Dell™ Vostro™ 1720 Service Manual Working on Your Computer
Adding and Replacing Parts
Specifications
Diagnostics
System Setup
Notes, Cautions, and Warnings
NOTE: A NOTE indicates important information that helps you make better use of your computer.
CAUTION: A CAUTION indicates potential damage to hardware or loss of data if instructions are not followed.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
If you purchased a Dell™ n Series computer, any references in this document to Microsoft® Windows® operating systems are not applicable.
Information in this document is subject to change without notice.
© 2009 Dell Inc. All rights reserved.
Reproduction of this material in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.
Trademarks used in this text: Dell, the DELL logo, Vostro, TravelLite, Wi-Fi Catcher, and ExpressCharge, are trademarks of Dell Inc.; Intel, Pentium, Celeron a n d Core are registered
trademarks of Intel Corporation; Bluetooth is a registered trademark owned by Bluetooth SIG, Inc. and is used by Dell under license; TouchStrip is a trademark of Zvetco Biometrics,
LLC; Blu-ray Disc is a trademark of the Blu-ray Disc Association; Microsoft, Windows, Windows Vista, and the Windows Vista start button are either trademarks or registered
trademarks of Microsoft Corporation in the United States and/or other countries.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Inc. disclaims any
proprietary interest in trademarks and trade names other than its own.
May 2009 Rev. A00
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System Setup
Dell™ Vostro™ 1720 Service Manual Entering System Setup
<F12> Menu
Entering System Setup
Press <F2> to enter System Setup and make changes to the user-definable settings. If you are having trouble entering Setup using this key, reboot and press
the <F2> key when the keyboard LEDs first flash.
<F12> Menu
Press <F12> when the Dell logo appears to initiate a one-time boot menu with a list of the valid boot devices for the computer. The devices listed on the boot
menu depend on the bootable devices installed in the computer.
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Internal HDD
CD/DVD/CD-RW Drive
Onboard NIC
BIOS Setup
Diagnostics (starts the Pre-boot System Assessment (PSA) diagnostics)
This menu is useful when attempting to boot to a particular device or to bring up the diagnostics for the computer. Using the boot menu does not make any
changes to the boot order stored in the BIOS.
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Diagnostics
Dell™ Vostro™ 1720 Service Manual Device Status Lights
LED Error Codes
Power Button Light Codes
Device Status Lights
1—Turns on when your computer reads or writes data to the hard drive.
NOTE: To avoid loss of data, never turn off your computer while the Hard Drive light is flashing.
2—Turns on when wireless networking is enabled.
3—Turns on when a card with Bluetooth® wireless technology is enabled.
NOTE: The card with Bluetooth wireless technology is an optional feature, so the light turns on only if
you ordered the card with your computer. For more information, see the documentation that came
with your card.
To turn off only the Bluetooth wireless technology functionality, right-click the icon in the system tray
and click Disable Bluetooth Radio.
4—Turns on when the numeric keypad is enabled.
5—Turns on when the uppercase letter function is enabled.
6—Turns on when the scroll lock function is enabled.
Device status lights located in the center of the
hinge cover.
If your computer is connected to an electrical outlet, the
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If your computer is running on a battery, the
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light operates as follows:
Solid blue—The battery is charging.
Flashing blue—The battery is almost fully charged.
light operates as follows:
Off—The battery is adequately charged, or the computer is turned off.
Flashing orange—The battery charge is low.
Solid orange—The battery charge is critically low.
LED Error Codes
If your computer does not perform a Power-On Self-Test upon boot up, there are various things to look for:
1.
2.
3.
Check that the computer power light is on.
If the power light is not on, ensure that your computer is plugged into AC power. Remove the battery.
If your computer is powered on but is not performing a POST, check to see whether or not the keyboard status lights flash to indicate a successful POST
but no video or if the keyboard status lights are lit in a sequence indicating a system problem.
The following table shows the possible LED codes that may display in a no-POST situation.
Appearance
Description
ON-FLASH-FLASH
Next Step
1.
