Dell Inspiron 24 5421 User manual

Inspiron 24 5421 All-in-One
Owner's Manual
Regulatory Model: W29C
Regulatory Type: W29C001
March 2023
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.
© 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: Views of Inspiron 24 5421 All-in-One.............................................................................7
Right....................................................................................................................................................................................... 8
Front....................................................................................................................................................................................... 9
Bottom..................................................................................................................................................................................10
Back....................................................................................................................................................................................... 11
Back panel............................................................................................................................................................................12
Service Tag..........................................................................................................................................................................13
Retractable camera .......................................................................................................................................................... 13
Tilt..........................................................................................................................................................................................15
Inside view of your computer.......................................................................................................................................... 17
Retractable camera............................................................................................................................................................17
Chapter 2: Set up your computer................................................................................................. 19
Chapter 3: Specifications of Inspiron 24 5421 All-in-One............................................................. 25
Dimensions and weight.................................................................................................................................................... 25
Stand.................................................................................................................................................................................... 25
Processor.............................................................................................................................................................................27
Chipset.................................................................................................................................................................................28
Operating system.............................................................................................................................................................. 28
Memory................................................................................................................................................................................28
External ports.....................................................................................................................................................................29
Internal slots....................................................................................................................................................................... 29
Ethernet...............................................................................................................................................................................30
Wireless module.................................................................................................................................................................30
Audio.....................................................................................................................................................................................30
Storage................................................................................................................................................................................. 31
Media-card reader............................................................................................................................................................. 31
Camera.................................................................................................................................................................................32
Power adapter....................................................................................................................................................................32
Display.................................................................................................................................................................................. 33
GPU—Integrated.............................................................................................................................................................. 34
GPU—Discrete.................................................................................................................................................................. 34
Environmental.................................................................................................................................................................... 34
Regulatory compliance.....................................................................................................................................................35
Operating and storage environment.............................................................................................................................35
Dell Support policy............................................................................................................................................................ 36
Chapter 4: Working inside your computer.................................................................................... 37
Safety instructions............................................................................................................................................................ 37
Before working inside your computer.....................................................................................................................37
Safety precautions...................................................................................................................................................... 38
Electrostatic discharge—ESD protection............................................................................................................. 38
ESD field service kit ...................................................................................................................................................39
Contents
Contents 3

Transporting sensitive components........................................................................................................................40
After working inside your computer....................................................................................................................... 40
BitLocker....................................................................................................................................................................... 40
Recommended tools......................................................................................................................................................... 40
Screw list..............................................................................................................................................................................41
Major components of Inspiron 24 5421 All-in-One....................................................................................................42
Chapter 5: Removing and installing Customer Replaceable Units (CRUs).................................... 45
Stand.................................................................................................................................................................................... 45
Removing the stand....................................................................................................................................................45
Installing the stand......................................................................................................................................................46
Back cover.......................................................................................................................................................................... 47
Removing the back cover..........................................................................................................................................47
Installing the back cover............................................................................................................................................ 48
I/O cover.............................................................................................................................................................................49
Removing the I/O cover............................................................................................................................................ 49
Installing the I/O cover.............................................................................................................................................. 50
Stand hinges........................................................................................................................................................................51
Removing the stand hinges....................................................................................................................................... 51
Installing the stand hinges.........................................................................................................................................52
System-board shield.........................................................................................................................................................53
Removing the system-board shield.........................................................................................................................53
Installing the system-board shield...........................................................................................................................54
Hard drive........................................................................................................................................................................... 55
Removing the hard drive........................................................................................................................................... 55
Installing the hard drive............................................................................................................................................. 56
Solid-state drive................................................................................................................................................................ 57
Removing the M.2 2230 solid-state drive............................................................................................................. 57
Installing the M.2 2230 solid-state drive............................................................................................................... 58
Removing the M.2 2280 solid-state drive.............................................................................................................60
Installing the M.2 2280 solid-state drive............................................................................................................... 60
Memory module................................................................................................................................................................. 62
Removing the memory module.................................................................................................................................62
Installing the memory module...................................................................................................................................63
Wireless card...................................................................................................................................................................... 64
Removing the wireless card......................................................................................................................................64
Installing the wireless card........................................................................................................................................ 65
Retractable-camera assembly........................................................................................................................................66
Removing the retractable-camera assembly........................................................................................................ 66
Installing the retractable-camera assembly...........................................................................................................67
Fan........................................................................................................................................................................................ 67
Removing the fan........................................................................................................................................................ 67
Installing the fan.......................................................................................................................................................... 68
Speakers..............................................................................................................................................................................69
Removing the speakers..............................................................................................................................................69
Installing the speakers................................................................................................................................................ 70
Coin-cell battery................................................................................................................................................................. 71
Removing the coin-cell battery.................................................................................................................................71
Installing the coin-cell battery.................................................................................................................................. 72
4Contents

