Dell NOT21684 User manual

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Informacije o proizvodu (EN)
DELL laptop Latitude 5540 (NOT21684)
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Latitude 5540
Owner's Manual
Regulatory Model: P127F
Regulatory Type: P127F001
October 2023
Rev. A02
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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.
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Chapter 1: Views of Latitude 5540................................................................................................. 8
Right....................................................................................................................................................................................... 8
Left..........................................................................................................................................................................................9
Top.........................................................................................................................................................................................10
Front...................................................................................................................................................................................... 11
Back.......................................................................................................................................................................................12
Bottom..................................................................................................................................................................................12
Service Tag..........................................................................................................................................................................13
Battery charge and status light .....................................................................................................................................13
Chapter 2: Set up your Latitude 5540.......................................................................................... 14
Chapter 3: Specifications of Latitude 5540.................................................................................. 16
Dimensions and weight.....................................................................................................................................................16
Processor............................................................................................................................................................................. 16
Chipset..................................................................................................................................................................................18
Operating system...............................................................................................................................................................18
Memory.................................................................................................................................................................................18
External ports......................................................................................................................................................................19
Internal slots........................................................................................................................................................................19
Ethernet...............................................................................................................................................................................20
Wireless module.................................................................................................................................................................20
WWAN module...................................................................................................................................................................20
Audio.....................................................................................................................................................................................22
Storage................................................................................................................................................................................ 22
Media-card reader ........................................................................................................................................................... 23
Keyboard..............................................................................................................................................................................23
Keyboard function keys................................................................................................................................................... 23
Camera.................................................................................................................................................................................24
Touchpad.............................................................................................................................................................................25
Power adapter................................................................................................................................................................... 25
Battery................................................................................................................................................................................. 26
Display.................................................................................................................................................................................. 28
Fingerprint reader (optional).......................................................................................................................................... 29
Sensor .................................................................................................................................................................................29
GPU—Integrated.............................................................................................................................................................. 29
GPU—Discrete.................................................................................................................................................................. 30
External display support.................................................................................................................................................. 30
Hardware security.............................................................................................................................................................30
Smart-card reader............................................................................................................................................................. 31
Contactless smart-card reader.................................................................................................................................31
Contacted smart-card reader...................................................................................................................................32
Operating and storage environment.............................................................................................................................33
Dell Support policy............................................................................................................................................................ 33
Contents
Contents 3
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ComfortView Plus............................................................................................................................................................. 33
Using the privacy shutter................................................................................................................................................ 34
Dell Optimizer.....................................................................................................................................................................34
Chapter 4: Working inside your computer....................................................................................36
Safety instructions............................................................................................................................................................36
Before working inside your computer.....................................................................................................................36
Safety precautions...................................................................................................................................................... 37
Electrostatic discharge—ESD protection............................................................................................................. 37
ESD field service kit ...................................................................................................................................................38
Transporting sensitive components........................................................................................................................39
After working inside your computer....................................................................................................................... 39
BitLocker....................................................................................................................................................................... 39
Recommended tools......................................................................................................................................................... 39
Screw list.............................................................................................................................................................................40
Major components of Latitude 5540.............................................................................................................................41
Chapter 5: Removing and installing Customer Replaceable Units (CRUs).................................... 44
SIM card tray (Optional) ................................................................................................................................................ 44
Removing the SIM card tray (Optional).................................................................................................................44
Installing the SIM card tray (Optional)...................................................................................................................45
