HP Pavilion DV4-2155 Manual

December 17, 2009December 17, 2009
HP Pavilion dv4 Entertainment PC
Maintenance and Service Guide
Document Part Number: 598157-001
December 2009
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.

© Copyright 2009 Hewlett-Packard Development Company, L.P.
ATI and ATI Mobility Radeon are trademarks of Advanced Micro Devices, Inc. Bluetooth is a trademark owned by its proprietor and
used by Hewlett-Packard Company under license. Intel, Arrandale, and Core are trademarks of Intel corporation in the U.S. and other
countries. Microsoft and Windows are U.S. registered trademarks of Microsoft Corporation. SD Logo is a trademark of its proprietor.
The information contained herein is subject 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 or omissions contained herein.
First Edition: December 2009
Document Part Number: 598157-001

Safety warning notice
ÅWARNING: 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 optional printer, or a soft surface, such as pillows or rugs or clothing, to block airflow. Also, do not allow
the AC adapter to contact the skin or a soft surface, such as pillows or rugs or clothing, during operation. The computer and the
AC adapter comply with the user-accessible surface temperature limits defined by the International Standard for Safety of
Information Technology Equipment (IEC 60950).

Maintenance and Service Guide iv
Contents
1 Product description
2 External component identification
Top components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
TouchPad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Buttons, speakers, and fingerprint reader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
Front components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–6
Rear component . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–7
Right-side components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8
Left-side components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–9
Bottom components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–10
Wireless antennas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–11
Additional hardware components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12
3 Illustrated parts catalog
Service tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
Computer major components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
Display assembly subcomponents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–9
Plastics Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–10
Mass storage devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–11
Miscellaneous parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–12
Sequential part number listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–14

vMaintenance and Service Guide
Contents
4 Removal and replacement procedures
Preliminary replacement requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
Tools required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
Service considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
Plastic parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
Grounding guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
Component replacement procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–5
Service tag. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–5
Computer feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–6
Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–7
Hard drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–8
Memory module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–10
RTC battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–12
TV tuner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–14
WLAN module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–15
Optical drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–19
Keyboard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–20
Keyboard cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–23
Power button board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–25
Speaker assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–26
Display assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–27
Webcam/microphone module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–33
Top cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–34
Touchpad button board and bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–37
Fingerprint Reader board (select models only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–39
Modem module (select models only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–40
Bluetooth module (select models only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–42
Audio board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–44
USB board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–46
Power connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–48
System board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–50
RJ-11 connector (select models only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–53
Heat sink assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–55
Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–57
Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–59

Contents
Maintenance and Service Guide vi
5 Setup Utility
Starting Setup Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
Using Setup Utility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
Changing the language of Setup Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
Navigating and selecting in Setup Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
Displaying system information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
Restoring default settings in Setup Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
Exiting Setup Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
Setup Utility menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
Main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
Security menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
System Configuration menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4
Diagnostics menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–4
6 Specifications
Computer specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
14.1-inch WXGA BrightView display specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
Hard drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–3
Blu-ray DVD±R/RW SuperMulti Double-Layer Drive with LightScribe specifications . . . . . . . . . . . . . . 6–4
DVD±RW SuperMulti Double-Layer Combo Drive with LightScribe specifications . . . . . . . . . . . . . . . . 6–5
System DMA specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6
System interrupt specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–7
System I/O address specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–8
7 Backup and recovery
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1
Creating recovery discs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–2
Backing up your information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–3
Using Windows Backup and Restore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–4
Using system restore points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–4
Performing a recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–5
Recovering from the recovery discs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–6
Recovering from the dedicated recovery partition (select models only) . . . . . . . . . . . . . . . . . . . . . . . 7–6

vii Maintenance and Service Guide
Contents
8 Connector pin assignments
Audio-in (microphone). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–1
External monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–2
HDMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–3
RJ-11 (modem) (select models only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–4
RJ-45 (network) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–5
Universal Serial Bus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–6
9 Power cord set requirements
Requirements for all countries and regions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–1
Requirements for specific countries and regions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–2
10Recycling
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10–1
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10–1
Index

