front toward you. 2. Remove the three Phillips PM2 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 73
3. Slide the palm rest to the right (2), and then turn it over from the front edge (3) until it rests upside down on the top cover. 4. Release the fingerprint reader connector (1), and then remove the fingerprint reader cable (2) from the system board. 5. Release the TouchPad cable connector (3), - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 74
from the computer. 4. Remove the battery (see Battery on page 49). 5. Remove the following components: a. Switch cover (see Switch cover on page 51) b. Keyboard (see Keyboard on page 53) c. Palm rest (see Palm rest on page 64) Remove the hard drive: 1. Position the computer right-side up with the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 75
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 PM3.0×3.0 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 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 76
AC adapter from the computer. 4. Remove the following components: a. Battery (see Battery on page 49) b. Switch cover (see Switch cover on page 51) c. Keyboard (see Keyboard on page 53) d. Palm rest (see Palm rest on page 64) Remove the RTC battery: 1. Disconnect the RTC battery connector from the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 77
, Honduras, Hong Kong, Hungary, Iceland, India, Indonesia, Ireland, Israel, Italy, the Ivory San Marino, Saudi Arabia, Senegal, Serbia, Singapore, Slovakia, Slovenia, South Africa, South Korea, Centrino Wireless-N 1000 802.11b/g 1x2 for use in Russia and Ukraine 585984-001 Intel WiFi Link 6200 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 78
India Leone, Singapore, Slovakia, wireless devices in 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 page 51) b. Keyboard (see Keyboard on page 53 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 79
3. Remove the two Phillips PM2.5×3.0 screws (2) that secure the WLAN module to the computer. (The edge of the module opposite the slot rises away from the computer.) 4. Remove the WLAN module (3) by pulling the module away from the slot at an angle. NOTE: WLAN modules are designed with a notch (4) - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 80
(see Battery on page 49). 5. Remove the following components: a. Switch cover (see Switch cover on page 51) b. Keyboard (see Keyboard on page 53) c. Palm rest (see Palm rest on page 64) Remove the Bluetooth module: 1. Position the computer right-side up with the front toward you. 2. Remove the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 81
Reverse this procedure to install the Bluetooth module. Component replacement procedures 73 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 82
use with discrete graphics subsystems For use with Unified Memory Architecture (UMA) graphics subsystems Spare part number 599544 Remove the following components: a. Switch cover (see Switch cover on page 51) b. Keyboard (see Keyboard on page 53) c. Palm rest (see Palm rest on page 64) Remove the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 83
4. Lift the right edge of the heat shield to disengage the tabs on the left side of the heat shield from the top cover, and then remove the heat shield (3). 5. Disconnect the fan cable from the system board (1). 6. Loosen the 2.0×5.0 captive screw from the system board, and then remove the fan (3). - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 84
NOTE: Loosen the two additional screws that secure the heat sink to the graphics devices on models with discrete graphics subsystem memory. 8. Lift the heat sink off the processor (2), and then lift the heat sink up and to the right to remove the heat sink from the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 85
Reverse this procedure to install the heat sink and fan. Component replacement procedures 77 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 86
● Intel Arrandale Core 620M 2.26-GHz ● Intel Arrandale i3-330M 2.13-GHz ● Intel Arrandale i3-350M 2.26-GHz ● Intel Arrandale i5-430M 2.26- the following components: a. Switch cover (see Switch cover on page 51) b. Keyboard (see Keyboard on page 53) c. Optical drive (see Optical drive on page 57) d. - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 87
3. Lift the processor (2) straight up and remove it. NOTE: When you install the processor, the gold triangle (3) on the processor must be aligned with the triangle (4) embossed on the processor socket. Reverse this procedure to install the processor. Component replacement procedures 79 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 88
from the computer. 4. Remove the battery (see Battery on page 49). 5. Remove the following components: a. Switch cover (see Switch cover on page 51) b. Keyboard (see Keyboard on page 53) c. Fan and heat sink (see Heat sink and fan on page 74) d. Speakers (see Speakers on page 60) Remove the power - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 89
Display assembly NOTE: The display assembly spare part kit includes 2 WLAN antennas and cables. Description Spare part number Display assembly (includes 2 WLAN antennas and cables and, on select computer models, 2 WWAN antennas and cables) NOTE: WWAN is available only on select models with 33.8- - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 90