Base cover.......................................................................................................................................................................... 46
Removing the base cover..........................................................................................................................................46
Installing the base cover............................................................................................................................................ 48
Wireless card.......................................................................................................................................................................51
Removing the WLAN card......................................................................................................................................... 51
Installing the WLAN card...........................................................................................................................................52
WWAN card (Optional)....................................................................................................................................................53
Removing the 4G WWAN card (Optional)............................................................................................................ 53
Installing the 4G WWAN card (Optional).............................................................................................................. 54
Removing the 5G WWAN card (Optional)............................................................................................................ 56
Installing the 5G WWAN card (Optional).............................................................................................................. 57
Memory modules............................................................................................................................................................... 58
Removing the memory module.................................................................................................................................58
Installing the memory module...................................................................................................................................59
Solid-state drive................................................................................................................................................................ 60
Removing the M.2 2230 solid-state drive from Slot 1....................................................................................... 60
Installing the M.2 2230 solid-state drive in Slot 1................................................................................................ 61
Removing the M.2 2280 solid-state drive from Slot 1........................................................................................63
Installing the M.2 2280 solid-state drive in Slot 1............................................................................................... 64
Removing the M.2 2230 solid-state drive from Slot 2.......................................................................................65
Installing the M.2 2230 solid-state drive in Slot 2...............................................................................................66
Fan........................................................................................................................................................................................ 67
Removing the fan........................................................................................................................................................ 67
Installing the fan.......................................................................................................................................................... 67
Chapter 6: Removing and installing Field Replaceable Units (FRUs)............................................ 69
Battery................................................................................................................................................................................. 69
Rechargeable Li-ion battery precautions...............................................................................................................69
4Contents
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Removing the battery.................................................................................................................................................69
Installing the battery....................................................................................................................................................71
Assembly inner frame....................................................................................................................................................... 73
Removing the assembly-inner frame...................................................................................................................... 73
Installing the assembly-inner frame.........................................................................................................................74
Speakers.............................................................................................................................................................................. 76
Removing the speakers..............................................................................................................................................76
Installing the speakers................................................................................................................................................ 77
Coin-cell battery................................................................................................................................................................ 78
Removing the coin-cell battery................................................................................................................................78
Installing the coin-cell battery.................................................................................................................................. 79
Heat sink..............................................................................................................................................................................80
Removing the heat sink (Discrete GPU)............................................................................................................... 80
Installing the heat sink (Discrete GPU).................................................................................................................. 81
Removing the heat sink (Integrated GPU)............................................................................................................82
Installing the heat sink (Integrated GPU)..............................................................................................................83
System board..................................................................................................................................................................... 84
Removing the system board..................................................................................................................................... 84
Installing the system board....................................................................................................................................... 87
Power button..................................................................................................................................................................... 90
Removing the power button.....................................................................................................................................90
Installing the power button........................................................................................................................................91
Power button with optional fingerprint reader.......................................................................................................... 92
Removing the power button with optional fingerprint reader..........................................................................92
Installing the power button with optional fingerprint reader............................................................................ 93
Keyboard............................................................................................................................................................................. 94
Removing the keyboard............................................................................................................................................. 94
Installing the keyboard............................................................................................................................................... 96
Display assembly................................................................................................................................................................98
Removing the display assembly............................................................................................................................... 98
Installing the display assembly.................................................................................................................................101
Display bezel..................................................................................................................................................................... 103
Removing the display bezel..................................................................................................................................... 103
Installing the display bezel....................................................................................................................................... 103
Display panel..................................................................................................................................................................... 104
Removing the display panel.....................................................................................................................................104
Installing the display panel....................................................................................................................................... 107
Camera module................................................................................................................................................................. 110
Removing the camera module................................................................................................................................. 110
Installing the camera module.................................................................................................................................... 111
Display hinges....................................................................................................................................................................112
