Compaq Presario CQ42 Notebook
PC and HP G42 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.
Bluetooth is a trademark owned by its
proprietor and used by Hewlett-Packard
Company under license. Intel and
Arrandale are trademarks of Intel
Corporation in the United States 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: April 2010
Document Part Number: 594158-002
MSG revision history
RevisionPublication dateDescription
AApril 2010Edited this guide to include HP G42 Notebook PC and Compaq CQ42
Notebook PC information only.
BOctober 2010
CDecember 2010
Added newly supported memory modules to spare parts listings in
●
the following locations:
Mass storage devices on page 36, Sequential part number listing
on page 39, Memory module on page 60.
Added newly supported processors to spare parts listings in the
●
following locations:
Mass storage devices on page 36, Sequential part number listing
on page 39, Processor on page 91.
●Added newly supported system boards to spare parts listings in the
following locations: Computer major components on page 26,
Mass storage devices on page 36, Sequential part number listing
on page 39, System board on page 81.
Added newly supported processors to spare parts listings in the
●
following locations:
Mass storage devices on page 36, Sequential part number listing
on page 39, Processor on page 91.
●Added newly supported system boards to spare parts listings in the
following locations: Computer major components on page 26,
Mass storage devices on page 36, Sequential part number listing
on page 39, System board on page 81
Added newly supported power cord to spare parts listings in the
●
following locations: Miscellaneous Parts, Sequential part number
listing on page 39, Memory module on page 60.
Removed Bluetooth™ references. Bluetooth is not supported.
●
Computer major components on page 26,
Computer major components on page 26,
Computer major components on page 26,
ENWWiii
iv MSG revision historyENWW
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 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).
Index ................................................................................................................................................................. 135
xENWW
1Product description
CategoryDescriptionHP G42HP G42Compaq
DiscreteUMADiscreteUMA Models
Product
Name
HP G42 Notebook
ProcessorsIntel® Arrandale™
i7-620M, 2.66-GHz,
i5-540M, 2.53-GHz,
i5-520M, 2.4-GHz, SC
i5-430M 2.26-GHz
i3-350M, 2.26-GHz 3-
Compaq Presario
CQ42 Notebook PC
PC
SC turbo, 4-MB L3
cache
SC turbo, 3-MB L3
cache
turbo, 3-MB L3 cache
(turbo to 2.53- GHz)
3-MB L3 cache
MB L3 cache
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√√√√
Presario
CQ42
Compaq
Presario
CQ42
150-199
Compaq
Presario
CQ42
UMA Models
100-149
i3-330M, 2.13-GHz 3-
MB L3 cache
Intel Pentium™
DC T4400, 2.2-GHz,
800-MHz FSB, 1-MB
L2 cache
DC T4300, 2.1-GHz,
800-MHz FSB, 1-MB
L2 cache
Intel Celeron™
DC T3100, 1.9-GHz,
800-MHz FSB, 1-MB
L2 cache
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√
√
√
ENWW1
CategoryDescriptionHP G42HP G42Compaq
Presario
CQ42
Compaq
Presario
CQ42
Compaq
Presario
CQ42
DiscreteUMADiscreteUMA Models
150-199
DC T3000, 1.8-GHz
800-MHz FSB, 1-MB
L2 cache
AMD® Phenom™ II
Processor
N620 DDR3-1333 (2
MB 2.8 GHz L2
cache) 35W
DC N640 DC (2.9
GHz 35W)
N660 3.0 GHz 2M√√√√
DC N830 Tri-core 2.1
GHz 1.5M L2 35W
DC N850 2.2 GHz L2
cache
N870 2.3 GHz 1.5 MB√√√√
DC N930 QC 2.0 GHz√√√√
N970 2.2 GHz 2 MB√√√√
√
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√√√√
UMA Models
100-149
P650 2.6 GHz 2MB
35W
DC P820 Tri-Core 1.8
GHz 1.5 MB L2 cache
25W
DC P840 1.9 GHz L2
cache
P860 2 GHz 1.5 MB
25W
DC QC P920 1.6 GHz
2M L2 cache 25W
DC P940 DC QC 1.7
GHz L2 cache
DC P950 QC 2.1 GHz
L2 cache 35W
P960 1.8 GHz 2 MB
25W
AMD Turion™ II
Processor
N570 2.7 GHz 2M
35W
