Table of Contents
- Vostro 3401 Service Manual
- Working on your computer
- Technology and components
- Exploded View
- Disassembly and reassembly
- Secure Digital Card
- Base cover
- Battery
- Memory modules
- WLAN card
- Solid-state drive
- Hard drive
- Coin-cell battery
- System fan
- Heat sink
- Speakers
- IO board
- Touchpad
- Display assembly
- Display bezel
- Camera
- Display panel
- Display back-cover and antenna assembly
- Power button
- System board
- Power-adapter port
- Palm-rest and keyboard assembly
- Troubleshooting
- Getting help
DELL 3401 User Manual
Displayed below is the user manual for 3401 by DELL which is a product in the Notebooks category. This manual has pages.
Related Manuals
Vostro 3401
Service Manual
Regulatory Model: P132G
Regulatory Type: P132G001
April 2021
Rev. A01
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.
© 2020-2021 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, 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........................................................................................... 6
Safety instructions.............................................................................................................................................................. 6
Before working inside your computer.......................................................................................................................6
Safety precautions.........................................................................................................................................................7
Electrostatic discharge—ESD protection................................................................................................................7
ESD field service kit ..................................................................................................................................................... 8
After working inside your computer..........................................................................................................................9
Chapter 2: Technology and components.......................................................................................10
USB features.......................................................................................................................................................................10
HDMI 1.4............................................................................................................................................................................... 12
Power button LED behavior............................................................................................................................................ 12
Chapter 3: Exploded View............................................................................................................ 15
Chapter 4: Disassembly and reassembly.......................................................................................18
Secure Digital Card............................................................................................................................................................ 18
Removing the Secure Digital card............................................................................................................................18
Installing the Secure Digital card..............................................................................................................................19
Base cover.......................................................................................................................................................................... 20
Removing the base cover..........................................................................................................................................20
Installing the base cover............................................................................................................................................ 22
Battery................................................................................................................................................................................. 24
Lithium-ion battery precautions...............................................................................................................................24
Disconnecting the battery......................................................................................................................................... 24
Reconnecting the battery......................................................................................................................................... 25
Removing the battery.................................................................................................................................................26
Installing the battery................................................................................................................................................... 27
Memory modules............................................................................................................................................................... 29
Removing the memory module.................................................................................................................................29
Installing the memory module...................................................................................................................................29
WLAN card..........................................................................................................................................................................30
Removing the WLAN card.........................................................................................................................................30
Installing the WLAN card............................................................................................................................................31
Solid-state drive................................................................................................................................................................ 32
Removing the M.2 2230 Solid-state drive............................................................................................................ 32
Installing the M.2 2230 Solid-state drive...............................................................................................................33
Removing the M.2 2280 Solid-state drive............................................................................................................ 34
Installing the M.2 2280 Solid-state drive.............................................................................................................. 35
Hard drive............................................................................................................................................................................36
Removing the hard drive assembly......................................................................................................................... 36
Installing the hard drive assembly............................................................................................................................37
Coin-cell battery................................................................................................................................................................ 39
Removing the coin-cell...............................................................................................................................................39
Contents
Contents 3
Installing the coin-cell battery..................................................................................................................................40
System fan..........................................................................................................................................................................40
Removing the system fan..........................................................................................................................................40
Installing the system fan.............................................................................................................................................41
Heat sink..............................................................................................................................................................................42
Removing the heatsink...............................................................................................................................................42
Installing the heatsink................................................................................................................................................. 43
Speakers.............................................................................................................................................................................. 44
Removing the speakers..............................................................................................................................................44
Installing the speakers................................................................................................................................................45
IO board............................................................................................................................................................................... 46
Removing the IO board.............................................................................................................................................. 46
Installing the IO board.................................................................................................................................................47