from the computer. 4. Remove the battery (see Battery on page 49). 5. Remove the following components: a. Switch cover (see Switch cover on page 51) b. Keyboard (see Keyboard on page 53) c. Speakers (see Speakers on page 60) d. Palm rest (see Palm rest on page 64) e. WWAN cables (see WWAN module on - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 91
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 five T8 slotted-Torx M2.5×6.0 screws (1) that secure - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 92
4. If it is necessary to replace the display bezel, display enclosure, or display hinges, remove the four Mylar screw covers (1) and the four T8 slotted-Torx M2.5×6.0 screws (2) that secure the display bezel to the display assembly. The screw covers are available in the rubber kit, spare part number - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 93
6. If it is necessary to replace the webcam module, gently pull the webcam module away from the double-sided tape on the display back cover (1), disconnect the webcam cable from the module (2), and then remove the webcam. NOTE: To replace the webcam module in the display enclosure, align the holes - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 94
8. Lift the top of the display panel away from the back cover (3), and then remove the display panel (4). 9. Remove the four 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 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 95
11. Release the cable from the display panel connector (3). NOTE: The display cable includes the microphone and webcam connector. 12. Gently pull the integrated microphone (1) from the clips at the top of the display back cover, remove the display cable from the clips and routing channels (2) along - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 96
adhesive on the back cover, and then route the cables through the clips (3) that secure the antenna cables to the display back cover. b. Remove the wireless antennas and cables. Reverse this procedure to reassemble and install the display assembly. 88 Chapter 4 Removal and replacement procedures - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 97
the computer. 4. Remove the battery (see Battery on page 49). 5. Remove the following components: a. Switch cover (see Switch cover on page 51) b. Keyboard (see Keyboard on page 53) c. Speakers (see Speakers on page 60) d. Optical drive (see Optical drive on page 57) e. Palm rest (see Palm rest on - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 98
3. If installed, remove the ExpressCard slot bezel (1), release the top cover from the sides of the base enclosure (2), and then remove the top cover (3). Reverse this procedure to install the top cover. 90 Chapter 4 Removal and replacement procedures - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 99
the computer. 4. Remove the battery (see Battery on page 49). 5. Remove the following components: a. Switch cover (see Switch cover on page 51) b. Keyboard (see Keyboard on page 53) c. Optical drive (see Optical drive on page 57) d. Speakers (see Speakers on page 60) e. Palm rest (see Palm rest on - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 100
4. Disconnect the modem module cable (3). 5. Remove the modem module. Reverse this procedure to install the modem module. 92 Chapter 4 Removal and replacement procedures - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 101
(see Keyboard on page 53) d. Speakers (see Speakers on page 60) e. WWAN module (see WWAN module on page 62) f. Palm rest (see Palm rest on page 64) g. Bluetooth module and cable (see Bluetooth module on page 72) h. WLAN module (see WLAN module on page 69) i. Hard drive (see Hard drive on page - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 102
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 69) ● WWAN module (see WWAN module on page 62) ● Modem module (see - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 103
the computer. 4. Remove the battery (see Battery on page 49). 5. Remove the following components: a. Switch cover (see Switch cover on page 51) b. Keyboard (see Keyboard on page 53) c. Optical drive (see Optical drive on page 57) d. Speakers (see Speakers on page 60) e. Palm rest (see Palm rest on - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 104
the computer. 4. Remove the battery (see Battery on page 49). 5. Remove the following components: a. Switch cover (see Switch cover on page 51) b. Keyboard (see Keyboard on page 53) c. Optical drive (see Optical drive on page 57) d. Speakers (see Speakers on page 60) e. Palm rest (see Palm rest on - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 105
3. Remove the modem cable (2) from the routing in the base enclosure. 4. Remove the modem cable. Reverse this procedure to install the modem cable. Component replacement procedures 97 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 106
this guide may not be supported by your computer. NOTE: An external keyboard connected by USB can be used with Computer Setup only if USB legacy support is the on-screen instructions. NOTE: You can use either a pointing device (TouchPad, pointing stick, or USB mouse) or the keyboard to navigate and - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 107
on-screen instructions. - or Menu" message is supported by your computer. File menu Select System information To do this ● View identification information for the computer. ● View specification information for the processor, cache and memory size, and system ROM. Computer Setup in Windows - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 108
