Dell D32M User manual

Vostro 3020 Tower Desktop
Service Manual
Regulatory Model: D32M
Regulatory Type: D32M002
December 2021
Rev. A00

Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid
the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
© 2022-2023 Dell Inc. or its subsidiaries. All rights reserved. Dell Technologies, Dell, and other trademarks are trademarks of Dell Inc. or its
subsidiaries. Other trademarks may be trademarks of their respective owners.

Chapter 1: Working inside your computer...................................................................................... 6
Before working inside your computer.............................................................................................................................6
Safety instructions.............................................................................................................................................................. 6
Electrostatic discharge—ESD protection......................................................................................................................7
ESD field service kit ........................................................................................................................................................... 7
Transporting sensitive components................................................................................................................................ 8
After working inside your computer................................................................................................................................9
Chapter 2: Removing and installing components.......................................................................... 10
Recommended tools..........................................................................................................................................................10
Screw list............................................................................................................................................................................. 10
Major components of Vostro 3020 Tower Desktop...................................................................................................11
Left-side cover................................................................................................................................................................... 12
Removing the left-side cover....................................................................................................................................12
Installing the left-side cover...................................................................................................................................... 13
Left-side cover................................................................................................................................................................... 14
Removing the left-side cover....................................................................................................................................14
Installing the left-side cover......................................................................................................................................15
Front cover.......................................................................................................................................................................... 16
Removing the front cover..........................................................................................................................................16
Installing the front cover............................................................................................................................................ 17
Optical drive........................................................................................................................................................................ 18
Removing the optical drive........................................................................................................................................ 18
Installing the optical drive.......................................................................................................................................... 19
Optical-drive bezel.............................................................................................................................................................21
Removing the optical-drive bezel.............................................................................................................................21
Installing the optical-drive bezel.............................................................................................................................. 22
Hard drive............................................................................................................................................................................22
Removing the hard drive........................................................................................................................................... 22
Installing the hard drive..............................................................................................................................................23
Power button..................................................................................................................................................................... 25
Removing the power button.....................................................................................................................................25
Installing the power button....................................................................................................................................... 25
Graphics card..................................................................................................................................................................... 26
Removing the graphics card..................................................................................................................................... 26
Installing the graphics card....................................................................................................................................... 27
Memory................................................................................................................................................................................29
Removing the memory............................................................................................................................................... 29
Installing the memory................................................................................................................................................. 30
Solid-state drive................................................................................................................................................................. 31
Removing the solid-state drive................................................................................................................................. 31
Installing the solid-state drive.................................................................................................................................. 32
Wireless card...................................................................................................................................................................... 33
Removing the wireless card...................................................................................................................................... 33
Contents
Contents 3

Installing the wireless card........................................................................................................................................ 34
Coin-cell battery................................................................................................................................................................35
Removing the coin-cell battery................................................................................................................................35
Installing the coin-cell battery.................................................................................................................................. 36
Antenna modules............................................................................................................................................................... 36
Removing the antenna modules...............................................................................................................................36
Installing the antenna modules.................................................................................................................................38
Media-card reader.............................................................................................................................................................39
Removing the media-card reader............................................................................................................................ 39
Installing the media-card reader.............................................................................................................................. 40
Power-supply unit.............................................................................................................................................................. 41
Removing the power-supply unit..............................................................................................................................41
Installing the power-supply unit...............................................................................................................................43
Fan shroud.......................................................................................................................................................................... 44
Removing the fan shroud.......................................................................................................................................... 44
Installing the fan shroud............................................................................................................................................ 45
Processor fan and heat-sink assembly.........................................................................................................................46
Removing the processor fan and heat-sink assembly........................................................................................ 46
Installing the processor fan and heat-sink assembly.......................................................................................... 47
Processor............................................................................................................................................................................ 48
Removing the processor............................................................................................................................................48
Installing the processor.............................................................................................................................................. 49
System board..................................................................................................................................................................... 50
Removing the system board.....................................................................................................................................50
Installing the system board....................................................................................................................................... 53
Chapter 3: Drivers and downloads............................................................................................... 58
Chapter 4: System setup.............................................................................................................59
BIOS overview................................................................................................................................................................... 59
Entering BIOS setup program........................................................................................................................................ 59
Navigation keys................................................................................................................................................................. 59
Boot Sequence.................................................................................................................................................................. 60
One time boot menu.........................................................................................................................................................60
System setup options.......................................................................................................................................................60
System and setup password...........................................................................................................................................70
Assigning a system setup password....................................................................................................................... 70
Deleting or changing an existing system setup password..................................................................................71
Real Time Clock (RTC) reset.....................................................................................................................................71
Clearing BIOS (System Setup) and System passwords.....................................................................................72
Updating the BIOS............................................................................................................................................................ 72
Updating the BIOS in Windows................................................................................................................................ 72
Updating the BIOS using the USB drive in Windows..........................................................................................72
Updating the BIOS from the F12 One-Time boot menu.....................................................................................73
Chapter 5: Troubleshooting......................................................................................................... 74
Locate the Service Tag or Express Service Code of your Dell computer ..............................................74
SupportAssist diagnostics............................................................................................................................................... 74
System diagnostic lights.................................................................................................................................................. 74
4Contents