Touchpad.............................................................................................................................................................................48
Removing the touch pad assembly......................................................................................................................... 48
Installing the touch pad assembly........................................................................................................................... 49
Display assembly................................................................................................................................................................ 51
Removing the display assembly................................................................................................................................ 51
Installing the display assembly..................................................................................................................................53
Display bezel.......................................................................................................................................................................55
Removing the display bezel...................................................................................................................................... 55
Installing the display bezel ....................................................................................................................................... 58
Camera...........................................................................................................................................................................59
Display panel..................................................................................................................................................................61
Display back-cover and antenna assembly........................................................................................................... 65
Camera.................................................................................................................................................................................66
Removing the camera................................................................................................................................................ 66
Installing the camera...................................................................................................................................................67
Display panel.......................................................................................................................................................................68
Removing the display panel...................................................................................................................................... 68
Installation display panel............................................................................................................................................ 70
Display back-cover and antenna assembly..................................................................................................................72
Removing the display back-cover............................................................................................................................72
Installing the display back-cover..............................................................................................................................73
Power button......................................................................................................................................................................73
Removing the power button..................................................................................................................................... 73
Installing the power button....................................................................................................................................... 74
System board..................................................................................................................................................................... 75
Removing the system board - Realtek audio........................................................................................................ 75
Installing the system board - Realtek audio.......................................................................................................... 78
Removing the system board - Cirrus Logic audio............................................................................................... 80
Installing the system board - Cirrus Logic audio..................................................................................................82
Power-adapter port..........................................................................................................................................................85
Removing the power adapter port..........................................................................................................................85
Installing the power adapter port............................................................................................................................ 86
Palm-rest and keyboard assembly.................................................................................................................................87
Removing the palmrest and keyboard assembly.................................................................................................. 87
Chapter 5: Troubleshooting.........................................................................................................89
Enhanced Pre-Boot System Assessment (ePSA) diagnostics...............................................................................89
4Contents
Running SupportAssist diagnostics.........................................................................................................................89
System diagnostic lights..................................................................................................................................................90
WiFi power cycle................................................................................................................................................................ 91
Chapter 6: Getting help...............................................................................................................92
Contacting Dell.................................................................................................................................................................. 92
Contents 5
Working on your computer
Topics:
•Safety instructions
Safety instructions
Prerequisites
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.
About this task
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.
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
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: The color of your computer and certain components may appear differently than shown in this document.
Before working inside your computer
Steps
1. Save and close all open files and exit all open applications.
2. Shut down your computer. Click Start > Power > Shut down.
NOTE: If you are using a different operating system, see the documentation of your operating system for shut-down
instructions.
1
6 Working on your computer
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.
5. Remove any media card and optical disc from your computer, if applicable.
6. After the computer is unplugged, press and hold the power button for 5 seconds to ground the system board.
CAUTION: Place the computer on a flat, soft, and clean surface to avoid scratches on the display.
7. Place the computer face down.
Safety precautions
The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions.
Observe the following safety precautions before you perform any installation or break/fix procedures involving disassembly or
reassembly:
●Turn off the system and all attached peripherals.
●Disconnect the system and all attached peripherals from AC power.
●Disconnect all network cables, telephone, and telecommunications lines from the system.
●Use an ESD field service kit when working inside any to avoid electrostatic discharge (ESD) damage.
●After removing any system component, carefully place the removed component on an anti-static mat.
●Wear shoes with non-conductive rubber soles to reduce the chance of getting electrocuted.
Standby power
Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are
essentially powered while turned off. The internal power enables the system to be remotely turned on (wake on LAN) and
suspended into a sleep mode and has other advanced power management features.
Unplugging, pressing and holding the power button for 15 seconds should discharge residual power in the system board.
Bonding
Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done through
the use of a field service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare
metal and never to a painted or non-metal surface. The wrist strap should be secure and in full contact with your skin, and
ensure that you remove all jewelry such as watches, bracelets, or rings prior to bonding yourself and the equipment.
Electrostatic discharge—ESD protection
ESD is a major concern when you handle electronic components, especially sensitive components such as expansion cards,
processors, memory DIMMs, and system boards. Very slight charges can damage circuits in ways that may not be obvious, such
as intermittent problems or a shortened product life span. As the industry pushes for lower power requirements and increased
density, ESD protection is an increasing concern.