Chapter 6: Removing and installing Field Replaceable Units (FRUs)............................................ 74
Heat sink (integrated graphics)..................................................................................................................................... 74
Removing the heat sink..............................................................................................................................................74
Installing the heat sink................................................................................................................................................75
Heat sink (discrete graphics)......................................................................................................................................... 76
Removing the heat sink..............................................................................................................................................76
Installing the heat sink................................................................................................................................................ 77
Media-card reader.............................................................................................................................................................78
Removing the media-card reader............................................................................................................................ 78
Installing the media-card reader.............................................................................................................................. 79
Power-button board with USB...................................................................................................................................... 80
Removing the power-button board with USB......................................................................................................80
Installing the power-button board with USB.........................................................................................................81
System board..................................................................................................................................................................... 83
Removing the system board..................................................................................................................................... 83
Installing the system board....................................................................................................................................... 86
Microphones.......................................................................................................................................................................89
Removing the microphones...................................................................................................................................... 89
Installing the microphones........................................................................................................................................ 90
Antennas..............................................................................................................................................................................92
Removing the antennas............................................................................................................................................. 92
Installing the antennas............................................................................................................................................... 93
Display panel.......................................................................................................................................................................94
Removing the display panel.......................................................................................................................................94
Installing the display panel.........................................................................................................................................96
Middle frame assembly.....................................................................................................................................................97
Removing the mid-frame assembly with antennas............................................................................................. 97
Installing the mid-frame assembly with antennas............................................................................................... 99
Chapter 7: Software................................................................................................................... 101
Operating system............................................................................................................................................................. 101
Drivers and downloads.................................................................................................................................................... 101
Chapter 8: BIOS setup............................................................................................................... 102
Entering BIOS setup program.......................................................................................................................................102
Navigation keys................................................................................................................................................................ 102
One time boot menu....................................................................................................................................................... 102
System setup options..................................................................................................................................................... 103
Updating the BIOS............................................................................................................................................................ 111
Updating the BIOS in Windows................................................................................................................................111
Updating the BIOS using the USB drive in Windows..........................................................................................111
Updating the BIOS in Linux and Ubuntu............................................................................................................... 112
Updating the BIOS from the One Time Boot menu............................................................................................112
System and setup password..........................................................................................................................................113
Assigning a system setup password...................................................................................................................... 113
Deleting or changing an existing system setup password................................................................................ 113
Clearing CMOS settings................................................................................................................................................. 114
Clearing BIOS (System Setup) and System passwords..........................................................................................114
Contents 5

Chapter 9: Troubleshooting........................................................................................................ 115
Dell SupportAssist Pre-boot System Performance Check diagnostics...............................................................115
Running the SupportAssist Pre-Boot System Performance Check............................................................... 115
System-diagnostic lights................................................................................................................................................ 115
Recovering the operating system.................................................................................................................................117
Backup media and recovery options............................................................................................................................ 117
WiFi power cycle...............................................................................................................................................................118
Chapter 10: Getting help and contacting Dell..............................................................................119
6 Contents

1
Views of Inspiron 24 5421 All-in-One 7

Views of Inspiron 24 5421 All-in-One
Right
8 Views of Inspiron 24 5421 All-in-One

1. USB 3.2 Gen 2 Type-C port
Connect devices such as external storage devices and printers.
Provides data transfer speeds up to 10 Gbps. PowerShare enables you to charge connected USB devices.
NOTE: Connected USB devices will not charge when the computer is turned off or in sleep state. Turn on the computer
to charge the connected USB devices.
Front
1. Retractable-camera assembly
Enables you to videochat, capture photos, and record videos. This camera can be retracted to protect your privacy.
2. Display panel
Provides visual output to the user.
3. Speakers
Provides audio output.
Views of Inspiron 24 5421 All-in-One 9