Removing the display hinges....................................................................................................................................112
Installing the display hinges......................................................................................................................................113
Display back cover............................................................................................................................................................114
Removing the display back cover........................................................................................................................... 114
Installing the display back cover............................................................................................................................. 115
Display cable...................................................................................................................................................................... 116
Removing the display cable......................................................................................................................................116
Installing the display cable........................................................................................................................................ 117
Sensor board......................................................................................................................................................................118
Contents 5
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Removing the sensor board..................................................................................................................................... 118
Installing the sensor board....................................................................................................................................... 119
Fingerprint reader (Optional)........................................................................................................................................120
Removing the fingerprint reader (Optional)........................................................................................................120
Installing the fingerprint reader (Optional)...........................................................................................................121
Smart-card reader........................................................................................................................................................... 123
Removing the smart-card reader...........................................................................................................................123
Installing the smart-card reader.............................................................................................................................123
Dummy SIM-card slot filler............................................................................................................................................124
Removing the dummy SIM-card slot filler........................................................................................................... 124
Installing the dummy SIM-card slot filler..............................................................................................................125
Palm-rest assembly......................................................................................................................................................... 126
Removing the palm-rest assembly.........................................................................................................................126
Installing the palm-rest assembly...........................................................................................................................128
Chapter 7: Software...................................................................................................................130
Operating system............................................................................................................................................................ 130
Drivers and downloads................................................................................................................................................... 130
Chapter 8: BIOS Setup............................................................................................................... 131
Entering BIOS setup program........................................................................................................................................131
Navigation keys.................................................................................................................................................................131
F12 One Time Boot menu............................................................................................................................................... 131
System setup options..................................................................................................................................................... 132
Updating the BIOS...........................................................................................................................................................143
Updating the BIOS in Windows.............................................................................................................................. 143
Updating the BIOS in Linux and Ubuntu...............................................................................................................143
Updating the BIOS using the USB drive in Windows........................................................................................ 143
Updating the BIOS from the F12 One-Time boot menu................................................................................... 144
System and setup password......................................................................................................................................... 144
Assigning a System Setup password.................................................................................................................... 145
Deleting or changing an existing system setup password............................................................................... 145
Clearing CMOS settings.................................................................................................................................................146
Clearing BIOS (System Setup) and System passwords.........................................................................................146
Chapter 9: Troubleshooting........................................................................................................147
Handling swollen rechargeable Li-ion batteries........................................................................................................ 147
Locate the Service Tag or Express Service Code of your Dell computer ............................................ 147
Dell SupportAssist Pre-boot System Performance Check diagnostics.............................................................. 148
Running the SupportAssist Pre-Boot System Performance Check.............................................................. 148
Built-in self-test (BIST)..................................................................................................................................................148
M-BIST......................................................................................................................................................................... 148
LCD Power rail test (L-BIST)................................................................................................................................. 149
LCD Built-in Self Test (BIST)..................................................................................................................................149
System-diagnostic lights................................................................................................................................................150
Recovering the operating system................................................................................................................................ 151
Real-Time Clock (RTC Reset).......................................................................................................................................151
Backup media and recovery options............................................................................................................................151
Wi-Fi power cycle.............................................................................................................................................................151
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Drain residual flea power (perform hard reset)........................................................................................................ 151
Chapter 10: Getting help and contacting Dell............................................................................. 153
Contents 7
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Views of Latitude 5540
Right
1. microSD-card slot
Reads from and writes to the microSD-card.
2. Universal audio jack
Connect headphones or a headset (headphone and microphone combo).
3. USB 3.2 Gen 1 port
Connect devices such as external storage devices and printers. Provides data transfer speeds up to 5 Gbps.
4. USB 3.2 Gen 1 port with PowerShare
Connect devices such as external storage devices and printers.
Provides data transfer speeds up to 5 Gbps. PowerShare enables you to charge your USB devices even when your computer
is turned off.
NOTE: If the charge on your computer’s battery is less than 10 percent, you must connect the power adapter to charge
your computer, and USB devices connected to the PowerShare port.
NOTE: If a USB device is connected to the PowerShare port before the computer is turned off or in hibernate state,
you must disconnect and connect it again to enable charging.
NOTE: Certain USB devices may not charge when the computer is turned off or in sleep state. In such cases, turn on
the computer to charge the device.
5. HDMI 2.0 port
Connect to a TV, external display or another HDMI-in enabled device. Provides video and audio output.
6. Network port
Connect an Ethernet (RJ-45) cable from a router or a broadband modem for network or Internet access, with a transfer rate
of 10/100/1000 Mbps.
7. Security-cable slot (wedge-shaped)
Connect a security cable to prevent unauthorized movement of your computer.
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Left
1. Thunderbolt 4.0 port with Power Delivery and DisplayPort
Supports USB4, DisplayPort 1.4, Thunderbolt 4 and also enables you to connect to an external display using a display adapter.
Provides data transfer rates of up to 40 Gbps for USB4 and Thunderbolt 4.