Due to the increased density of semiconductors used in recent Dell products, the sensitivity to static damage is now higher than
in previous Dell products. For this reason, some previously approved methods of handling parts are no longer applicable.
Two recognized types of ESD damage are catastrophic and intermittent failures.
●Catastrophic – Catastrophic failures represent approximately 20 percent of ESD-related failures. The damage causes
an immediate and complete loss of device functionality. An example of catastrophic failure is a memory DIMM that has
received a static shock and immediately generates a "No POST/No Video" symptom with a beep code emitted for missing or
nonfunctional memory.
●Intermittent – Intermittent failures represent approximately 80 percent of ESD-related failures. The high rate of
intermittent failures means that most of the time when damage occurs, it is not immediately recognizable. The DIMM
receives a static shock, but the tracing is merely weakened and does not immediately produce outward symptoms related to
the damage. The weakened trace may take weeks or months to melt, and in the meantime may cause degradation of memory
integrity, intermittent memory errors, etc.
The more difficult type of damage to recognize and troubleshoot is the intermittent (also called latent or "walking wounded")
failure.
Working on your computer 7
Perform the following steps to prevent ESD damage:
●Use a wired ESD wrist strap that is properly grounded. The use of wireless anti-static straps is no longer allowed; they do not
provide adequate protection. Touching the chassis before handling parts does not ensure adequate ESD protection on parts
with increased sensitivity to ESD damage.
●Handle all static-sensitive components in a static-safe area. If possible, use anti-static floor pads and workbench pads.
●When unpacking a static-sensitive component from its shipping carton, do not remove the component from the anti-static
packing material until you are ready to install the component. Before unwrapping the anti-static packaging, ensure that you
discharge static electricity from your body.
●Before transporting a static-sensitive component, place it in an anti-static container or packaging.
ESD field service kit
The unmonitored Field Service kit is the most commonly used service kit. Each Field Service kit includes three main components:
anti-static mat, wrist strap, and bonding wire.
Components of an ESD field service kit
The components of an ESD field service kit are:
●Anti-Static Mat – The anti-static mat is dissipative and parts can be placed on it during service procedures. When using an
anti-static mat, your wrist strap should be snug and the bonding wire should be connected to the mat and to any bare metal
on the system being worked on. Once deployed properly, service parts can be removed from the ESD bag and placed directly
on the mat. ESD-sensitive items are safe in your hand, on the ESD mat, in the system, or inside a bag.
●Wrist Strap and Bonding Wire – The wrist strap and bonding wire can be either directly connected between your wrist
and bare metal on the hardware if the ESD mat is not required, or connected to the anti-static mat to protect hardware that
is temporarily placed on the mat. The physical connection of the wrist strap and bonding wire between your skin, the ESD
mat, and the hardware is known as bonding. Use only Field Service kits with a wrist strap, mat, and bonding wire. Never
use wireless wrist straps. Always be aware that the internal wires of a wrist strap are prone to damage from normal wear
and tear, and must be checked regularly with a wrist strap tester in order to avoid accidental ESD hardware damage. It is
recommended to test the wrist strap and bonding wire at least once per week.
●ESD Wrist Strap Tester – The wires inside of an ESD strap are prone to damage over time. When using an unmonitored
kit, it is a best practice to regularly test the strap prior to each service call, and at a minimum, test once per week. A
wrist strap tester is the best method for doing this test. If you do not have your own wrist strap tester, check with your
regional office to find out if they have one. To perform the test, plug the wrist-strap's bonding-wire into the tester while it is
strapped to your wrist and push the button to test. A green LED is lit if the test is successful; a red LED is lit and an alarm
sounds if the test fails.
●Insulator Elements – It is critical to keep ESD sensitive devices, such as plastic heat sink casings, away from internal parts
that are insulators and often highly charged.