2.
4.
Install supported memory modules.
If memory is already present, reseat the module(s) one at
time in each slot.
Try known good memory from another computer or replace the
memory.
Replace the system board.
System board error
1.
2.
3.
Reseat the processor.
Replace the system board.
Replace the processor.
LCD Panel Error
1.
2.
3.
Reseat the LCD cable.
Replace the LCD panel.
Replace the video card / system board.
1.
Install compatible memory modules.
No SODIMMs are installed
3.
FLASH-ON-ON
FLASH-ON-FLASH
OFF-FLASH-OFF
2.
Memory compatability error
3.
4.
ON-FLASH-ON
1.
2.
Memory is detected but has
errors
If two modules are installed remove one and test. Try the
other module in the same slot and test. Test the other slot
with both modules.
Replace the memory.
Replace the system board.
3.
4.
Reseat the memory.
If two modules are installed remove one and test. Try the
other module in the same slot and test. Test the other slot
with both modules.
Replace the memory
Replace the system board.
1.
2.
3.
Reseat the modem.
Replace the modem.
Replace the system board.
1.
Replace the system board.
1.
2.
3.
Reseat the device.
Replace the device.
Replace the system board.
1.
2.
3.
4.
Reseat the hard drive and optical drive.
Test the computer with just the hard drive and just the optical
drive.
Replace the device that is causing the failure.
Replace the system board.
1.
Replace the system board.
OFF-FLASH-FLASH
Modem Error
FLASH-FLASH-FLASH
System board error
FLASH-FLASH-OFF
Option ROM Error
OFF-ON-OFF
Storage device error
FLASH-FLASH-ON
Video card error
Power Button Light Codes
The power LED located in the power button on the front of the computer illuminates and blinks or remains solid to indicate five different states:
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No light—System is in the off state (S5, or mechanical (AC power not applied) OFF).
Solid Amber—System fault, but power supply is good—normal operating state (S0).
Blinking Amber—System fault error condition including Power Supply (only +5VSB working), Vreg failure, missing or bad CPU.
Blinking Green—System is in power saving states S1, S3 or S4. (Blink rate is 1Hz). No fault/error condition.
Solid Green—System is fully functional and is in S0 (ON) state.
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Adding and Replacing Parts
Dell™ Vostro™ 1720 Service Manual Battery
Coin-Cell Battery
Access Panel
Optical Drive
Hard Drive
Wireless Local Area Network (WLAN) Card
Memory
Fan
Heat Sink and Processor
Internal Card With Bluetooth® Wireless Technology
Hinge Cover
Keyboard
Palm Rest
USB/IEEE 1394 Board
System Board
Display Assembly
Display Bezel
Display Inverter
Camera
LCD Display Panel
Display Assembly Hinges
Speaker Assembly
Power Button and Multimedia Button Pads
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Specifications
Dell™ Vostro™ 1720 Service Manual Processor
Display
System Information
Keyboard
ExpressCard™
Touch Pad
8-in-1-Memory Card Reader
Fingerprint Reader
Memory
Camera
Ports and Connectors
Battery
Communications
AC Adapter
Video
Physical
Audio
Environmental
NOTE: Offerings may vary by region. For more information regarding the configuration
of your computer, click Start
(or Start in Windows XP)® Help and Support, and
then select the option to view information about your computer.
Processor Processor type
Intel® Core™2 Duo (2.0 - 2.66 GHz)
Intel Celeron® (2.0 - 2.2 GHz)
Intel Celeron Dual Core (1.66 - 1.86 GHz) processor
L1 cache
32 KB per instruction, 32 KB data cache per core
L2 cache
Shared 3 MB or 6 MB
External bus frequency
1067 MHz
System Information System chipset
Intel GM45 or Intel PM45 chipset
Data bus width
64 bits
DRAM bus width
Dual-channel 64-bit bus Processor address bus width
36 bits
Flash EPROM
1 MB
PCI bus (discrete graphics only)
x16 PCI Express
ExpressCard™
NOTE: The ExpressCard slot is designed only for ExpressCards. It does NOT support PC cards.