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DC P540 DC 2.4 GHz
L2 cache 25W
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2Chapter 1 Product descriptionENWW
CategoryDescriptionHP G42HP G42Compaq
Presario
CQ42
Compaq
Presario
CQ42
Compaq
Presario
CQ42
DiscreteUMADiscreteUMA Models
150-199
DC N550 DC 2.6 GHz
L2 cache 35W
DC N530 DC 2.5GHz
L2 cache 35W
P560 2.5Ghz 2M 35W√√√√
P520 DDR3-1066
MHz
P650 2.6 GHz 2 MB
25W
AMD Athlon™ II
Processor
DC P340 2.2 GHz L2
cache 25W
P360 2.5 GHz 35W√√√√
DC N330 2.3 GHz 1M
L2 cache 35W
DC N350 2.4 GHz L2
cache 35W
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UMA Models
100-149
N370 2.5 GHz 1 MB
35W
DC N530 DC 2.5 GHz
L2 cache 35W
P320 DDR3-1066
MHz
PROC DC V140 SC
2.3 GHz 25W
Champlain SC
processor V160 2.4
GHz 25W
Champlain V120
512K L2 cache
AMD Sempron™ II
Processor
N120 DDR3-1066
Mhz
ChipsetIntel® HM55 Express√√√√
Intel® GL40√
Southbridge: ICH9m√
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AMD
ENWW3
CategoryDescriptionHP G42HP G42Compaq
Presario
CQ42
Compaq
Presario
CQ42
Compaq
Presario
CQ42
DiscreteUMADiscreteUMA Models
150-199
ATI RS880M
ATI RS880MD
Southbridge - SB820√√√√
GraphicsIntel UMA
(Northbridge)
(Northbridge)
(integrated)/HD
Graphics with shared
video memory
(memory size is
dynamic change):
Up to 251 MB on
●
computers with
1024 MB of
system memory
●Up to 358 MB on
computers with
more than 2048
MB of system
memory
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√
√√
UMA Models
100-149
4Chapter 1 Product descriptionENWW
CategoryDescriptionHP G42HP G42Compaq
Presario
CQ42
Compaq
Presario
CQ42
Compaq
Presario
CQ42
Intel UMA
(integrated)/GMA
4500M - GL40
chipset with shared
video memory
(memory size is
dynamic change):
●Up to 1759 MB
for computers
with more than
4096 MB of
system memory
(64 bit)
●Up to 1309 MB
for computers
with more than
4096 MB of
system memory
(32 bit)
Up to 1309 MB
●
for computers
with more than
3072 MB of
system memory
DiscreteUMADiscreteUMA Models
150-199
√
UMA Models
100-149
Up to 797 MB for
●
computers with
more than 2048
MB system
memory
Up to 285 MB for
●
computers with
more than 1024
MB of system
memory
ATi Discrete PCI
Express x 16
Graphics
ATi Mobility
●
Radeon Park-LP
S3 package (ATI
Mobility
Radeon™
HD5430 with
512-MB of
dedicated video
memory (64MB×16 DDR3, 4
pcs, 800-MHz))
√
ENWW5
CategoryDescriptionHP G42HP G42Compaq
Presario
CQ42
Compaq
Presario
CQ42
Compaq
Presario
CQ42
Switchable Discrete
Support for BD or
Graphics
ATi Robson XT
●
(ATI Mobility
Radeon™
HD6370) with
512MB of
dedicated
memory
(64Mx16 DDR3
800 MHz x 4
PCs)
ATi Robson XT
●
(ATI Mobility
Radeon™
HD6370) with
1GB of
dedicated
memory
(128Mx16 DDR3
800 MHz x 4
PCs)
HD-DVD playback
with HD decoder
and DX10 support
DiscreteUMADiscreteUMA Models
150-199
√√
√√√√√
UMA Models
100-149
Panel35.6-cm (14.0-in) HD
LED BrightView
(1366 x 768)
16:9 wide aspect ratio√√√√√
Memory2 SODIMM slots√√√√√
Customer-accessible
and upgradable
Supports up to 8 GB
of system memory
DDR3, 1066-MHz,
dual-channel memory
(DDR3 1333 MHz can
be downgraded to
DDR3 1066 MHz)
DDR3, 800-MHz,
dual-channel memory
(DDR3 1333 MHz can
be downgraded to
DDR3 800 MHz)
Supports the following
configurations:
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6Chapter 1 Product descriptionENWW
CategoryDescriptionHP G42HP G42Compaq
Presario
CQ42
Compaq
Presario
CQ42
Compaq
Presario
CQ42
DiscreteUMADiscreteUMA Models
150-199
●4096 MB (2048
MB × 2)
●3072 MB (1024
MB × 1 + 2048
MB × 1)
●2048 MB (2048
MB × 1)
●2048 MB (1024
MB × 2)
●1024 MB (1024
MB × 1)
Hard drivesSupports 9.5-mm,
6.35-cm (2.5-in) hard
drive
Serial ATA√√√√√
Supports the following
drives:
●750 GB, 5400
rpm
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UMA Models
100-149
●640 GB, 5400
●500 GB, 7200
●320 GB, 7200
●250 GB, 7200
●160 GB, 7200
Optical
drives
SATA√√√√√
12.7-mm (0.50-in)