●Working Environment – Before deploying the ESD Field Service kit, assess the situation at the customer location. For
example, deploying the kit for a server environment is different than for a desktop or portable environment. Servers are
typically installed in a rack within a data center; desktops or portables are typically placed on office desks or cubicles. Always
look for a large open flat work area that is free of clutter and large enough to deploy the ESD kit with additional space to
accommodate the type of system that is being repaired. The workspace should also be free of insulators that can cause an
ESD event. On the work area, insulators such as Styrofoam and other plastics should always be moved at least 12 inches or
30 centimeters away from sensitive parts before physically handling any hardware components
●ESD Packaging – All ESD-sensitive devices must be shipped and received in static-safe packaging. Metal, static-shielded
bags are preferred. However, you should always return the damaged part using the same ESD bag and packaging that the
new part arrived in. The ESD bag should be folded over and taped shut and all the same foam packing material should be
used in the original box that the new part arrived in. ESD-sensitive devices should be removed from packaging only at an
ESD-protected work surface, and parts should never be placed on top of the ESD bag because only the inside of the bag is
shielded. Always place parts in your hand, on the ESD mat, in the system, or inside an anti-static bag.
●Transporting Sensitive Components – When transporting ESD sensitive components such as replacement parts or parts
to be returned to Dell, it is critical to place these parts in anti-static bags for safe transport.
ESD protection summary
It is recommended that all field service technicians use the traditional wired ESD grounding wrist strap and protective anti-static
mat at all times when servicing Dell products. In addition, it is critical that technicians keep sensitive parts separate from all
insulator parts while performing service and that they use anti-static bags for transporting sensitive components.
8Working on your computer
After working inside your computer
About this task
NOTE: Leaving stray or loose screws inside your computer may severely damage your computer.
Steps
1. Replace all screws and ensure that no stray screws remain inside your computer.
2. Connect any external devices, peripherals, or cables you removed before working on your computer.
3. Replace any media cards, discs, or any other parts that you removed before working on your computer.
4. Connect your computer and all attached devices to their electrical outlets.
5. Turn on your computer.
Working on your computer 9
Technology and components
This chapter details the technology and components available in the system.
Topics:
•USB features
•HDMI 1.4
•Power button LED behavior
USB features
Universal Serial Bus, or USB, was introduced in 1996. It dramatically simplified the connection between host computers and
peripheral devices like mouses, keyboards, external drivers, and printers.
Table 1. USB evolution
Type Data Transfer Rate Category Introduction Year
USB 2.0 480 Mbps High Speed 2000
USB 3.2 Gen 1 5 Gbps Super-Speed 2010
USB 3.2 Gen 2 10 Gbps Super-Speed 2013
USB 3.2 Gen 1 (Super-Speed USB)
For years, the USB 2.0 has been firmly entrenched as the de facto interface standard in the PC world with about 6 billion
devices sold, and yet the need for more speed grows by ever faster computing hardware and ever greater bandwidth demands.
The USB 3.2 Gen 1 finally has the answer to the consumer's demands with a theoretically 10 times faster than its predecessor. In
a nutshell, USB 3.2 Gen 1 features are as follows:
●Higher transfer rates (up to 5 Gbps)
●Increased maximum bus power and increased device current draw to better accommodate power-hungry devices
●New power management features
●Full-duplex data transfers and support for new transfer types
●Backward USB 2.0 compatibility
●New connectors and cable
The topics below cover some of the most commonly asked questions regarding USB 3.2 Gen 1.
Speed
Currently, there are 3 speed modes that are defined by the latest USB 3.2 Gen 1 specification. They are Super-Speed, Hi-Speed,
and Full-Speed. The new Super-Speed mode has a transfer rate of 4.8 Gbps. While the specification retains Hi-Speed, and
Full-Speed USB mode, commonly known as USB 2.0 and 1.1 respectively, the slower modes still operate at 480 Mbps and 12
Mbps respectively and are kept to maintain backward compatibility.