ExpressCard controller
Integrated
ExpressCard connector
54-mm ExpressCard slot (supports both USB- and
PCIe-based interfaces)
Cards supported
34-mm and 54-mm ExpressCards
8-in-1 Memory Card Reader
Media card controller
O2Micro OZ888
Media card connector
8-in-1 combo card connector
Cards supported
SecureDigital (SD), SDIO, MultiMediaCard (MMC),
Memory Stick, Memory Stick Pro, xD-Picture Card, Hi
Speed-SD, and Hi Density-SD
Memory
Memory module connector
Two DIMM sockets
Memory module capacities
1 GB (one DIMM)
2 GB (one DIMM or two DIMMs)
4 GB (2 DIMMs)
8 GB (two DIMMS, requires 64-bit Windows Vista
operating system)
Memory type
DDR2 800 MHz (if supported by chipset and/or
processor combinations); non-ECC memory only
Minimum memory
1 GB
Maximum memory
8 GB (requires 64-bit Windows Vista operating
system)
Ports and Connectors Audio
Microphone connector and stereo
headphone/speakers connector
IEEE 1394
One 4-pin connector
Dock
Optional USB Port Replicator only
One dedicated half Mini-Card slot for WLAN
Mini-card support (internal expansion slots)
One dedicated half Mini-Card slot for WLAN
One USB-based daughter card with Bluetooth® wireless technology (Dell Wireless 355)
Network adapter
RJ-45 connector
USB, USB PowerShare and eSATA
Six USB 2.0-compliant connectors
Video
15-pin VGA video connector
Communications
Modem
Supports external USB modem (optional) only
Network adapter
10/100/1000 Ethernet LAN on system board
Wireless
WLAN PCI-e Mini-Card, Bluetooth V2.0 card
Mobile Broadband
None
GPS
None
Video Video type
Integrated on system board (hardware accelerated)
Discrete
Video controller
Integrated video: Intel Extreme
Discrete video: NVIDIA GeForce 9400M GS (NB9MGS), 128 bit
Data bus
Integrated video or PCI-Express video x16
Video memory
Integrated video: up to 256 MB shared memory
Discrete video: 512 MB dedicated memory
Video output
Video connector and multimode DisplayPort
LCD interface
LVDS
Audio Audio type
High-definition audio (HDA)
Audio controller
IDT 92HD81
Stereo conversion
24-bit (analog-to-digital and digital-to-analog) Interfaces:
Internal
Internal High Definition Audio
External
Microphone-in connector, stereo
headphones/speakers connector
Speaker
One 2-watt, 4-ohm speakers
Internal speaker amplifier
2W, stereo
Volume controls
Program menus, media control buttons Display Type (active-matrix TFT)
17 inch WXGA+/WUXGA
Dimensions:
Height
245.00 mm (9.64 inches)
Width
383.00 mm (15.00 inches)
Diagonal
431.70 mm (17.00 inches)
Maximum Resolutions:
WXGA+ w/anti-glare
1440x900 with 18-bit color (262 K)
WUXGA with TrueLife
1920X1200 with 18-bit color (262 K)
Refresh rate
60 Hz
Operating angle
0° (closed) to 160°
Viewing angles:
Horizontal
WXGA+: 55/55°
Vertical
WXGA+: 45/45°
Pixel pitch
WXGA 0.258 mm (.010 inch)
WUXGA with TrueLife 0.23 (.009 inch)
Controls
Brightness can be controlled through keyboard
shortcuts
Keyboard
Number of keys
105 (U.S. and Canada); 106 (Europe); 109 (Japan)
Layout
QWERTY/AZERTY/Kanji
Size:
Standard
Full size
Maximum
359.40 mm x 118.90 mm x 5.20 mm (14.15 x 4.681 x
0.205 inches) Touch Pad
X/Y position resolution (graphics table mode)
240 CPI
Size:
Width
73.70 mm (2.90 inches) Height
43.10 mm (1.69 inches) Fingerprint Reader (Optional)