NOTE: You can connect a Dell Docking Station to the Thunderbolt 4 ports. For more information, search in the
Knowledge Base Resource at www.dell.com/support.
NOTE: A USB Type-C to DisplayPort adapter (sold separately) is required to connect a DisplayPort device.
NOTE: USB4 is backward compatible with USB 3.2, USB 2.0, and Thunderbolt 3.
NOTE: Thunderbolt 4 supports two 4K displays or one 8K display.
2. Thunderbolt 4.0 port with Power Delivery and DisplayPort
Supports USB4, DisplayPort 1.4, Thunderbolt 4 and also enables you to connect to an external display using a display adapter.
Provides data transfer rates of up to 40 Gbps for USB4 and Thunderbolt 4.
NOTE: You can connect a Dell Docking Station to the Thunderbolt 4 ports. For more information, search in the
Knowledge Base Resource at www.dell.com/support.
NOTE: A USB Type-C to DisplayPort adapter (sold separately) is required to connect a DisplayPort device.
NOTE: USB4 is backward compatible with USB 3.2, USB 2.0, and Thunderbolt 3.
NOTE: Thunderbolt 4 supports two 4K displays or one 8K display.
3. Battery-status light
Indicates the battery-charge status.
Solid yellow—Battery charge is low.
Blinking yellow—Battery charge is critical.
4. Smart-card reader slot (optional)
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Top
1. Power button with optional fingerprint reader
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.
If the power button has a fingerprint reader, place your finger on the power button steadily to log in.
NOTE: The power-status light on the power button is available only on computers without the fingerprint reader.
Computers that are shipped with the fingerprint reader that is integrated on the power button will not have the
power-status light on the power button.
NOTE: You can customize the power-button behavior in Windows.
2. Keyboard
3. Fingerprint reader (optional)
Press your finger on the fingerprint reader to log in to your computer. The fingerprint reader enables your computer to
recognize your fingerprints as a password.
NOTE: Configure the fingerprint reader to register your fingerprint and enable access.
4. NFC/Contactless smart card reader (optional)
5. Touchpad
Move your finger on the touchpad to move the mouse pointer. Tap to left-click and two fingers tap to right-click.
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Front
1. Left microphone
Provides digital sound input for audio recording and voice calls.
2. Infrared emitter (optional)
Emits infrared light, which enables the infrared camera to sense and track motion.
3. Infrared camera (optional)
Enhances security when paired with Windows Hello face authentication.
4. Camera shutter
Slide the privacy shutter to the left to access the camera lens.
5. Camera
Enables you to video chat, capture photos, and record videos.
6. Camera-status light
Turns on when the camera is in use.
7. Ambient-light sensor
The sensor detects the ambient light and automatically adjusts the display brightness.
8. Right microphone
Provides digital sound input for audio recording and voice calls.
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Back
1. Nano-SIM card slot (optional)
Insert a nano-SIM card to connect to a mobile broadband network.
NOTE: Availability of the nano-SIM card slot depends on the region and configuration ordered.
Bottom
1. Speakers
Provide audio output.
2. 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.
3. Fan vents
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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.
Battery charge and status light
The following table lists the battery charge and status light behavior of your Latitude 5540.
Table 1. Battery charge and status light behavior
Power Source LED Behavior System Power State Battery Charge Level
AC Adapter Off S0 - S5 Fully Charged
AC Adapter Solid White S0 - S5 < Fully Charged
Battery Off S0 - S5 11-100%
Battery Solid Amber (590+/-3 nm) S0 - S5 < 10%
●S0 (ON) - System is turned on.
●S4 (Hibernate) - The system consumes the least power compared to all other sleep states. The system is almost at an OFF
state, expect for a trickle power. The context data is written to hard drive.
●S5 (OFF) - The system is in a shutdown state.
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Set up your Latitude 5540
About this task
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Steps
1. Connect the power adapter and press the power button.
NOTE: To conserve battery power, the battery might enter power saving mode. Connect the power adapter and press
the power button to turn on the computer.
2. Finish operating system setup.
For Ubuntu:
Follow the on-screen instructions to complete the setup. For more information about installing and configuring Ubuntu,
search in the Knowledge Base Resource at www.dell.com/support.