Recovering the operating system..................................................................................................................................74
WiFi power cycle............................................................................................................................................................... 75
Drain residual flea power (perform hard reset)......................................................................................................... 75
Chapter 6: Getting help and contacting Dell................................................................................ 76
Contents 5

Working inside your computer
Before working inside your computer
About this task
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Steps
1. Save and close all open files and exit all open applications.
2. Shut down your computer. Click Start > Power > Shut down.
NOTE: If you are using a different operating system, see the documentation of your operating system for shut-down
instructions.
3. Disconnect your computer and all attached devices from their electrical outlets.
4. Disconnect all attached network devices and peripherals, such as keyboard, mouse, and monitor from your computer.
CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the
cable from the network device.
5. Remove any media card and optical disc from your computer, if applicable.
Safety instructions
Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless
otherwise noted, each procedure included in this document assumes that you have read the safety information that shipped
with your computer.
WARNING: Before working inside your computer, read the safety information that is shipped with your
computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/
regulatory_compliance.
WARNING: Disconnect your computer from all power sources before opening the computer cover or panels.
After you finish working inside the computer, replace all covers, panels, and screws before connecting your
computer to an electrical outlet.
CAUTION: To avoid damaging the computer, ensure that the work surface is flat, dry, and clean.
CAUTION: To avoid damaging the components and cards, handle them by their edges, and avoid touching the
pins and the contacts.
CAUTION: You should only perform troubleshooting and repairs as authorized or directed by the Dell technical
assistance team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. See the
safety instructions that is shipped with the product or at www.dell.com/regulatory_compliance.
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.
CAUTION: When you disconnect a cable, pull it by its connector or its pull tab, not the cable itself. Some cables
have connectors with locking tabs or thumbscrews that you must disengage before disconnecting the cable.
1
6 Working inside your computer

When disconnecting cables, keep them evenly aligned to avoid bending the connector pins. When connecting
cables, ensure that the ports and the connectors are correctly oriented and aligned.
CAUTION: Press and eject any installed card from the media-card reader.
CAUTION: Exercise caution when handling Lithium-ion batteries in laptops. Swollen batteries should not be used
and should be replaced and disposed properly.
NOTE: The color of your computer and certain components may appear differently than shown in this document.
Electrostatic discharge—ESD protection
ESD is a major concern when you handle electronic components, especially sensitive components such as expansion cards,
processors, memory DIMMs, and system boards. Very slight charges can damage circuits in ways that may not be obvious, such
as intermittent problems or a shortened product life span. As the industry pushes for lower power requirements and increased
density, ESD protection is an increasing concern.
Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than
in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.
Two recognized types of ESD damage are catastrophic and intermittent failures.
●Catastrophic – Catastrophic failures represent approximately 20 percent of ESD-related failures. The damage causes
an immediate and complete loss of device functionality. An example of catastrophic failure is a memory DIMM that has
received a static shock and immediately generates a "No POST/No Video" symptom with a beep code emitted for missing or
nonfunctional memory.
●Intermittent – Intermittent failures represent approximately 80 percent of ESD-related failures. The high rate of
intermittent failures means that most of the time when damage occurs, it is not immediately recognizable. The DIMM
receives a static shock, but the tracing is merely weakened and does not immediately produce outward symptoms related to
the damage. The weakened trace may take weeks or months to melt, and in the meantime may cause degradation of memory
integrity, intermittent memory errors, etc.
The more difficult type of damage to recognize and troubleshoot is the intermittent (also called latent or "walking wounded")
failure.
Perform the following steps to prevent ESD damage:
●Use a wired ESD wrist strap that is properly grounded. The use of wireless anti-static straps is no longer allowed; they do not
provide adequate protection. Touching the chassis before handling parts does not ensure adequate ESD protection on parts
with increased sensitivity to ESD damage.
●Handle all static-sensitive components in a static-safe area. If possible, use anti-static floor pads and workbench pads.
●When unpacking a static-sensitive component from its shipping carton, do not remove the component from the anti-static
packing material until you are ready to install the component. Before unwrapping the anti-static packaging, ensure that you
discharge static electricity from your body.
●Before transporting a static-sensitive component, place it in an anti-static container or packaging.
ESD field service kit
The unmonitored Field Service kit is the most commonly used service kit. Each Field Service kit includes three main components:
anti-static mat, wrist strap, and bonding wire.
Components of an ESD field service kit
The components of an ESD field service kit are:
●Anti-Static Mat – The anti-static mat is dissipative and parts can be placed on it during service procedures. When using an
anti-static mat, your wrist strap should be snug and the bonding wire should be connected to the mat and to any bare metal
on the system being worked on. Once deployed properly, service parts can be removed from the ESD bag and placed directly
on the mat. ESD-sensitive items are safe in your hand, on the ESD mat, in the system, or inside a bag.
●Wrist Strap and Bonding Wire – The wrist strap and bonding wire can be either directly connected between your wrist
and bare metal on the hardware if the ESD mat is not required, or connected to the anti-static mat to protect hardware that
is temporarily placed on the mat. The physical connection of the wrist strap and bonding wire between your skin, the ESD
mat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never
Working inside your computer 7