Type
UPEK TCS3 TouchStrip™ strip sensor with CMOS active capacitive pixel-sensing technology
Camera (Optional)
Still Resolution
1.3 mega-pixel
Battery
Type:
6-cell lithium-ion battery
56 WHr
8-cell lithium-ion battery
74 WHr
Dimensions: Depth 6-cell and 8-cell lithium-ion battery
49.97mm (1.97 inches)
Height 6-cell and 8-cell lithium-ion battery
20.20 mm (0.79 inches)
Width 6-cell and 8-cell lithium-ion battery
271.00 mm (10.67 inches)
Weight 6-cell lithium-ion battery
338.70 g
8-cell lithium-ion battery
429.60 g
Voltage:
6-cell lithium-ion battery
11.1 V
8-cell lithium-ion battery
14.8 V
Operating Time (approximate)
4-5 hours (6-cell)
6 hours or more (8-cell)
NOTE: Varies depending on operating conditions and
can be significantly reduced under certain powerintensive conditions
Life span (approximate)
1 year
Temperature range:
Operating
0° to 40°C (32° to 104°F)
Storage
-10° to 65°C (14° to 149°F)
Coin-cell battery
CR2032
AC Adapter
Input voltage
100-240 VAC (90W)
Input current (maximum)
1.5 A (90W)
Input frequency
50-60 Hz (90W)
Temperature range:
Operating
0° to 35°C (32° to 95°F)
Storage
-40° to 65°C ( -40° to 149°F)
Output voltage
19.5 VDC
Output current
5.62 A (maximum at 4-second pulse), 4.62 A
(continuous)
Dimensions:
Height
15.00 mm (0.60 inches)
Width
66.00 mm (2.60 inches)
Depth
127.00 mm (5.00 inches)
Weight
0.29 kg (0.64 lb)
PA-10 90 W D-Series AC adapter:
Output voltage
19.5 VDC
Output current
4.62 A
Height
33.80 mm (1.34 inches)
Width
60.90 mm (2.39 inches)
Depth
153.40 mm (6.04 inches)
Weight (with cables)
0.46 kg (1.01 lbs)
PA-3E 90 E-Series AC adapter:
Output voltage
19.5 VDC
Output current
4.62 A
Height
15.00 mm (0.60 inches)
Width
70.00 mm (2.80 inches)
Depth
147.00 mm (5.80 inches)
Weight
0.34 kg (0.76 lb)
Physical
Height
Front: 29.00 mm (1.14 inches)
Back: 40.50 mm (1.59 inches)
Width
393.00 mm (15.47 inches)
Depth
286.00 mm (11.26 inches)
Weight (with 6-cell battery)
3.09 kg (6.85 lbs)
Weight (with 8-cell battery) 3.18 kg (7.05 lbs)
Environmental Temperature range:
Operating
0° to 35° C (32° to 95° F)
Storage
-40° to 65° C (-40° to 149° F)
Relative humidity (maximum):
Operating
10% to 90% (noncondensing)
Storage
5% to 95% (noncondensing)
Maximum vibration (using a random-vibration spectrum that simulates user environment):
Operating
Storage
0.66 GRMS
1.30 GRMS
Maximum shock (measured with hard drive in head-parked position and a 2-ms half-sine pulse):
Operating
143 G
Storage
163 G
Altitude (maximum):
Operating
-15.2 to 3048 m ( -50 to 10,000 ft)
Storage
-15.2 to 3048 m ( -50 to 10,000 ft)
Airborne contaminant level
G2 or lower as defined by ANSI/ISA-S71.04-1985
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Access Panel
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Access Panel
1.
2.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
3.
Remove the eight screws from the access panel.
4.
Lift the edge of the access panel that is closest to the center of the computer.
5.
Remove the access panel.
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Battery
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Battery
1.
Follow the procedures in Before Working Inside Your Computer.
