Dell OptiPlex 7450 User manual

Dell OptiPlex 7450 All-In-One
Owner's Manual
Regulatory Model: W11C
Regulatory Type: W11C002
June 2023
Rev. A02

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.
© 2017- 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 on your computer............................................................................................7
Before working inside your computer............................................................................................................................. 7
Safety instructions.............................................................................................................................................................. 7
Recommended tools........................................................................................................................................................... 8
Turning off your computer................................................................................................................................................ 8
Turning off your computer.......................................................................................................................................... 8
Turning off your — Windows..................................................................................................................................... 9
After working inside your computer................................................................................................................................9
Important Information........................................................................................................................................................ 9
Chapter 2: Chassis overview........................................................................................................ 10
System front chassis view...............................................................................................................................................10
System left chassis view...................................................................................................................................................11
System right chassis view................................................................................................................................................12
System top chassis view.................................................................................................................................................. 13
Rear View............................................................................................................................................................................. 14
Chapter 3: Disassembly and reassembly.......................................................................................15
Stand.....................................................................................................................................................................................15
Removing the stand.....................................................................................................................................................15
Installing the stand....................................................................................................................................................... 17
Cable cover.......................................................................................................................................................................... 17
Removing the cable cover..........................................................................................................................................17
Installing the cable cover............................................................................................................................................18
Side Cover........................................................................................................................................................................... 18
Removing the back cover.......................................................................................................................................... 18
Installing the back cover.............................................................................................................................................19
Optical drive....................................................................................................................................................................... 20
Removing the optical drive assembly..................................................................................................................... 20
Installing the optical drive assembly........................................................................................................................ 21
Power and On-Screen Display buttons board.............................................................................................................21
Removing the On-Screen Display- OSD buttons board......................................................................................21
Installing the OSD buttons board............................................................................................................................ 22
Speaker cover.................................................................................................................................................................... 22
Removing the speaker cover.................................................................................................................................... 22
Installing the speaker cover...................................................................................................................................... 23
Hard drive............................................................................................................................................................................24
Removing the hard drive assembly......................................................................................................................... 24
Installing the hard drive assembly........................................................................................................................... 25
System board shield......................................................................................................................................................... 25
Removing the system board shield......................................................................................................................... 25
Installing the system board shield........................................................................................................................... 25
Memory modules............................................................................................................................................................... 26
Removing the memory module.................................................................................................................................26
Contents
Contents 3

Installing the memory module...................................................................................................................................26
Solid State Drive ...............................................................................................................................................................27
Removing the SSD card............................................................................................................................................. 27
Installing the SSD card............................................................................................................................................... 27
Coin-cell battery................................................................................................................................................................ 28
Removing the coin cell battery................................................................................................................................ 28
Installing the coin cell battery...................................................................................................................................28
WLAN card..........................................................................................................................................................................28
Removing the WLAN card.........................................................................................................................................28
Installing the WLAN card........................................................................................................................................... 29
Heat sink ............................................................................................................................................................................ 29
Removing the heat sink ............................................................................................................................................ 29
Installing the heat sink................................................................................................................................................30
Speaker................................................................................................................................................................................ 30
Removing the speaker module................................................................................................................................. 30
Installing the speaker module.................................................................................................................................... 31
Power supply unit..............................................................................................................................................................32
Removing the Power Supply Unit - PSU............................................................................................................... 32
Installing the Power Supply Unit - PSU................................................................................................................. 34
VESA mount bracket........................................................................................................................................................ 34
Removing the VESA mount bracket....................................................................................................................... 34
Installing the VESA mount bracket......................................................................................................................... 35
Converter board................................................................................................................................................................ 35
Removing the converter board................................................................................................................................ 35
Installing the converter board.................................................................................................................................. 36
System fan.......................................................................................................................................................................... 36
Removing the system fan..........................................................................................................................................36
Installing the system fan............................................................................................................................................ 37
Intrusion switch................................................................................................................................................................. 38
Removing the intrusion switch.................................................................................................................................38
Installing the intrusion switch...................................................................................................................................39
Processor............................................................................................................................................................................ 39
Removing the processor............................................................................................................................................39
Installing the processor.............................................................................................................................................. 40
System board..................................................................................................................................................................... 40
Removing the system board..................................................................................................................................... 40
Installing the system board....................................................................................................................................... 42
System board layout................................................................................................................................................... 43
Chassis frame.....................................................................................................................................................................43
Removing the chassis frame.....................................................................................................................................43
Installing the chassis frame.......................................................................................................................................45
Display panel.......................................................................................................................................................................45
Removing the display panel...................................................................................................................................... 45
Installing the display panel.........................................................................................................................................46
Camera................................................................................................................................................................................. 47
Removing camera module..........................................................................................................................................47
Installing camera module............................................................................................................................................48
Chapter 4: M.2 Intel Optane Memory Module 16 GB.....................................................................49
Overview............................................................................................................................................................................. 49
4Contents