USB 3.2 Gen 1 achieves the much higher performance by the technical changes below:
●An additional physical bus that is added in parallel with the existing USB 2.0 bus (see the figure below).
2
10 Technology and components
●USB 2.0 previously had four wires (power, ground, and a pair for differential data); USB 3.2 Gen 1 adds four more for two
pairs of differential signals (receive and transmit) for a combined total of eight connections in the connectors and cabling.
●USB 3.2 Gen 1 utilizes the bi-directional data interface, rather than USB 2.0's half-duplex arrangement. This gives a 10-fold
increase in theoretical bandwidth.
With today's ever increasing demands that are placed on data transfers with high-definition video content, terabyte storage
devices, high megapixel count digital cameras etc., USB 2.0 may not be fast enough. Furthermore, no USB 2.0 connection could
ever come close to the 480Mbps theoretical maximum throughput, making data transfer at around 320 Mbps (40 MB/s) —
the actual real-world maximum. Similarly, USB 3.2 Gen 1 connections will never achieve 4.8Gbps. We will likely see a real-world
maximum rate of 400 MB/s with overheads. At this speed, USB 3.2 Gen 1 is a 10x improvement over USB 2.0.
Applications
USB 3.2 Gen 1 opens up the laneways and provides more headroom for devices to deliver a better overall experience. Where
USB video was barely tolerable previously (both from a maximum resolution, latency, and video compression perspective), it's
easy to imagine that with 5-10 times the bandwidth available, USB video solutions should work that much better. Single-link
DVI requires almost 2Gbps throughput. Where 480Mbps was limiting, 5Gbps is more than promising. With its promised 4.8Gbps
speed, the standard will find its way into some products that previously weren't USB territory, like external RAID storage
systems.
Listed below are some of the available Super-Speed USB 3.2 Gen 1 products:
●External Desktop USB 3.2 Gen 1 Hard Drives
●Portable USB 3.2 Gen 1 Hard Drives
●USB 3.2 Gen 1 Drive Docks & Adapters
●USB 3.2 Gen 1 Flash Drives & Readers
●USB 3.2 Gen 1 Solid-state Drives
●USB 3.2 Gen 1 RAIDs
●Optical Media Drives
●Multimedia Devices
●Networking
●USB 3.2 Gen 1 Adapter Cards & Hubs
Compatibility
The good news is that USB 3.2 Gen 1 has been carefully planned from the start to peacefully co-exist with USB 2.0. First of all,
while USB 3.2 Gen 1 specifies new physical connections and thus new cables to take advantage of the higher speed capability
of the new protocol, the connector itself remains the same rectangular shape with the four USB 2.0 contacts in the exact same
location as before. Five new connections to carry receive and transmitted data independently are present on USB 3.2 Gen 1
cables and only come into contact when connected to a proper Super-Speed USB connection.
Technology and components 11
HDMI 1.4
This topic explains the HDMI 1.4 and its features along with the advantages.
HDMI (High-Definition Multimedia Interface) is an industry-supported, uncompressed, all-digital audio/video interface. HDMI
provides an interface between any compatible digital audio/video source, such as a DVD player, or A/V receiver and a
compatible digital audio and/or video monitor, such as a digital TV (DTV). The primary advantage is cable reduction and content
protection provisions. HDMI supports standard, enhanced, or high-definition video, plus multichannel digital audio on a single
cable.
HDMI 1.4 Features
●HDMI Ethernet Channel - Adds high-speed networking to an HDMI link, allowing users to take full advantage of their
IP-enabled devices without a separate Ethernet cable.
●Audio Return Channel - Allows an HDMI-connected TV with a built-in tuner to send audio data "upstream" to a surround
audio system, eliminating the need for a separate audio cable.
●3D - Defines input/output protocols for major 3D video formats, paving the way for true 3D gaming and 3D home theater
applications.
●Content Type - Real-time signaling of content types between display and source devices, enabling a TV to optimize picture
settings based on content type.