For Windows:
Follow the on-screen instructions to complete the setup. When setting up, Dell recommends that you:
●Connect to a network for Windows updates.
NOTE: If connecting to a secured wireless network, enter the password for the wireless network access when
prompted.
●If connected to the internet, sign-in with or create a Microsoft account. If not connected to the internet, create an
offline account.
●On the Support and Protection screen, enter your contact details.
3. Locate and use Dell apps from the Windows Start menu—Recommended.
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Table 2. Locate Dell apps
Resources Description
Dell Product Registration
Register your computer with Dell.
Dell Help & Support
Access help and support for your computer.
SupportAssist
SupportAssist is the smart technology that keeps your computer running at its best by optimizing
settings, detecting issues, removing viruses and notifies when you need to make system
updates. SupportAssist proactively checks the health of your system's hardware and software.
When an issue is detected, the necessary system state information is sent to Dell to begin
troubleshooting. SupportAssist is preinstalled on most of the Dell devices running Windows
operating system. For more information, see SupportAssist for Home PCs User's Guide on
www.dell.com/serviceabilitytools.
NOTE: In SupportAssist, click the warranty expiry date to renew or upgrade your warranty.
Dell Update
Updates your computer with critical fixes and latest device drivers as they become available. For
more information on using Dell Update, search in the Knowledge Base Resource at www.dell.com/
support.
Dell Digital Delivery
Download software applications, which are purchased but not preinstalled on your computer.
For more information on using Dell Digital Delivery, search in the Knowledge Base Resource at
www.dell.com/support.
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Specifications of Latitude 5540
Dimensions and weight
The following table lists the height, width, depth, and weight of your Latitude 5540.
Table 3. Dimensions and weight
Description Values
Height:
Front height 20.80 mm (0.82 in.)
Rear height 22.80 mm (0.90 in.)
Width 357.80 mm (14.09 in.)
Depth 233.30 mm (9.19 in.)
Weight
NOTE: The weight of your computer depends on the
configuration ordered and manufacturing variability.
1.613 kg (3.56 lb)
Processor
The following table lists the details of the processors supported by your Latitude 5540.
3
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Table 4. Processor
Description Option one Option two Option three Option four Option
five
Option six Option
seven
Option
eight
Processor
type 13th
Generation
Intel Core
i3-1315U
13th
Generation
Intel Core
i5-1335U
13th
Generation
Intel Core
i5-1345U
vPro
13th
Generation
Intel Core
i5-1340P
13th
Generation
Intel Core
i5-1350P
vPro
13th
Generation
Intel Core
i7-1355U
13th
Generation
Intel Core
i7-1365U
vPro
13th
Generation
Intel Core
i7-1370P
vPro
Processor
wattage 15 W 15 W 15 W 28 W 28 W 15 W 15 W 28 W
Processor
total core
count
6 10 10 12 12 10 10 14
Performance
-cores 2 2 2 4 4 2 2 6
Efficient-
cores 4 8 8 8 8 8 8 8
Processor
total thread
counts
8 12 12 16 16 12 12 20
NOTE: Intel® Hyper-Threading Technology is only available on Performance-cores.
Processor
speed Up to 4.50
GHz
Up to 4.60
GHz
Up to 4.70
GHz
Up to 4.60
GHz
Up to 4.70
GHz
Up to 5
GHz
Up to 5.20
GHz
Up to 5.20
GHz
Performance-cores frequency
Processor
base
frequency
1.20 GHz 1.30 GHz 1.60 GHz 1.90 GHz 1.90 GHz 1.70 GHz 1.80 GHz 1.90 GHz
Maximum
turbo
frequency
4.50 GHz 4.60 GHz 4.70 GHz 4.60 GHz 4.70 GHz 5 GHz 5.20 GHz 5.20 GHz
Efficient-cores frequency
Processor
base
frequency
0.90 GHz 0.90 GHz 1.20 GHz 1.40 GHz 1.40 GHz 1.20 GHz 1.30 GHz 1.40 GHz
Maximum
turbo
frequency
3.30 GHz 3.40 GHz 3.50 GHz 3.40 GHz 3.50 GHz 3.70 GHz 3.90 GHz 3.90 GHz
Processor
cache 10 MB 12 MB 12 MB 12 MB 12 MB 12 MB 12 MB 24 MB
Integrated
graphics Intel UHD
Graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
Intel Iris Xe
Graphics
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Chipset
The following table lists the details of the chipset supported by your Latitude 5540.