and time ● Set date: MM:DD:YYYY ● Set time: HH:MM ● F1: System information ● F2: Start-up test ● F3: Run-in test ● F4: Hard disk test Replace the configuration settings in Computer Setup with the original factory settings. (Password settings and security settings are not changed when you restore the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 109
of the menu items listed in this section may not be supported by your computer. Select To do this Administrator Tools BIOS HP SpareKey Enrollment Enroll or reset HP SpareKey, which is a set of security questions and answers used if you forget your password. Disk Sanitizer Run Disk - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 110
Some of the listed System Configuration options may not be supported by your computer. Select Language Boot options To do PXE Internal NIC boot. ● Set the UEFI boot order: Windows Boot Manager. ● Set the legacy boot order: ◦ 1st boot device: Notebook hard drive ◦ 2nd boot device: USB floppy ◦ 3rd - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 111
Select Device configurations To do this ● Enable Fn Key Switch ● Enable/disable USB legacy support. When enabled, USB legacy support allows the following: ◦ Use of a USB keyboard in Computer Setup even when your operating system is not running. ◦ Startup from bootable USB devices, including a hard - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 112
Windows XP Starting Computer Setup Computer Setup is a preinstalled, ROM-based utility that can be used even when the operating system is not working or will not load. NOTE: Some of the Computer Setup menu items listed in this guide may not be supported by your computer. NOTE: An external keyboard - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 113
message is displayed at the bottom of the screen. ● To select a menu or a menu item, use the tab key and the keyboard instructions. NOTE: You can use either a pointing device (TouchPad, pointing stick, or USB mouse) or the keyboard screen instructions. - instructions Menu" message is instructions. - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 114
Your changes go into effect when the computer restarts. NOTE: Your password settings and security settings are not changed when you restore the factory settings. 106 Chapter 5 Computer Setup - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 115
Computer Setup menu items listed in this chapter may not be supported by your computer. File menu Select System Information Set System View specification information for the processor, cache and memory size, system ROM, video revision, and keyboard controller version Windows Vista and Windows XP 107 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 116
(not restarting) the computer. Automatic DriveLock Enable/disable Automatic DriveLock support. Disk Sanitizer Run Disk Sanitizer to destroy all existing data on the primary hard drive or the drive in the upgrade bay. CAUTION: If you run Disk Sanitizer, the data on the selected drive is destroyed - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 117
components needed for starting the computer. ● Run-In Test-Runs a comprehensive check on system memory. ● Hard Disk Test-Runs a comprehensive self-test on any hard drive in the system. ● Error Log-Displays a log file if any errors have occurred. Computer Setup in Windows Vista and Windows XP 109 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 118
Configuration options may not be supported by your computer. Select Language support (enabled by default). When enabled, USB legacy support allows the following: ◦ Use of a USB keyboard in Computer Setup even when a Windows by computer model. ● Enable/disable HP QuickLook 2 (enabled by default). ● - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 119
wireless button state (enabled by default). ● Enable/disable embedded WWAN device radio (enabled by default). ● Enable/disable embedded Bluetooth (enabled by default). ● Enable/disable LAN/WLAN switching (disabled by default). ● guide may not be supported by your computer. Computer Setup in Linux 111 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 120
keyboard connected by USB can be used with Computer Setup only if USB legacy support is enabled. To start Computer Setup, follow these steps: 1. Turn on or restart the computer. 2. Before your operating system opens and while the "F10=ROM Based Setup" message Then follow the instructions on the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 121
the Computer Setup menu items listed in this chapter may not be supported by your computer. File menu Select System information Restore Defaults Ignore identification information for the computer. ● View specification information for the processor, cache and memory size, and system ROM. Replace the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 122
Security menu NOTE: Some of the menu items listed in this section may not be supported by your computer. Select Setup Password Power-On Password Password Options DriveLock Passwords System IDs Disk Sanitizer To do this Enter, change, or delete a setup password. Enter, change, or delete a power-on - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 123
Diagnostics menu Select HDD Self-Test Options Memory Check To do this Run a comprehensive self-test on any hard drive in the system or on any optional MultiBay hard drive. Run a comprehensive check on system memory. Computer Setup in Linux 115 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 124