Maintenance and Service Guide 1–1
1
Product description
Category Description
Product Name HP Pavilion dv4 Entertainment PC
Processors Intel Arrandale™ Single-Core i5-520M (2.4 GHz, 3 MB L3 cache, 1066 MHZ SC Turbo)
Intel Arrandale Single-Core i5-540M (2.53 GHz, 3 MB L3 cache, 1066 MHZ SC Turbo)
Chipset Intel™ HM55
Graphics Mobile Intel™ GMA Media Accelerator HD unified memory architecture (UMA, integrated) with
shared video memory:
■Up to 268 MB of video memory on computer models equipped with 1 GB of main system
memory.
■Up to 781 MB of video memory on computer models equipped with 2 GB of main system
memory.
■Up to 1292 MB of video memory on computer models equipped with 3GB of main system
memory.
■Up to 1293 MB of video memory on computer models equipped with 4GB of main system
memory (32-bit OS).
■Up to 1759 MB of video memory on computer models equipped with 4GB of main system
memory (64-bit OS).
ATI Discrete Mobility Radeon™ HD4550 with 512 MB dedicated video memory
Panel 14.1-in WXGA BrightView (1280 × 800) display panel
16:10 wide aspect ratio
(Continued)

1–2 Maintenance and Service Guide
Product description
Memory 2 customer-accessible/upgradable memory module slots
Supports dual-channel memory
Supports up to 8 GB of system RAM
1066-MHz, DDR3
Supports the following configurations:
8192 MB total system memory (4096 × 2, dual-channel)
6144 MB total system memory (4096 + 2048)
4096 MB total system memory (2048 × 2, dual-channel)
3072 MB total system memory (2048 + 1024)
2048 MB total system memory (1024 × 2, dual-channel)
2048 MB total system memory (2048 × 1)
1024 MB total system memory (1024 × 1)
Hard Drives Supports a 9.50-mm, 6.35-cm (2.50-in) hard drive
Supports HP ProtectSmart Hard Drive Protection
Customer-accessible
Serial ATA
Supports the following hard drives:
500 GB, 7200-rpm
320 GB, 7200-rpm
250 GB, 7200-rpm
160 GB, 7200-rpm
Optical drives 12.7-mm tray load
S e r i a l ATA ( S ATA )
MultiBay weight saver
Customer-accessible
Supports the following drives:
Blu-ray ROM DVD±R/RW SuperMulti DL Drive with LightScribe
DVD±R/RW SuperMulti DL Drive with LightScribe
Audio High-definition audio
Meets SRS logo requirement
Supports Microsoft® premium requirements
Pavilion-branded Altec Lansing speakers
Modem 56K MDC V.92 data/fax modem (select models only)
(Continued)
Category Description

Product description
Maintenance and Service Guide 1–3
Webcam/microphone VGA webcam
Fixed (no tilt)
Activity LED
640 × 480 by 24 frames per second
2 integrated omnidirectional digital microphones
Ethernet Integrated 10/100/1000 network interface card (NIC) for Discrete versions.
Integrated 10/100 network interface card (NIC) for UMA versions.
Wireless Integrated WLAN options by way of wireless module:
Intel WiFi Link 6200 802.11 a/b/g/n WLAN module
Intel WiFi Link 6200 802.11 a/b/g/n WLAN module + Bluetooth
IIntel WiFi Link 1000 802.11b/g/n WLAN module
Intel WiFi Link 1000 802.11 b/g/n WLAN module + Bluetooth
2 wireless antennas built into display assembly
Broadcom BCM2070 Bluetooth® 2.1 module (select models only)
External media cards One ExpressCard slot, supporting optional ExpressCard/54 cards
Digital Media Slot supporting Memory Stick (MS), Memory Stick Pro (MSP), MultiMediaCard
(MMC), Secure Digital (SD) Memory Card, and xD-Picture Card (XD).
Adapter (purchased separately) provides support for mini versions of SD, MMC, and MSP Duo
Ports Audio-in (stereo microphone)
Audio-out (stereo headphone)
RJ-11 modem (select models only)
HDMI v. 1.3b supporting 1080p with HDCP key
HP Smart Adapter power
Consumer infrared
eSATA (third USB port)
RJ-45 (Ethernet, includes link and activity lights)
USB 2.0
VGA (Dsub 15-pin) supports the following resolutions:
1920 × 1200 external resolution at 60 GHz (select models only)
1600 × 1200 external resolution at 75 GHz (select models only)
Hot plug/unplug with auto-detect
(Continued)
Category Description