Table 5. Chipset
Description Values
Chipset Integrated in the processor
Processor 13th Generation Intel Core i3/i5/i7
DRAM bus width 64-bit
Flash EPROM 32 MB for non-vPro, 32 MB + 16 MB for vPro/vPro Essentials
PCIe bus Up to Gen 4
Operating system
Your Latitude 5540 supports the following operating systems:
●Windows 11 Home, 64-bit
●Windows 11 Pro, 64-bit
●Windows 11 Pro downgrade (Win 10 Pro image FI + Win 11 Pro DPK)
●Ubuntu 22.04 LTS, 64-bit
Memory
The following table lists the memory specifications of your Latitude 5540.
Table 6. Memory specifications
Description Values
Memory slots Two-SODIMM slots
Memory type ●Single-channel DDR4
●Dual-channel DDR4
●Single-channel DDR5
●Dual-channel DDR5
Memory speed ●3200 MT/s
●4800 MT/s
●5200 MT/s
Maximum memory configuration 64 GB
Minimum memory configuration 8 GB
Memory size per slot 8 GB, 16 GB, or 32 GB
Memory configurations supported ●8 GB, 1 x 8 GB, DDR4, 3200 MT/s, single-channel
●16 GB, 2 x 8 GB, DDR4, 3200 MT/s, dual-channel
●16 GB, 1 x 16 GB, DDR4, 3200 MT/s, single-channel
●32 GB, 2 x 16 GB, DDR4, 3200 MT/s, dual-channel
●64 GB, 2 x 32 GB, DDR4, 3200 MT/s, dual-channel
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Table 6. Memory specifications(continued)
Description Values
●8 GB, 1 x 8 GB, DDR5, 4800 MT/s, single-channel
●16 GB, 2 x 8 GB, DDR5, 4800 MT/s, dual-channel
●16 GB, 1 x 16 GB, DDR5, 4800 MT/s, single-channel
●32 GB, 2 x 16 GB, DDR5, 4800 MT/s, dual-channel
●64 GB, 2 x 32 GB, DDR5, 4800 MT/s, dual-channel
●8 GB, 1 x 8 GB, DDR5, 5200 MT/s, single-channel
●16 GB, 2 x 8 GB, DDR5, 5200 MT/s, dual-channel
●16 GB, 1 x 16 GB, DDR5, 5200 MT/s, single-channel
●32 GB, 2 x 16 GB, DDR5, 5200 MT/s, dual-channel
●64 GB, 2 x 32 GB, DDR5, 5200 MT/s, dual-channel
External ports
The following table lists the external ports of your Latitude 5540.
Table 7. External ports
Description Values
Network port One RJ-45 port
USB ports ●Two Thunderbolt 4 port Power Delivery and DisplayPort
NOTE: You can connect a Dell Docking Station to this
port. For more information, search in the Knowledge
Base Resource at www.dell.com/support.
●One USB 3.2 Gen 1 port with PowerShare
●One USB 3.2 Gen 1 port
Audio port One Universal audio jack
Video port One HDMI 2.0 port
Media-card reader One microSD-card slot
Power-adapter port USB Type-C power input
Security-cable slot One security-cable slot (wedge-shaped)
Internal slots
The following table lists the internal slots of your Latitude 5540.
Table 8. Internal slots
Description Values
M.2 ●One M.2 2230 slot for WiFi and Bluetooth combo card
●One M.2 2230/2280 slot for solid-state drive
●One M.2 2230 slot for solid-state drive
●One M.2 3042/3052 for WWAN card
NOTE: To learn more about the features of different
types of M.2 cards, search in the Knowledge Base
Resource at www.dell.com/support.
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