4th boot device: Notebook hard drive ◦ 5th boot device: USB hard disk ◦ 6th boot device: Network controller ● Swap the functions of the fn key and left ctrl key. ● Enable/disable USB legacy support. When enabled, USB legacy support allows the following: ◦ Use of a USB keyboard in Computer Setup even - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 125
To do this ● Enable/disable embedded WLAN Device Radio. ● Enable/disable embedded Bluetooth Device Radio. ● Enable/disable Network Interface Controller (NIC) ● Enable/disable LAN/WLAN Switching. ● Enable/disable Wake on LAN. ● Enable/disable the integrated camera (webcam) ● Enable/disable USB port - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 126
6 Specifications Computer specifications 33.8-cm (13.3-in) models 35.6-cm (14.0- , no Bluetooth, no modem, one memory module, and optical disk drive < 2.15 kg (4.74 lbs) ● With 6-cell battery, no WWAN, no Bluetooth, no < 2.02 kg (4.45 lbs ) modem, one memory module; without optical disk drive < - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 127
thermal limits for plastic surfaces. The computer operates well within this range of temperatures. 33.8-cm (13.3-in) display specifications Dimensions Height Width Diagonal Number of colors Contrast ratio Brightness Pixel resolution Pitch Format Configuration Backlight Character display Total - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 128
mm 1280 × 800; HD: 1366 × 768 RGB vertical stripe LED 80 × 25 4.0 W ±40° horizontal, +120/-40° vertical (typical) Hard drive specifications Dimensions Height Width Weight Interface type Transfer rate Security Seek times (typical read, including setting) Single track Average Maximum Logical blocks - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 129
and exclusions apply. Contact technical support for details. DVD ROM Drive specifications Applicable disc Random access time DVD CD Cache buffer Data transfer rate CD-R (24X) CD-RW (10X) CD-ROM (24X) DVD (8X) Multiword DMA mode 2 DVD-ROM (DVD-5, DVD-9, DVD-10, DVD-18, CD-ROM (Mode 1 and - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 130
Mode Blu-ray ROM with LightScribe DVD±R/RW SuperMulti DL Drive specifications Applicable disc Read Write Random access time BD DVD CD Cache buffer Data transfer rate 24X CD-ROM 8X DVD-ROM 4X BD 24X CD-R 16X CD-RW 8X DVD+R 4X DVD+RW 8X DVD-R 4X DVD-RW 2.4X DVD+R(9) 5X DVD-RAM BD-ROM, BD-ROM-DL, BD - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 131
Applicable disc 1X BD-ROM 1X BD-R read 1X BD-RE read Transfer mode 4,500 KB/sec 4,500 KB/sec 4,500 KB/sec Multiword DMA Mode Blu-ray ROM with LightScribe DVD±R/RW SuperMulti DL Drive specifications 123 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 132
lines, and memory addresses. If two devices require the same resource and create a device conflict, you can manually change the resource following: ● Resources by type ● Resources by connection To view resource settings in Windows XP: 1. Select Start > My Computer, or double-click My Computer on the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 133
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 programs. ● Save customized settings that appear in a window, toolbar, or menu bar by taking a screen shot - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 134
. NOTE: DVDs and DVDs with double-layer (DL) support store more information than CDs, so using them for backup reduces the number of recovery discs required use Windows Startup Repair to fix problems that might prevent Windows from starting correctly. ● f11 recovery tools: You can use f11 recovery - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 135
click Disk Management. NOTE: If the HP Recovery partition is not listed, you must recover your operating system and programs using the Windows 7 Operating System Operating System DVD and the Driver Recovery disc (both purchased separately). For additional information, contact technical support by - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 136
NOTE: DVDs and DVDs with double-layer (DL) support store more information than CDs, so using them for backup reduces the number of recovery discs required 2. Follow the on-screen instructions to back up your entire computer (select models only) or your files. NOTE: Windows® includes the User Account - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 137
operating system and programs using the Windows Vista operating system DVD and the Driver Recovery disc (both purchased separately). For additional information, refer to the "Using a Windows Vista operating system DVD (purchased separately)" section in this guide. 3. Restart the computer, and then - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 138
the Driver Recovery disc (both purchased separately). For additional information, refer to the "Using a Windows Vista operating system DVD (purchased separately)" section in this guide. 3. Turn on or restart the computer, and then press esc while the "Press the ESC key for Startup Menu" message is - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 139
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 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 140
then click Next. 4. Follow the on-screen instructions. NOTE: For additional information on initiating a recovery in Windows, perform a search for this topic in Help and Support. Recovering the operating system and programs CAUTION: The recovery process reformats and completely erases the hard drive - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 141