2.
Slide the battery lock latches into the unlocked position.
3.
Slide the battery toward the back of the computer to remove.
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Power Button and Multimedia Button Pads
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Power Button and Multimedia Button Pads
1.
2.
3.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the hinge cover from the computer.
4.
Remove the screw that secures the power button pad to the computer.
5.
Slide the power button pad to the right.
6.
Remove the screw that secures the multimedia button pad to the computer.
7.
Slide the multimedia button pad to the left.
8.
Turn the multimedia button pad onto the keyboard.
9.
Disconnect the data cable from the multimedia button pad.
10.
Remove the two button pads from the computer.
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Coin-Cell Battery
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Coin-Cell Battery
1.
2.
3.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the access panel from the computer.
4.
Insert scribe into slot and gently pry up the coin-cell battery.
5.
Remove the coin-cell battery.
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Display Bezel
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Display Bezel
1.
2.
Follow the procedures in Before Working Inside Your Computer.
Remove the display assembly from the computer.
3.
Remove the eight rubber screw covers from the display bezel.
4.
Remove the eight screws that secure the bezel to the display assembly.
5.
Remove the bezel from the display assembly.
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Camera
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Camera
1.
2.
3.
Follow the procedures in Before Working Inside Your Computer.
Remove the display assembly from the computer.
Remove the display bezel from the display assembly.
4.
Remove the screw that secures the camera to the display assembly.
5.
Lift the camera from the retention bracket.
6.
Disconnect the camera data cable.
7.
Remove the camera from the display assembly.
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Display Assembly Hinges
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Display Assembly Hinges
1.
2.
3.
4.
Follow the procedures in Before Working Inside Your Computer.
Remove the display assembly from the computer.
Remove the display bezel from the display assembly
Remove the LCD display panel from the display assembly.
5.
Remove the eight screws securing the hinges to the display panel assembly.
6.
Slide the hinges away from the display panel assembly.
7.
Remove the display panel hinges from the display panel assembly.
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Display Inverter
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Display Inverter
1.
2.
Follow the procedures in Before Working Inside Your Computer.
Remove the display assembly from the computer.
3.
Disconnect the data cable from the display inverter.
4.
Disconnect the power cable from the display inverter.
5.
Remove the inverter from the display assembly.
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LCD Display Panel
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the LCD Display Panel
1.
2.
3.
Follow the procedures in Before Working Inside Your Computer.
Remove the display assembly from the computer.
Remove the display bezel from the display assembly.
4.
Remove the two screws that secure the LCD display panel to the display assembly.
5.
Remove the LCD display panel from the display assembly.
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Display Assembly
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Display Assembly
1.
2.
3.
4.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the hinge cover from the computer.
Remove the keyboard from the computer.
5.
Disconnect the antenna cables from the WLAN card.
6.
Remove the three screws that secure the display assembly to the computer chassis.
7.
Disconnect the camera data cable from the system board.
8.
Remove the data and antenna cables from the palm rest.
9.
Disconnect the display data cable from the system board.
10.
Remove the four remaining screws that secure the display assembly to the computer chassis.
11.
Lift the display assembly straight up and remove the display assembly from the computer.
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Fan
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Fan
1.
2.
3.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the access panel from the computer.
4.
Disconnect the fan cable from the system board.
5.
Remove the three fan screws.
6.
Lift up on the fan and remove it from the computer.
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Hinge Cover
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Hinge Cover
1.
2.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
3.
Use a plastic scribe gently to pry the back side of the hinge cover away from the base of the computer.
4.
Starting on the right side, separate the hinge cover from the base of the computer.
5.
Continue to separate the hinge cover from the system working from right to left, then remove the hinge cover.
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Hard Drive
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Hard Drive
1.
2.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
3.
Remove the screw that secures the hard drive access panel to the base of the computer.
4.
Insert a plastic scribe into the slot and lift up the access panel, then remove the panel from the computer.
5.
Remove the two screws that secure the hard drive in place.