Supports the following
●Blu-ray ROM
rpm
rpm
rpm
rpm
rpm
Fixed (removal of one
screw required)
fixed tray load
drives:
with LightScribe
DVD±R/RW
SuperMulti DL
Drive
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ENWW7
CategoryDescriptionHP G42HP G42Compaq
Presario
CQ42
Compaq
Presario
CQ42
Compaq
Presario
CQ42
DiscreteUMADiscreteUMA Models
150-199
●Blu-ray ROM
●DVD±R/RW
Diskette
drive
CameraVGA camera√√√√√
Fixed (no tilt)√√√√√
640 × 480 by 24
MicrophoneOne microphone,
AudioHD audio√√√√√
DVD±R/RW
SuperMulti DL
Drive
DVD±R/RW
●
SuperMulti DL
Drive with
LightScribe
SuperMulti DL
Drive
Supports external
USB drive only
frames per second
analog
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UMA Models
100-149
Supports Microsoft
Premium
requirements
Altec Lansing
Modem
(select
models only)
EthernetIntegrated 10/100
WirelessIntegrated wireless
Intel Centrino
Intel Centrino
speakers
Support for optional
high-speed 56k
modem
network interface card
(NIC)
local area network
(WLAN) options by
way of wireless
module:
Wireless-N 1000
802.11b/g 1x2
Wireless-N 1000
802.11b/g 1x2
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8Chapter 1 Product descriptionENWW
CategoryDescriptionHP G42HP G42Compaq
Presario
CQ42
Compaq
Presario
CQ42
Compaq
Presario
CQ42
Atheros AR9285
Atheros AR9285
Broadcom 4312G
Broadcom 4312G
Realtek RTL8191SE
Realtek RTL8191SE
External
media card
(select
models only )
802.11b/g/n 1x1 WiFi
Adapter
802.11b/g/n 1x1 WiFi
Adapter
802.11b/g WiFi
Adapter
802.11b/g WiFi
Adapter
802.11b/g/n 1x1 WiFi
Adapter
802.11b/g/n 1x1 WiFi
Adapter
5-in-1 Digital Media
Slot; supports SD,
MMC, MS, Mspro, xD
DiscreteUMADiscreteUMA Models
150-199
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√
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UMA Models
100-149
Single port configured
as either HDMI or 5in-1 Digital Media Slot
Supports mini
versions of SD, MMC,
and MS Duo with
adapter (adapter not
included)
PortsVGA (Dsub 15-pin)
supporting 1600 x
1200 resolution at 75
Hz; disabled when
connected to devices
through Expansion
port 3
Hot plug/unplug and
auto detect for wideaspect or standardaspect video
HDMI v1.3 supporting
1080p with HDCP key
Single port configured
for either HDMI or 5in-1 card reader
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USB 2.0 (3)√√√√√
ENWW9
CategoryDescriptionHP G42HP G42Compaq
Presario
CQ42
Compaq
Presario
CQ42
Compaq
Presario
CQ42
RJ-11 (modem) with
RJ-45 (Ethernet, with
Audio-in (mono
Audio-out (stereo
Smart-pin AC adapter
Keyboard/
pointing
devices
TouchPad with 2
Power
requirement
s
modem option
link and activity lights)
microphone)
headphone)
plug
14.0-inch keyboard√√√√√
buttons and 2-way
scroll (taps enabled
as default)
6-cell (47-Wh) 2.20Ah Li-ion battery
DiscreteUMADiscreteUMA Models
150-199
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UMA Models
100-149
65-W AC adapter with
90-W AC adapter with
SecuritySecurity cable slot√√√√√
Operating
system
Windows 7
Windows 7 Home
Windows 7 Home
Free DOS√√√
ServiceabilityEnd-user
AC adapter√√√√√
Battery (system) √√√√√
Smart-Pin DC
connector
Smart-Pin DC
connector
Preinstalled:
Professional (32 & 64
bit)
Premium (32 & 64 bit)
Basic (32 & 64 bit)
replaceable parts:
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√
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Hard drive√√√√√
10Chapter 1 Product descriptionENWW
CategoryDescriptionHP G42HP G42Compaq
Presario
CQ42
Compaq
Presario
CQ42
Compaq
Presario
CQ42
DiscreteUMADiscreteUMA Models
150-199
Memory module √√√√√
Optical drive√√√√√
Mini-card device √√√√√
UMA Models
100-149
ENWW11
12Chapter 1 Product descriptionENWW
2External component identification
Identifying the hardware
Components included with the computer may vary by region and model. The illustrations in this
chapter identify the standard features on most computer models.