1–4 Maintenance and Service Guide
Product description
Docking Expansion port 3 supports HP xb Docking Station and HP Notebook QuickDock
Keyboard/pointing
devices
14.1-in keyboard
TouchPad with 2 buttons
Supports 2-way scroll
Taps enabled as default
Power requirements 65-W and 90-W HP Smart Adapter with localized cable plug support (3-wire plug with ground
pin, supports 3-pin DC connector)
Smart pin AC Adapter with localized cable plug support
Battery options:
3-cell, 4.40 Ah (47 Wh) Li-ion battery
6-cell, 2.20 Ah (47 Wh) Li-ion battery
6-cell, 2.20 Ah (55 Wh) Li-ion battery
6-cell, 2.55 Ah (55 Wh) Li-ion battery
12-cell, 2.20 Ah (95 Wh) Li-ion battery
Security Kensington Security Lock
Fingerprint Reader with Digital Persona Software Support (select models only)
Operating system Preinstalled:
Windows®7 Professional (32 and 64-bit OS)
Windows 7 Premium (32 and 64-bit OS)
Windows 7 Basic (32-bit OS)
Serviceability End-user replaceable parts:
AC adapter
Battery (system)
Hard Drive
Memory modules
MiniCard components
RTC battery
Optical drive
Category Description

Maintenance and Service Guide 2–1
2
External component identification
Top components
TouchPad
To view or change the pointing device preferences:
1. Select Start > Devices and Printers.
2. Right-click the device representing your computer.
3. Select Mouse settings.
Item Component Description
1TouchPad light White—TouchPad is enabled.
Amber—TouchPad is disabled.
2TouchPad* Moves the pointer and selects or activates items on the screen.
3Left TouchPad button* Functions like the left button on an external mouse.
4TouchPad On/Off button Enables/disables the TouchPad.
5TouchPad vertical scroll zone Scrolls up or down.
6Right TouchPad button* Functions like the right button on an external mouse.
*This table describes factory settings.

2–2 Maintenance and Service Guide
External component identification
Lights
Item Component Description
1Power lights (2)* On—The computer is on.
Flashing—The computer is in Sleep.
Off—The computer is off or in Hibernation.
2Battery light On—The battery is charging.
Flashing—The battery reaches a low battery level or a critical battery level.
Off—If the computer is connected to an external power source, the light is off
when all batteries in the computer are fully charged. If the computer is not
connected to an external power source, the light is off until the battery
reaches a low battery level.
3Drive light Flashing—The hard drive or the optical drive is being accessed.
On—HP ProtectSmart Hard Drive Protection has temporarily parked the
internal hard drive, and if present, the hard drive in the SmartBay.
4Caps lock light On—The caps lock is on.
5Volume Mute light White—The computer sound is on.
Amber—The computer sound is off.
6Volume Down light On—Decreases speaker volume.
7Volume Up light On—Increases speaker volume.
8Num lock light On—The num lock is on or the embedded numeric keypad is enabled.
9Wireless light Blue—An integrated wireless device, such as a wireless local area network
(WLAN) device and/or a Bluetooth® device, is on.
Amber—No wireless devices are detected.
*The two Power lights display the same information. The light on the Power button is visible only when the computer is open.
The Power light on the front of the computer is visible whether the computer is open or closed.