use wireless wrist straps. Always be aware that the internal wires of a wrist strap are prone to damage from normal wear
and tear, and must be checked regularly with a wrist strap tester in order to avoid accidental ESD hardware damage. It is
recommended to test the wrist strap and bonding wire at least once per week.
●ESD Wrist Strap Tester – The wires inside of an ESD strap are prone to damage over time. When using an unmonitored
kit, it is a best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A
wrist strap tester is the best method for doing this test. If you do not have your own wrist strap tester, check with your
regional office to find out if they have one. To perform the test, plug the wrist-strap's bonding-wire into the tester while it is
strapped to your wrist and push the button to test. A green LED is lit if the test is successful; a red LED is lit and an alarm
sounds if the test fails.
●Insulator Elements – It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts
that are insulators and often highly charged.
●Working Environment – Before deploying the ESD Field Service kit, assess the situation at the customer location. For
example, deploying the kit for a server environment is different than for a desktop or portable environment. Servers are
typically installed in a rack within a data center; desktops or portables are typically placed on office desks or cubicles. Always
look for a large open flat work area that is free of clutter and large enough to deploy the ESD kit with additional space to
accommodate the type of system that is being repaired. The workspace should also be free of insulators that can cause an
ESD event. On the work area, insulators such as Styrofoam and other plastics should always be moved at least 12 inches or
30 centimeters away from sensitive parts before physically handling any hardware components
●ESD Packaging – All ESD-sensitive devices must be shipped and received in static-safe packaging. Metal, static-shielded
bags are preferred. However, you should always return the damaged part using the same ESD bag and packaging that the
new part arrived in. The ESD bag should be folded over and taped shut and all the same foam packing material should be
used in the original box that the new part arrived in. ESD-sensitive devices should be removed from packaging only at an
ESD-protected work surface, and parts should never be placed on top of the ESD bag because only the inside of the bag is
shielded. Always place parts in your hand, on the ESD mat, in the system, or inside an anti-static bag.
●Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or parts
to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport.
ESD protection summary
It is recommended to use the traditional wired ESD grounding wrist strap and protective anti-static mat at all times when
servicing Dell products. In addition, it is critical to keep sensitive parts separate from all insulator parts while performing service
and that they use anti-static bags for transporting sensitive components.
Transporting sensitive components
When transporting ESD sensitive components such as replacement parts or parts to be returned to Dell, it is critical to place
these parts in anti-static bags for safe transport.
Lifting equipment
Adhere to the following guidelines when lifting heavy weight equipment:
CAUTION: Do not lift greater than 50 pounds. Always obtain additional resources or use a mechanical lifting
device.
1. Get a firm balanced footing. Keep your feet apart for a stable base, and point your toes out.
2. Tighten stomach muscles. Abdominal muscles support your spine when you lift, offsetting the force of the load.
3. Lift with your legs, not your back.
4. Keep the load close. The closer it is to your spine, the less force it exerts on your back.
5. Keep your back upright, whether lifting or setting down the load. Do not add the weight of your body to the load. Avoid
twisting your body and back.
6. Follow the same techniques in reverse to set the load down.
8Working inside your computer

After working inside your computer
About this task
CAUTION: Leaving stray or loose screws inside your computer may severely damage your computer.
Steps
1. Replace all screws and ensure that no stray screws remain inside your computer.
2. Connect any external devices, peripherals, or cables you removed before working on your computer.
3. Replace any media cards, discs, or any other parts that you removed before working on your computer.
4. Connect your computer and all attached devices to their electrical outlets.
5. Turn on your computer.
Working inside your computer 9