6.
Slide the hard drive toward the right side of the computer.
7.
Lift the hard drive from the computer.
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Keyboard
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Keyboard
1.
2.
3.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the power button and multimedia button boards from the computer.
4.
Remove the four keyboard screws that secure the keyboard to the computer
5.
Turn over the keyboard and lay it upside down on the work surface.
6.
Open the keyboard data cable clip.
7.
Remove the keyboard data cable from the clip.
8.
Remove the keyboard from the computer.
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Memory
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing Memory Modules
1.
2.
3.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the access panel from the computer.
4.
If applicable, remove the top memory module by using your fingertips to carefully spread apart the securing clips on each end of the top memory module
connector until the memory module pops up.
5.
Slide the memory module out of the socket.
6.
If applicable, remove the bottom memory module by using your fingertips to carefully spread apart the securing clips on each end of the memory module
connector until the memory module pops up.
7.
Slide the memory module out of the socket.
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Optical Drive
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Optical Drive
1.
2.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
3.
Remove the screw that secures the optical drive in the computer chassis.
4.
Insert a plastic scribe into the notch and slide the optical drive slightly out of the computer.
5.
Remove optical drive from the computer.
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Palm Rest
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Palm Rest
1.
2.
3.
4.
5.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the power button and multimedia button pads from the computer.
Remove the keyboard from the computer.
Remove the display assembly from the computer.
6.
Remove the eleven palm rest screws that secure the palm rest to the bottom of the computer.
7.
Open the touch pad data cable clip.
8.
Remove the touch pad data cable from the clip.
9.
Open the fingerprint reader data cable clip.
10.
Remove the fingerprint reader data cable from the clip.
11.
Remove the nine palm rest screws that secure the palm rest to the top of the computer.
12.
Remove the palm rest from the computer.
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Heat Sink and Processor
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Heat Sink and Processor
1.
2.
3.
4.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the access panel from the computer.
Remove the fan from the computer.
5.
Loosen the four captive screws that secure the heat sink to the system board.
6.
Lift the edge of the heat sink that is closest to the center of system board.
7.
Slide the heat sink toward the center of the computer, then lift up the heat sink and remove it from the computer.
8.
Rotate the processor cam counterclockwise.
9.
Lift the processor straight up from its socket, taking care not to bend any of the processor pins.
Back to Contents Page
Speaker Assembly
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Speaker Assembly
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the access panel from the computer.
Remove the fan from the computer.
Remove the hard drive from the computer.
Remove the optical drive from the computer.
Remove the hinge cover from the computer.
Remove the keyboard from the computer.
Remove the display assembly from the computer.
Remove the palm rest from the computer.
Remove the system board from the computer.
12.
Remove the four screws that secure the speaker assembly to the computer chassis.
13.
Remove the speaker assembly from the computer.
Back to Contents Page
System Board
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your Tablet-PC, read the safety information that shipped with your Tablet-PC. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the System Board
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the access panel from the computer.
Remove the fan from the computer.
Remove the hard drive from the computer.
Remove the optical drive from the computer.
Remove the hinge cover from the computer.
Remove the keyboard from the computer.
Remove the display assembly from the computer.
Remove the palm rest from the computer.
11.
Disconnect the speaker cable from the system board.
12.
Disconnect the USB/IEEE 1394 data cable from the system board.
13.
Disconnect the Bluetooth® module cable from the system board.
14.
Disconnect the power cable from the system board.
15.
Remove the three screws that secure the system board to the computer chassis.
16.
Remove the system board from the computer chassis.
Back to Contents Page
USB/IEEE 1394 Board
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the USB/IEEE 1394 Board
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the access panel from the computer.
Remove the fan from the computer.
Remove the hard drive from the computer.
Remove the optical drive from the computer.
Remove the hinge cover from the computer.
Remove the keyboard from the computer.
Remove the display assembly from the computer.
Remove the palm rest from the computer.
11.
Disconnect the USB board data cable from the USB board.
12.