Intel®OptaneTM Memory Module Driver Requirements.......................................................................................... 49
Installing M.2 Intel Optane Memory Module 16 GB...................................................................................................49
Product specifications...................................................................................................................................................... 51
Environmental Conditions............................................................................................................................................... 52
Troubleshooting................................................................................................................................................................. 52
Chapter 5: Technology and components...................................................................................... 54
Chipsets...............................................................................................................................................................................54
Identifying the chipset in Device Manager on Windows 10...............................................................................54
Storage options................................................................................................................................................................. 54
Identifying the hard drive in Windows 10.............................................................................................................. 55
Entering BIOS setup................................................................................................................................................... 55
Memory configurations....................................................................................................................................................55
Verifying system memory in Windows 10 and Windows 7 ............................................................................... 55
DDR4.................................................................................................................................................................................... 55
Chapter 6: System setup.............................................................................................................58
Boot Sequence...................................................................................................................................................................58
Navigation keys..................................................................................................................................................................58
System setup options.......................................................................................................................................................59
System setup options.......................................................................................................................................................59
General screen options.............................................................................................................................................. 59
System configuration screen options..................................................................................................................... 60
Security screen options.............................................................................................................................................. 61
Secure boot screen options...................................................................................................................................... 62
Intel Software Guard Extensions options.............................................................................................................. 63
Performance screen options.....................................................................................................................................63
Power management screen options....................................................................................................................... 63
POST behavior screen options.................................................................................................................................64
Virtualization support screen options.....................................................................................................................65
Maintenance screen options.....................................................................................................................................65
System Log screen options.......................................................................................................................................65
Updating the BIOS ...........................................................................................................................................................66
System and setup password...........................................................................................................................................66
Assigning a system setup password....................................................................................................................... 66
Deleting or changing an existing system setup password................................................................................. 67
Chapter 7: Troubleshooting your computer................................................................................. 68
Enhanced Pre-Boot System Assessment — ePSA diagnostics............................................................................ 68
Running the ePSA Diagnostics.................................................................................................................................68
LCD built in self test - BIST............................................................................................................................................68
Chapter 8: Technical specifications............................................................................................. 72
Processors...........................................................................................................................................................................72
Skylake — 6th Generation Intel Core processors............................................................................................... 73
Kaby Lake — 7th Generation Intel Core processors.......................................................................................... 73
Identifying processors in Windows 10.....................................................................................................................74
Identifying processors in Windows 7.......................................................................................................................74
Memory specifications..................................................................................................................................................... 74
Contents 5

Video specifications.......................................................................................................................................................... 74
Audio specifications.......................................................................................................................................................... 74
Communication specifications........................................................................................................................................75
Cards specifications..........................................................................................................................................................75
Display specifications....................................................................................................................................................... 75
Drives specifications.........................................................................................................................................................75
Port and connector specifications................................................................................................................................ 75
Power specifications.........................................................................................................................................................76
Camera specifications - optional................................................................................................................................... 76
VESA wall mount .............................................................................................................................................................. 76
Physical specifications......................................................................................................................................................77
Environmental specifications.......................................................................................................................................... 77
Chapter 9: Contacting Dell.......................................................................................................... 78
6 Contents

Working on your computer
Topics:
•Before working inside your computer
•Safety instructions
•Recommended tools
•Turning off your computer
•After working inside your computer
•Important Information
Before working inside your computer
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
1. Save and close all open files and exit all open applications.
2. Shut down your computer. For Windows operating system, 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 the following conditions exist:
●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
CAUTION: Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by
your warranty. Read and follow the safety instructions that came with the product.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically
touching an unpainted metal surface at the same time as touching 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
1
Working on your computer 7

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: 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: 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.
Recommended tools
The procedures in this document require the following tools:
●Small flat blade screwdriver
●Phillips # 1 screwdriver
●Small plastic scribe
Turning off your computer
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. Turning off your computer (Windows 8.1):
●Using a touch enabled device:
a. Swipe in from the right edge of the screen, opening the Charms menu and select Settings.
b. Select and then select Shut down.
or
a. On the Home screen, touch and then select Shut down.
●Using a mouse:
a. Point to upper-right corner of the screen and click Settings.
b. Click and then select Shut down.
or
a. On the Home screen, click and then select Shut down.
2. Turning off your computer (Windows 7):
a. Click Start .
b. Click Shut Down.
or
a. Click Start .
b. Click the arrow in the lower-right corner of the Start menu, and then click Log off.
3. 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 6 seconds to
turn them off.
8Working on your computer