●Additional Color Spaces - Adds support for additional color models used in digital photography and computer graphics.
●4K Support - Enables video resolutions far beyond 1080p, supporting next-generation displays that will rival the Digital
Cinema systems used in many commercial movie theaters.
●HDMI Micro Connector - A new, smaller connector for phones and other portable devices, supporting video resolutions up
to 1080p.
●Automotive Connection System - New cables and connectors for automotive video systems, designed to meet the unique
demands of the motoring environment while delivering true HD quality.
Advantages of HDMI
●Quality HDMI transfers uncompressed digital audio and video for the highest, crispest image quality.
●Low-cost HDMI provides the quality and functionality of a digital interface while also supporting uncompressed video formats
in a simple, cost-effective manner.
●Audio HDMI supports multiple audio formats from standard stereo to multichannel surround sound.
●HDMI combines video and multichannel audio into a single cable, eliminating the cost, complexity, and confusion of multiple
cables currently used in A/V systems.
●HDMI supports communication between the video source (such as a DVD player) and the DTV, enabling new functionality.
Power button LED behavior
On certain Dell Latitude systems, the power button LED is used to provide an indication of the system status, and as a result the
power button illuminates when pressed. The systems with the optional power button/fingerprint reader will have no LED under
the power button and hence will apply the available LED's in the system to provide an indication of the system status.
Power button LED behavior without Fingerprint reader
●System is ON (S0) = LED illuminates solid white.
●System in Sleep/Standby (S3, SOix) = LED is off
●System is Off/Hibernating (S4/S5) = LED is off
Power On and LED behavior with Fingerprint reader
●Pressing the power button for a duration between 50 msec to 2 sec turns on the device.
●Power button does not register additional presses until the SOL (Sign-Of-Life) has been provided to the user.
12 Technology and components
●System LED's illuminates upon pressing the power button.
●All the available LED's (Keyboard backlit/ Keyboard caps lock LED/ Battery Charge LED) illuminates and displays specified
behavior.
●The auditory tone is Off by default. It can be enabled in the BIOS setup.
●Safeguards do not time out if the device gets hung during the logon process.
●Dell logo: Turns on within 2 secs after pressing the power button.
●Full boot: Within 22 secs after pressing the power button.
●Below is the example timelines:
Power button with fingerprint reader will have no LED and will leverage the available LED's in the system to provide indication of
the system status
●Power Adapter LED:
○The LED on Power adapter connector illuminates white when power is supplied from electrical outlet.
●Battery Indicator LED:
○If the computer is connected to an electrical outlet, the battery light operates as follows:
1. Solid white -the battery is charging. When the charge is complete the LED turns off.
○If the computer is running on a battery, the battery light operates as follows:
1. Off -the battery is adequately charged (or the computer is turned off).
2. Solid amber -the battery charge is critically low. A low battery state is approximately 30 minutes or less of battery life
remaining.
●Camera LED
○White LED activates when camera is on.
●Mic Mute LED:
○When activated (muted), the mic mute LED on the F4 Key should illuminate WHITE.
●RJ45 LEDs:
Technology and components 13
○Table 2. LED on either side of RJ45 port
Link speed indicator (LHS) Activity indicator (RHS)
Green Amber
14 Technology and components
3
Exploded View 15
Exploded View
16 Exploded View
1. Base cover
2. Battery
3. DC-in Port
4. Memory modules
5. Solid-State Drive bracket
6. Solid-State Drive
7. System Board
8. Speakers
9. Touchpad
10. Display Assembly
11. Palmrest Assembly
12. HDD Assembly
13. IO Board
14. Coin Cell Battery
15. Power Button Module
16. WLAN Card
17. Fan Assembly
18. Heatsink assembly
NOTE: Dell provides a list of components and their part numbers for the original system configuration purchased. These
parts are available according to warranty coverages purchased by the customer. Contact your Dell sales representative for
purchase options.