Remove the two screws that secure the USB board to the computer chassis.
13.
Lift the inside edge of the USB board and remove the board from the computer.
Back to Contents Page
Wireless Local Area Network (WLAN) Card
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the WLAN Card
1.
2.
3.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the access panel from the computer.
4.
Disconnect the antenna cables from the WLAN card.
5.
Remove the screw that secures the WLAN card to the computer.
6.
Remove the WLAN card from the computer.
Back to Contents Page
Internal Card With Bluetooth® Wireless Technology
Dell™ Vostro™ 1720 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Internal Card With Bluetooth Wireless Technology
1.
2.
3.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery from the computer.
Remove the hard drive from the computer.
4.
Remove the screw that secures the Bluetooth module in place.
5.
Lift the edge of the Bluetooth module closest to the front of the computer.
6.
Disconnect the Bluetooth module data cable.
7.
Remove the Bluetooth module from the computer.
Back to Contents Page
Working on Your Computer
Dell™ Vostro™ 1720 Service Manual
Before Working Inside Your Computer
Recommended Tools
Turning Off Your Computer
After Working Inside Your Computer
Before Working Inside Your Computer
Use the following safety guidelines to help protect your computer from potential damage and to help to ensure your personal safety. Unless otherwise noted,
each procedure included in this document assumes that the following conditions exist:
l
l
l
You have performed the steps in Working on Your Computer.
You have read the safety information that shipped with your computer.
A component can be replaced or—if purchased separately—installed by performing the removal procedure in reverse order.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is
not covered by your warranty.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal
surface, such as a connector on the back of the computer.
CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its edges or by its metal
mounting bracket. Hold a component such as a processor by its edges, not by its pins.
CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have connectors with locking
tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the cable. As you pull connectors apart, keep
them evenly aligned to avoid bending any connector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented
and aligned.
NOTE: The color of your computer and certain components may appear differently than shown in this document.
To avoid damaging your computer, perform the following steps before you begin working inside the computer.
1.
2.
3.
Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.
Turn off your computer (see Turning Off Your Computer).
If the computer is connected to a docking device (docked) such as the optional Media Base or Battery Slice, undock it.
CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device.
4.
5.
6.
Disconnect all network cables from the computer.
Disconnect your computer and all attached devices from their electrical outlets.
Close the display and turn the computer upside-down on a flat work surface.
CAUTION: To avoid damaging the system board, you must remove the main battery before you service the computer.
7.
8.
9.
10.
Remove the main battery (see Removing the Battery).
Turn the computer top-side up.
Open the display.
Press the power button to ground the system board.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the display.
CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back
of the computer. While you work, periodically touch an unpainted metal surface to dissipate static electricity, which could harm internal
components.
11.
12.
Remove any installed ExpressCards or Smart Cards from the appropriate slots.
Remove the hard drive (see Removing the Hard Drive).
Recommended Tools
The procedures in this document may require the following tools:
l
l
l
l
l
Small flat-blade screwdriver
#0 Phillips screwdriver
#1 Phillips screwdriver
Small plastic scribe
Flash BIOS update program CD
Turning Off Your Computer
CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer.
1.
Shut down the operating system:
l In Windows Vista:
Click Start
l
, then click the arrow in the lower-right corner of the Start menu as shown below, and then click Shut Down.
In Windows XP:
Click Start® Turn Off Computer® Turn Off.
The computer turns off after the operating system shutdown process is complete.
2.
Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut
down your operating system, press and hold the power button for about 4 seconds to turn them off.
After Working Inside Your Computer
After you complete any replacement procedure, ensure you connect any external devices, cards, and cables before turning on your computer.
CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries designed for
other Dell computers.
1.
2.
Connect any external devices, such as a port replicator, battery slice, or media base, and replace any cards, such as an ExpressCard.
Connect any telephone or network cables to your computer.
CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the computer.
3.
4.
5.
Replace the battery.
Connect your computer and all attached devices to their electrical outlets.
Turn on your computer.