Turning off your — Windows
CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your
computer .
1. Click or tap .
2. Click or tap and then click or tap Shut down.
NOTE: 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 6 seconds
to turn them off.
After working inside your computer
NOTE: 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, 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.
Important Information
NOTE: Avoid using the touchscreen in dusty, hot, or humid environments.
NOTE: Sudden change in temperature may cause condensation on the inner surface of the glass screen, which will
disappear after a short time and does not affect normal usage.
Working on your computer 9

Chassis overview
Topics:
•System front chassis view
•System left chassis view
•System right chassis view
•System top chassis view
•Rear View
System front chassis view
1. Camera
2. Camera status light
3. Power status light
NOTE: For more information on ports and connectors, go to www.dell.com/support and search for OptiPlex 5250 AIO:
Visual Guide to your computer.
2
10 Chassis overview

System left chassis view
1. Media card reader 2. USB 3.1 Gen 1-port Type C
3. USB 3.1 port with PowerShare 4. Headset Connector
Chassis overview 11

System right chassis view
1. Optical drive 2. On Screen Display (OSD) buttons
3. On Screen Display (OSD) buttons 4. On Screen Display (OSD) buttons
5. Hard drive status light 6. Power button power light
7. Stand
12 Chassis overview

System top chassis view
1. Microphone
2. Camera privacy latch
3. Microphone
Chassis overview 13

Rear View
1. Power connecting port. 2. RJ45 network port.
3. USB 2.0 4. HDMI IN
5. USB 3.0 6. HDMI OUT
7. Display port 8. Audio Output
14 Chassis overview

Disassembly and reassembly
Topics:
•Stand
•Cable cover
•Side Cover
•Optical drive
•Power and On-Screen Display buttons board
•Speaker cover
•Hard drive
•System board shield
•Memory modules
•Solid State Drive
•Coin-cell battery
•WLAN card
•Heat sink
•Speaker
•Power supply unit
•VESA mount bracket
•Converter board
•System fan
•Intrusion switch
•Processor
•System board
•Chassis frame
•Display panel
•Camera
Stand
Removing the stand
NOTE: The system is shipped with three different types of stands:
●Height Adjustable Stand
●Basic Stand
●Articulating Stand
The removal procedure is the same for all the three stands.
1. Follow the procedure in Before working inside your computer.
2. Place the computer on clean, flat surface with the display facing downward.
3. To remove the stand:
a. Press the tab on the cover to release the stand [1].
b. Lift the stand upward [2].
NOTE: Each of the three stands will attach and detach in the same manner.
3
Disassembly and reassembly 15

Figure 1. Height Adjustable Stand
Figure 2. Fix stand
16 Disassembly and reassembly

Figure 3. Articulate stand
Installing the stand
1. Place the computer on a clean, flat surface and align the stand, and then slide it on the back of the computer.
2. Press the stand down till it snaps in.
3. Follow the procedure in After working inside your computer.
Cable cover
Removing the cable cover
1. Follow the procedure in Before working inside your computer.
2. Remove the stand.
3. To remove the cable cover:
a. Remove the screw that secures the cable cover to the computer [1].
b. Push the release tabs to release the cable cover [2].
c. Lift the cable cover away from the computer [3].
Disassembly and reassembly 17

Installing the cable cover
1. Align the notches on the cable cover to the holes on the computer and press the cable cover until it snaps in.
2. Tighten the screw to secure the cable cover to the computer.
3. Install the stand.
4. Follow the procedure in After working inside your computer.
Side Cover
Removing the back cover
1. Follow the procedure in Before working inside your computer.
2. Remove the:
a. stand
b. cable cover
3. Pry the edges of the back cover from the bottom to release it from the computer.
18 Disassembly and reassembly

4. Lift the back cover from the computer.
Installing the back cover
1. Align the notches on the back cover to the holes on the computer, and press the back cover until it snaps in.
2. Install the:
a. cable cover
b. stand
Disassembly and reassembly 19

3. Follow the procedure in After working inside your computer.
Optical drive
Removing the optical drive assembly
1. Follow the procedure in Before working inside your computer.
2. Remove the:
a. stand
b. back cover
3. To remove the optical drive assembly:
a. Press the securing tab at the base of the drive to release the optical drive assembly [1].
b. Slide the optical drive assembly to remove it away from the computer [3][2].
4. To remove the optical drive bracket:
a. Remove the screws that secure the optical drive bracket [1].
b. Remove the bracket away from the optical drive [2].
20 Disassembly and reassembly