recovery tool reinstalls the original operating system and HP programs and drivers that were installed at the factory. Software, drivers, and updates not installed by HP must be manually for recovery" message is displayed on the screen. 3. Follow the on-screen instructions. Linux backup and - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 142
8 Connector pin assignments Audio-in (microphone) Pin Signal 1 Audio signal in 2 Audio signal in 3 Ground 134 Chapter 8 Connector pin assignments - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 143
Audio-out (headphone) Pin Signal 1 Audio out, left channel 2 Audio out, right channel 3 Ground Audio-out (headphone) 135 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 144
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 136 Chapter 8 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 145
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 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 146
RJ-11 (modem) Pin Signal 1 Unused 2 Tip 3 Ring 4 Unused 5 Unused 6 Unused 138 Chapter 8 Connector pin assignments - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 147
RJ-45 (network) Pin Signal 1 Transmit + 2 Transmit - 3 Receive + 4 Unused 5 Unused 6 Receive - 7 Unused 8 Unused RJ-45 (network) 139 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 148
Universal Serial Bus Pin Signal 1 +5 VDC (4.75 V minimum under a continuous 0.5-A load) 2 Data - 3 Data + 4 Ground 140 Chapter 8 Connector pin assignments - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 149
eSATA/USB Pin Signal 1 USB +5 VDC 2 USB Data - 3 USB Data + 4 USB Ground S1 eSATA Ground S2 eSATA Transmit Data A+ S3 eSATA Transmit Data A- S4 eSATA Ground S5 eSATA Receive Data B- S6 eSATA Transmit Data B+ S7 eSATA Ground eSATA/USB 141 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 150
EN 60 320/IEC 320 Standard Sheet C13 connector for mating with the appliance inlet on the back of the computer. Requirements for specific countries and regions Country/region Australia Austria Belgium Canada Denmark Finland France Germany Italy Japan The Netherlands Norway The People's Republic of - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 151
wall plug) must bear the certification mark of the agency responsible for evaluation in the country or region where it will be used. Requirements for specific countries and regions 143 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 152
these components, handle them carefully. NOTE: Materials Disposal. This HP product contains mercury in the backlight in the display assembly that NOTE: The procedures provided in this chapter are general disassembly instructions. Specific details, such as screw sizes, quantities, and locations, - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 153
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 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 154
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 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 155
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. 15. Remove - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 156
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 backlight frame from the display panel. 18. Remove the backlight from the - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 157
22. Release the tape (4) that secures the LCD panel to the display rear panel. 23. Remove the LCD panel. 24. Recycle the LCD panel and backlight. Display 149 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 158
102, 110, 116 using 104, 112 computer specifications 118 connector, power 16 connectors, service considerations 44 cord, power 20 D device configurations 110 Diagnostics menu 109, 115 discs Driver Recovery 132 Operating System 132 Disk Sanitizer 108 diskette drive precautions 44 product description - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 159
light, identifying 14 DriveLock automatic 108 password 108 Driver Recovery disc 132 drives boot order 102, 110, 116 optical 15 preventing damage 44 Dual Core CPU 110 DVD-ROM Drive removal 57 spare part number 29, 33, 57 specifications 121 DVD±RW Double-Layer Drive with LightScribe precautions 44 - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 160
media cards 4 graphics 1 hard drives 3 keyboard 5 memory module 2 modem module 3 operating system 5 optical drives 3 panels 1 pointing devices 5 ports 4 power requirements 5 processors 1 product name 1 security 5 serviceability 8 visual 3 wireless 4 product name 1 Q QuickLook light, identifying - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 161
18 webcam light, identifying 18 Windows applications key, identifying 13 Windows Backup utility 131, 132 Windows logo key, identifying 13 Windows recovery 129, 132 Windows Vista operating system DVD 130 wireless antenna, disconnecting 62, 70 wireless antennas 19 wireless, product description 4 WLAN - HP ProBook 4420s | HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 162
HP ProBook 4320s Notebook PC
HP ProBook 4321s Notebook PC
HP ProBook 4420s Notebook PC
HP ProBook 4421s Notebook PC
Maintenance and Service Guide
SUMMARY
This guide is a troubleshooting reference used for maintaining and servicing the computer. It provides
comprehensive information on identifying computer features, components, and spare parts;
troubleshooting computer problems; and performing computer disassembly procedures.