Dell Inspiron 3050 User manual

Inspiron Micro Desktop
3000 Series
Service Manual
Computer Model: Inspiron 3050
Regulatory Model: D12U
Regulatory Type: D12U001

Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better
use of your computer.
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.
Copyright ©2015 Dell Inc. All rights reserved. This product is protected by U.S. and
international copyright and intellectual property laws. Dell™and the Dell logo are trademarks
of Dell Inc. in the United States and/or other jurisdictions. All other marks and names
mentioned herein may be trademarks of their respective companies.
2015 - 04
Rev. A00

Contents
Before working inside your computer.....................................7
Before you begin ...............................................................................................7
Safety instructions..............................................................................................8
Recommended tools......................................................................................... 9
After working inside your computer......................................10
Technical overview....................................................................11
Inside view of your computer.......................................................................... 11
System-board components (top view)........................................................... 12
System-board components (bottom view).....................................................13
Removing the base cover.........................................................14
Procedure.........................................................................................................14
Replacing the base cover......................................................... 17
Procedure......................................................................................................... 17
Removing the memory module.............................................. 18
Prerequisites.....................................................................................................18
Procedure.........................................................................................................18
Replacing the memory module.............................................. 20
Procedure........................................................................................................ 20
Post-requisites................................................................................................. 22
Removing the processor fan................................................... 23
Prerequisites.....................................................................................................23
Procedure.........................................................................................................23
3

Replacing the processor fan................................................... 26
Procedure........................................................................................................ 26
Post-requisites.................................................................................................26
Removing the processor heat-sink........................................27
Prerequisites.....................................................................................................27
Procedure.........................................................................................................27
Replacing the processor heat-sink........................................ 29
Procedure........................................................................................................ 29
Post-requisites.................................................................................................29
Removing the wireless card.................................................... 30
Prerequisites.................................................................................................... 30
Procedure.........................................................................................................31
Replacing the wireless card.....................................................33
Procedure.........................................................................................................33
Post-requisites................................................................................................. 35
Removing the coin-cell battery..............................................36
Prerequisites.....................................................................................................36
Procedure.........................................................................................................37
Replacing the coin-cell battery.............................................. 39
Procedure........................................................................................................ 39
Post-requisites.................................................................................................39
Removing the solid-state drive.............................................. 40
Prerequisites.................................................................................................... 40
Procedure.........................................................................................................41
4

Replacing the solid-state drive...............................................43
Procedure........................................................................................................ 43
Post-requisites.................................................................................................43
Removing the hard drive......................................................... 44
Prerequisites.................................................................................................... 44
Procedure........................................................................................................ 45
Replacing the hard drive..........................................................48
Procedure........................................................................................................ 48
Post-requisites.................................................................................................48
Removing the system board................................................... 49
Prerequisites.................................................................................................... 49
Procedure........................................................................................................ 49
Replacing the system board.................................................... 51
Procedure.........................................................................................................51
Post-requisites................................................................................................. 51
Removing the top-cover assembly........................................ 52
Prerequisites.....................................................................................................52
Procedure.........................................................................................................52
Replacing the top-cover assembly........................................ 54
Procedure........................................................................................................ 54
Post-requisites.................................................................................................54
BIOS setup program..................................................................55
Overview.......................................................................................................... 55
Entering BIOS setup program......................................................................... 55
Clearing Forgotten Passwords........................................................................56
Prerequisites...............................................................................................56
Procedure...................................................................................................57
5

Post-requisites........................................................................................... 59
Clearing CMOS Settings.................................................................................. 59
Prerequisites...............................................................................................59
Procedure.................................................................................................. 60
Post-requisites........................................................................................... 62
Flashing the BIOS...................................................................... 63
Getting help and contacting Dell...........................................64
Self-help resources......................................................................................... 64
Contacting Dell................................................................................................64
6