To see a list of hardware installed in the computer, follow these steps:
1.Select Start > My Computer.
2.In the left pane of the System Tasks window, select View system information.
3.Select Hardware tab > Device Manager.
You can also add hardware or modify computer configurations using Device Manager.
ENWWIdentifying the hardware13
Top components
TouchPad
ComponentDescription
(1)
(2)TouchPad zoneMoves the pointer and selects or activates items on the
(3)Left TouchPad buttonFunctions like the left button on an external mouse.
(4)Right TouchPad buttonFunctions like the right button on an external mouse.
TouchPad off indicatorTo switch the TouchPad zone on and off, quickly double-tap
the TouchPad off indicator.
NOTE: When the TouchPad zone is active, the light is off.
screen.
There is an unmarked scroll zone inside the right edge of the TouchPad. To scroll up and down using
the TouchPad vertical scroll zone, slide your finger up or down inside the right edge of the TouchPad.
For more information about TouchPad features, refer to” Using the TouchPad” section later in this
guide.
14Chapter 2 External component identificationENWW
Lights
ComponentDescription
(1) TouchPad light
(2)Caps lock lightOn: Caps lock is on.
(3)
(4)
Power light
Wireless light
On: The TouchPad is disabled.
●
●Off: The TouchPad is enabled.
On: The computer is on.
●
●Blinking: The computer is in the Sleep state.
●Off: The computer is off or in Hibernation.
White: An integrated wireless device, such as a
●
wireless local area network (WLAN) device, is on.
Amber: All wireless devices are off.
●
ENWWTop components15
Button and speakers
ComponentDescription
(1)Speakers (2)Produce sound.
(2) Power button
When the computer is off, press the button to turn on the
●
computer.
●When the computer is on, press the button briefly to
initiate Sleep.
When the computer is in the Sleep state, briefly press
●
the button to exit Sleep.
When the computer is in Hibernation, briefly 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 5 seconds to turn off the computer.
To learn more about your power settings, select Start >
Control Panel > System and Security > Power Options.
16Chapter 2 External component identificationENWW
Keys
ComponentDescription
(1)esc keyDisplays system information when pressed in combination with
(2)fn keyDisplays system information when pressed in combination with
(3)
(4)
(5)Navigation keysNavigate using the Up, Down, Left and Right arrow keys.
(6)Action keysExecute frequently used system actions.
Windows logo keyDisplays the Windows Start menu.
Windows applications keyDisplays a shortcut menu for items beneath the pointer.
the fn key.
the esc key.
ENWWTop components17
Display
ComponentDescription
(1)Internal microphoneRecords sound.
(2)Integrated webcam (select models only)Records audio and video and captures still photographs.
(3)Integrated webcam light (select models only)On: The integrated webcam is in use.
18Chapter 2 External component identificationENWW
Right-side components
ComponentDescription
(1)Optical driveReads and writes to optical discs.
(2)Optical drive lightBlinking: The optical drive is being accessed.
(3)
(4)RJ-11 (modem) jack (select models only)Connects a modem cable.
(5)AC adapter/power/battery light
(6)
(7)
USB portConnects an optional USB device.
White: The computer is connected to external power and
●
the battery is fully charged.
●Blinking white: The computer is in the Sleep state.
Amber: A battery is charging.
●
Power connectorConnects an AC adapter.
Security cable slotAttaches an optional security cable to the computer.
NOTE: The security cable is designed to act as a deterrent,
but it may not prevent the computer from being mishandled or
stolen.
ENWWRight-side components19
Left-side components
ComponentDescription
(1)
(2)VentEnables airflow to cool internal components.
(3)HDMI port (select models only)Connects an optional video or audio device, such as a high-
(4)
(5)
(6)
(7)
(8)Digital Media Slot (select models only)Supports the following optional digital card formats:
External monitor portConnects an external VGA monitor or projector.
NOTE: The computer fan starts up automatically to cool
internal components and prevent overheating. It is normal for
the internal fan to cycle on and off during routine operation.
definition television, or any compatible digital or audio
component.
RJ-45 (network) jackConnects a network cable.
USB ports (2)Connects optional USB devices.
Audio-in (microphone) jackConnects an optional computer headset microphone, stereo
array microphone, or monaural microphone.
Audio-out (headphone) jackProduces sound when connected to optional powered stereo
speakers, headphones, earbuds, a headset, or television
audio.
Memory Stick (MS)
●
Memory Stick Pro (MSP)
●
●MultiMediaCard (MMC)
●Secure Digital (SD) Memory Card
xD-Picture Card (XD)
●
(9)
Drive lightOn: The hard drive is in use.
20Chapter 2 External component identificationENWW
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