Bottom
1. Power button
Press to turn on the computer if it is turned off, in sleep state, or in hibernate state.
When the computer is turned on, press the power button to put the computer into sleep state; press and hold the power
button for 10 seconds to force shut-down the computer.
NOTE: You can customize the power-button behavior in Windows.
2. Display Built-in Self Test button/Input-source selection button
This button has two functions:
●When the computer is on, use this button to select the video input-source.
Press the button to switch the display between the internal system display and HDMI input.
●When the computer is off (there is no power; neither is it in sleep state nor hibernate state), use this button to run the
built-in self-test for the display.
Press and hold down this button, and then press the power button to turn on the computer. The built-in color pattern for
the LCD monitor will appear on the screen.
For more information, see the Troubleshooting section in the Service Manual at www.dell.com/support/manuals.
3. Service Tag label
The Service Tag is a unique alphanumeric identifier that enables Dell service technicians to identify the hardware
components in your computer and access warranty information.
10 Views of Inspiron 24 5421 All-in-One

Back
1. Back cover
Removable chassis.
2. Back panel
Connect USB, audio, video, and other devices.
3. Stand
Allows the system to be mounted vertically.
For more information on the rear ports, see Back panel.
Views of Inspiron 24 5421 All-in-One 11

Back panel
1. USB 3.2 Gen 1 port with Power on/Wake-up support (2)
Connect peripherals such as external storage devices and printers. Provides data transfer speeds up to 5 Gbps. Wake the
computer from standby with the keyboard or mouse connected to this port.
NOTE: Set the BIOS Deep Sleep control to disabled to enable Wake up when the computer is powered off.
2. HDMI-in port
Connect a gaming console, Blu-ray player, or other HDMI-out enabled device.
3. HDMI port
Connect to a TV, external display or another HDMI-in enabled device. Provides video and audio output.
4. Power-adapter port
Connect a power adapter to provide power to your computer.
5. Network port
Connect an Ethernet (RJ45) cable from a router or a broadband modem for network or Internet access, with a transfer rate
of 10/100/1000 Mbps.
6. USB 3.2 Gen 2 port with PowerShare
Connect peripherals such as external storage devices and printers.
Provides data transfer speeds up to 10 Gbps. PowerShare enables you to charge connected USB devices.
NOTE: Connected USB devices will not charge when the computer is turned off. Please set BIOS Deep Sleep control to
disabled to start charging when the computer is powered off.
7. USB 3.2 Gen 1 port with Power on/Wake-up support
Connect peripherals such as external storage devices and printers. Provides data transfer speeds up to 5 Gbps. Wake the
computer from standby with the keyboard or mouse connected to this port.
NOTE: Set the BIOS Deep Sleep control to disabled to enable Wake up when the computer is powered off.
8. Universal audio jack
12 Views of Inspiron 24 5421 All-in-One

Connect audio-output devices such as speakers, amplifiers, and so on.
9. SD-card slot
Reads from and writes to the SD card. The computer supports the following card types:
●Secure Digital (SD)
●Secure Digital High Capacity (SDHC)
●Secure Digital Extended Capacity (SDXC)
Service Tag
The service tag is a unique alphanumeric identifier that allows Dell service technicians to identify the hardware components in
your computer and access warranty information.
Retractable camera
Retractable camera for computers shipped with FHD RGB + IR camera
Views of Inspiron 24 5421 All-in-One 13

1. Infrared emitter
Emits infrared light, which enables the infrared camera to sense and track motion.
2. Infrared camera
Enhances security when paired with Windows Hello face authentication.
3. Camera
Enables you to video chat, capture photos, and record videos.
4. Infrared emitter
Emits infrared light, which enables the infrared camera to sense and track motion.
5. Camera-status light
Turns on when the camera is in use.
Retractable camera for computers shipped with FHD RGB camera
1. Camera
Enables you to video chat, capture photos, and record videos.
2. Camera-status light
Turns on when the camera is in use.
14 Views of Inspiron 24 5421 All-in-One

Tilt
Y stand
Views of Inspiron 24 5421 All-in-One 15

Isosceles stand
16 Views of Inspiron 24 5421 All-in-One

Inside view of your computer
1. Heat sink
2. Fan
3. Speakers
4. Media-card reader
5. System board
6. Microphone module
7. Wireless-card slot
8. Power-button board
9. Hard-disk drive
10. Display panel
11. Display-assembly base
12. Solid-state drive slot
13. Camera module
14. Coin-cell battery
15. Memory module
Retractable camera
Push the top of camera to extend or retract the camera. Extend the camera before use and retract the camera to protect your
privacy when not in use.
Views of Inspiron 24 5421 All-in-One 17

18 Views of Inspiron 24 5421 All-in-One

Set up your computer
Steps
1. Set up the stand by inserting it into the slot on the back cover until it snaps into place.
2. Connect the keyboard and mouse.
NOTE: To connect your wireless keyboard and mouse, find User Guides and other resources for your products at
https://www.dell.com/support
2
Set up your computer 19

3. Connect to your network using a cable.
20 Set up your computer