Removing and installing components
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Recommended tools
The procedures in this document may require the following tools:
●Phillips screwdriver #0
●Phillips screwdriver #1
●Plastic scribe
Screw list
NOTE: When removing screws from a component, it is recommended to note the screw type, the quantity of screws, and
then place them in a screw storage box. This is to ensure that the correct number of screws and correct screw type is
restored when the component is replaced.
NOTE: Some computers have magnetic surfaces. Ensure that the screws are not left attached to such surfaces when
replacing a component.
NOTE: Screw color may vary with the configuration ordered.
Table 1. Screw list
Component Screw type Quantity Screw image
Left-side cover 6-32 2
Solid-state drive M2x3.5 1
Wireless card M2x3.5 1
Hard drive 6-32, pan head 4
Power-supply unit #6-32, hex head 3
Optical drive M2x2 2
Media-card reader 6-32, pan head 1
Front I/O-bracket 6-32, pan head 2
2
10 Removing and installing components

Table 1. Screw list (continued)
Component Screw type Quantity Screw image
Processor fan and heat-sink
assembly
Captive (M3) 4
System board 6-32, hex head 8
Major components of Vostro 3020 Tower Desktop
The following image shows the major components of Vostro 3020 Tower Desktop.
1. left-side cover
2. coin-cell battery
3. optical drive
4. 2280 solid-state drive
Removing and installing components 11

5. 2230 solid-state drive
6. media-card reader
7. system board
8. power-supply unit
9. chassis
10. graphics card
11. hard drive
12. fan and heat-sink assembly
13. fan shroud
14. wireless card
15. processor
16. memory module
NOTE: Dell provides a list of components and their part numbers for the original system configuration purchased. These
parts are available according to warranty coverages purchased by the customer. Contact your Dell sales representative for
purchase options.
Left-side cover
Removing the left-side cover
Prerequisites
1. Follow the procedure in Before working inside your computer.
About this task
The following image(s) indicate the location of the left-side cover and provides a visual representation of the removal
procedure.
12 Removing and installing components

Steps
1. Remove the two screws (6-32) that secure the left-side cover to the chassis.
2. Holding the tab on the left-side cover firmly, slide and remove the left-side cover from the chassis.
Installing the left-side cover
Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
The following image(s) indicate the location of the left-side cover and provides a visual representation of the installation
procedure.
Removing and installing components 13

Steps
1. Holding the left-side cover firmly on both sides, slide it into the chassis towards the front of the computer.
2. Replace the two screws (6-32) that secure the left-side cover to the chassis.
Next steps
1. Follow the procedure in After working inside your computer.
Left-side cover
Removing the left-side cover
Prerequisites
1. Follow the procedure in Before working inside your computer.
About this task
The following image(s) indicate the location of the left-side cover and provides a visual representation of the removal
procedure.
14 Removing and installing components

Steps
1. Remove the two screws (6-32) that secure the left-side cover to the chassis.
2. Holding the tab on the left-side cover firmly, slide and remove the left-side cover from the chassis.
Installing the left-side cover
Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
The following image(s) indicate the location of the left-side cover and provides a visual representation of the installation
procedure.
Removing and installing components 15

Steps
1. Holding the left-side cover firmly on both sides, slide it into the chassis towards the front of the computer.
2. Replace the two screws (6-32) that secure the left-side cover to the chassis.
Next steps
1. Follow the procedure in After working inside your computer.
Front cover
Removing the front cover
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the left-side cover.
About this task
The following image(s) indicate the location of the front cover and provides a visual representation of the removal procedure.
16 Removing and installing components

Steps
1. Gently pry and release the tabs that secure the front-cover to the chassis.
2. Open the front cover and lift it away from the chassis.
Installing the front cover
Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
The following image(s) indicate the location of the front cover and provides a visual representation of the installation procedure.
Removing and installing components 17

Steps
1. Align and insert the front-cover tabs into the slots on right side of the chassis.
2. Rotate the front cover towards the chassis and snap the tabs into place.
Next steps
1. Install the left-side cover.
2. Follow the procedure in After working inside your computer.
Optical drive
Removing the optical drive
Prerequisites
1. Follow the procedure in Before working inside your computer.
2. Remove the left-side cover.
3. Remove the front cover.
About this task
NOTE: Depending on the configuration ordered, your computer may not have an optical drive installed.
The following image(s) indicate the location of the optical drive and provides a visual representation of the removal procedure.
18 Removing and installing components

Steps
1. Place the computer on its side with the left-side facing up.
2. Disconnect the power and data cables from the optical drive.
3. Remove the two screws (M2x2) that secure the optical drive to the optical-drive cage.
4. Pull to slide out the optical drive through the front of the computer.
Installing the optical drive
Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
The following image(s) indicate the location of the optical drive and provides a visual representation of the installation
procedure.
Removing and installing components 19

Steps
1. Slide the optical drive into the optical-drive cage through the front of the computer.
2. Replace the two screws (M2x2) that secure the optical drive to the optical-drive cage.
3. Connect the power and data cables to the optical drive.
4. Place the computer in an upright position.
Next steps
1. Install the front cover.
2. Install the left-side cover.
3. Follow the procedure in After working inside your computer.
20 Removing and installing components