Before working inside your
computer
CAUTION: To avoid damaging the components and cards, handle
them by their edges and avoid touching pins and contacts.
NOTE: The images in this document may differ from your computer
depending on the configuration you ordered.
Before you begin
1 Save and close all open files and exit all open applications.
2 Shut down your computer.
– Windows 8.1: On the Start screen, click or tap the power icon →
Shut down.
– Windows 7: Click or tap Start → 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 cables such as telephone cables, network cables and so
on, from your computer.
5 Disconnect all attached devices and peripherals, such as keyboard,
mouse, monitor, and so on, from your computer.
6 Remove any media card and optical disc from your computer, if
applicable.
7 After the computer is unplugged, press and hold the power button for 5
seconds to ground the system board.
7

Safety instructions
Use the following safety guidelines to protect your computer from potential
damage and ensure your personal safety.
WARNING: Before working inside your computer, read the safety
information that shipped with your computer. For more safety best
practices, see the Regulatory Compliance home page at dell.com/
regulatory_compliance.
WARNING: Disconnect 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 to
the power source.
CAUTION: To avoid damaging the computer, ensure that the work
surface is flat and clean.
CAUTION: To avoid damaging the components and cards, handle
them by their edges and avoid touching pins and 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 shipped with the product or
at dell.com/regulatory_compliance.
CAUTION: Before touching anything inside your computer, ground
yourself by touching an unpainted metal surface. 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 on its connector or on
its pull tab, not on the cable itself. Some cables have connectors with
locking tabs or thumb-screws that you must disengage before
disconnecting the cable. When disconnecting cables, keep them
evenly aligned to avoid bending any connector pins. When connecting
cables, ensure that the ports and connectors are correctly oriented
and aligned.
CAUTION: To disconnect a network cable, first unplug the cable from
your computer and then unplug the cable from the network device.
8

CAUTION: Press and eject any installed card from the media-card
reader.
Recommended tools
The procedures in this document may require the following tools:
• Philips screwdriver
• Plastic scribe
9

After working inside your
computer
CAUTION: Leaving stray or loose screws inside your computer may
severely damage your computer.
1 Replace all screws and ensure that no stray screws remain inside your
computer.
2 Connect any external devices, peripherals, and cables you removed
before working on your computer.
3 Replace any media cards, discs, and 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.
10

Technical overview
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before working inside your computer. After working inside your
computer, follow the instructions in After working inside your
computer. For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
Inside view of your computer
1 processor heat-sink 2 processor fan
3 system board 4 top-cover assembly
11

5 memory module 6 brackets (2)
System-board components (top view)
1 memory-module slot 2 processor-fan cable connector
(CPU FAN)
3 processor
12

System-board components (bottom view)
1 solid-state drive slot (NGF_SSD) 2 CMOS and password reset
jumper (CMOS+PW)
3 wireless-card slot (NGF_WLAN) 4 coin-cell battery
5 hard-drive cable connector
(SATA_HDD) 6 coin-cell battery cable connector (BATTERY)
13

Removing the base cover
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before working inside your computer. After working inside your
computer, follow the instructions in After working inside your
computer. For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
Procedure
CAUTION: Place the computer on a soft and clean surface to avoid
scratching the top cover.
1 Turn the computer over.
14

2 Remove the screws that secure the base cover to the top-cover
assembly.
1 screws (4) 2 base cover
3 Hold the base cover and gently loosen it to release the tabs that secure
the base cover to the top-cover assembly.
15

4 Lift the base cover off the top-cover assembly.
1 base cover 2 top-cover assembly
3 tabs (4)
16

Replacing the base cover
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before working inside your computer. After working inside your
computer, follow the instructions in After working inside your
computer. For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
Procedure
1 Align the tabs on the top-cover assembly with the slots on the base cover
and snap the top-cover assembly in place.
2 Replace the screws that secure the base cover to the top-cover
assembly.
3 Turn the computer over.
17

Removing the memory module
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before working inside your computer. After working inside your
computer, follow the instructions in After working inside your
computer. For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
Prerequisites
Remove the base cover.
Procedure
1 Use your fingertips to carefully spread apart the securing clips on each
end of the memory-module slot until the memory module pops up.
18

2 Slide and remove the memory module from the memory-module slot.
1 memory-module slot 2 securing clips (2)
3 memory module
19

Replacing the memory module
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before working inside your computer. After working inside your
computer, follow the instructions in After working inside your
computer. For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
Procedure
1 Align the notch on the memory module with the tab on the memory-
module slot.
20