External component identification
Maintenance and Service Guide 2–3
Buttons, speakers, and fingerprint reader
Item Component Description
1Speakers (2) Produce sound.
2Power button* When the computer is off, press the button to turn on the computer.
When the computer is on, press the button to initiate Sleep.
When the computer is in Sleep, press the button to exit Sleep.
When the computer is in Hibernation, press the button to exit Hibernation.
If the computer has stopped responding and Windows shutdown procedures
are ineffective, press and hold the Power button for at least five seconds to
shut down the computer.
To learn more about power settings, select Start > Control Panel > System
and Security > Power Options.
3Volume Mute button Mutes and restores speaker sound.
4Volume Scroll zone Adjusts speaker volume. To decrease volume, slide your finger to the left or
tap the minus sign on the scroll zone. To increase volume, slide your finger to
the right or tap the plus sign on the scroll zone.
5Wireless button Turns the wireless feature on or off but does not create a wireless
connection.
✎A wireless network must be set up in order to establish a wireless
connection.
6Fingerprint Reader 
(select models only)
Allows a fingerprint logon to Windows, instead of a password logon.
*This table describes factory settings. For information about changing factory settings, see the user guides located in Help and
Support.

2–4 Maintenance and Service Guide
External component identification
Keys
Item Component Description
1esc key Displays system information when pressed at the same time as the fn key.
2fn key Executes frequently used system functions when pressed at the same time as
a function key or the esc key.
3Windows Logo key Displays the Windows Start menu.
4Windows Applications key Displays a shortcut menu for items beneath the pointer.
5Embedded numeric keypad keys Used like the keys on an external numeric keypad.
6Function keys Executes frequently used system functions when pressed at the same time as
the fn key.

External component identification
Maintenance and Service Guide 2–5
Display
Item Component Description
1Internal display switch Turns off the display if the display is closed while the computer is on.
2Internal digital dual-array
microphones (2)
Records sound.
3Webcam light On—The webcam is in use.
4Webcam Records video and captures still photographs.

2–6 Maintenance and Service Guide
External component identification
Front components
Item Component Description
1Power light On—The computer is on.
Flashing—The computer is in Sleep.
Off—The computer is off or in Hibernation.
2Battery light On—The battery is charging.
Flashing—The battery reaches a low battery level or a critical battery level.
Off—If the computer is connected to an external power source, the light is off
when all batteries in the computer are fully charged. If the computer is not
connected to an external power source, the light is off until the battery
reaches a low battery level.
3Drive light Flashing—The hard drive or the optical drive is being accessed.
On—The HP ProtectSmart Hard Drive Protection has temporarily parked the
internal hard drive, and if present, the hard drive in the SmartBay.
4Consumer infrared lens Receives a signal from the HP Remote Control.
5Audio-in (microphone) jack Connects an optional computer headset microphone, stereo array
microphone, or monaural microphone.
6Audio-out (headphone) jacks (2) Produces sound when connected to optional powered stereo speakers,
headphones, ear buds, headsets, or television audio.

External component identification
Maintenance and Service Guide 2–7
Rear component
Component Description
Vent Enables airflow to cool internal components.
✎The computer fan starts automatically to cool internal components and
prevent overheating. It is normal for the internal fan to cycle on and off
during routine operation.

2–8 Maintenance and Service Guide
External component identification
Right-side components
Item Component Description
1SmartBay Supports an optical drive or hard drive.
2USB ports (2) Connects optional USB devices.
3RJ-11 (modem) jack 
(select models only)
Connects a modem cable.
4Power connector Connects an AC adapter.

External component identification
Maintenance and Service Guide 2–9
Left-side components
Item Component Description
1Security Cable slot Attaches an optional security cable to the computer.
✎The security cable is designed to act as a deterrent, but it might not
prevent the computer from being mishandled or stolen.
2External Monitor port Connects an external VGA monitor or projector.
3Expansion port 3 Connects the computer to an optional docking device or optional expansion
product.
✎The computer has only one expansion port. The term expansion port 3
describes the type of expansion port.
4RJ-45 (network) jack Connects a network cable.
5HDMI port Connects an optional video or audio device, such as a high-definition
television, or any compatible digital or audio component.
6eSATA/USB port Connects high-performance eSATA components, such as an eSATA external
hard drive, or connects an optional USB device.
7Digital Media Slot light On—Accessing a digital card.
8Digital Media Slot Supports the following optional digital card formats:
Memory Stick (MS)
Memory Stick Pro (MSP)
MultiMediaCard (MMC)
Secure Digital (SD) Memory Card
xD-Picture Card (XD)
9ExpressCard slot Supports optional ExpressCard/54 cards.