Exploded View 17
Disassembly and reassembly
Topics:
•Secure Digital Card
•Base cover
•Battery
•Memory modules
•WLAN card
•Solid-state drive
•Hard drive
•Coin-cell battery
•System fan
•Heat sink
•Speakers
•IO board
•Touchpad
•Display assembly
•Display bezel
•Camera
•Display panel
•Display back-cover and antenna assembly
•Power button
•System board
•Power-adapter port
•Palm-rest and keyboard assembly
Secure Digital Card
Removing the Secure Digital card
Prerequisites
1. Follow the procedure in Before working inside your computer
4
18 Disassembly and reassembly
About this task
Steps
1. Push the secure digital card to release it from the computer.
2. Slide the secure digital card out of the computer.
Installing the Secure Digital card
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 19
About this task
Steps
Slide the secure digital into the slot until it clicks into place.
Next steps
1. Follow the procedure in after working inside your computer
Base cover
Removing the base cover
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
20 Disassembly and reassembly
About this task
Disassembly and reassembly 21
Steps
1. Remove the seven (M2.5x5) screws and loosen the two captive screws from the base cover.
2. Pry open the base cover starting from the recesses located in the U-shaped indents at the top edge of the base cover near
the hinges.
NOTE: CAUTION: DO NOT pry up from the edge near the vents at the top side of the base cover as this may damage
the base cover.
3. Lift up the top side of the base cover and remove it from the system.
Installing the base cover
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
22 Disassembly and reassembly
About this task
Disassembly and reassembly 23
Steps
1. Align and place the base cover on the computer, press the edges and sides of the base cover until it snaps into place.
2. Tighten the seven (M2.5x5) screws and the two captive screws to secure the base cover to the computer.
Next steps
1. Replace the SD card
2. Follow the procedure in after working inside your computer
Battery
Lithium-ion battery precautions
CAUTION:
●Exercise caution when handling Lithium-ion batteries.
●Discharge the battery as much as possible before removing it from the system. This can be done by
disconnecting the AC adapter from the system to allow the battery to drain.
●Do not crush, drop, mutilate, or penetrate the battery with foreign objects.
●Do not expose the battery to high temperatures, or disassemble battery packs and cells.
●Do not apply pressure to the surface of the battery.
●Do not bend the battery.
●Do not use tools of any kind to pry on or against the battery.
●Ensure any screws during the servicing of this product are not lost or misplaced, to prevent accidental
puncture or damage to the battery and other system components.
●If the battery gets stuck inside your computer as a result of swelling, do not try to release it as puncturing,
bending, or crushing a lithium-ion battery can be dangerous. In such an instance, contact Dell technical
support for assistance. See www.dell.com/contactdell.
●Always purchase genuine batteries from www.dell.com or authorized Dell partners and resellers.
Disconnecting the battery
Prerequisites
1. Follow the procedure in before working inside your computer
2. Remove the SD card.
3. Remove the base cover.
24 Disassembly and reassembly
About this task
Steps
1. Peel back the tape covering the battery connector.
2. Disconnect the battery cable from the connector on the system board.
Reconnecting the battery
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 25
About this task
Steps
1. Connect the battery cable to the connector on the system board.
2. Replace the tape covering the battery connector.
Next steps
1. Install the base cover.
2. Install the SD card.
3. Follow the procedure in after working inside your computer.
Removing the battery
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
About this task
26 Disassembly and reassembly
Steps
1. Remove the three (M2x3) screws that secure the battery to the palmrest.
2. Lift and move the battery away from the computer.
Installing the battery
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 27
About this task
Steps
1. Align the tabs on the battery with the slots on the palm rest assembly.
NOTE: When installing the battery into the system, insert the tab at the bottom left corner of the battery into the hook
on the bottom side of the palm rest.
2. Replace the three (M2x3) screws that secure the battery to the palmrest.
3. Reconnect the battery cable to the connector on the system board.
NOTE: When installing the battery into the system, insert the tab at the bottom left corner of the battery into the hook
on the bottom side of the palm rest.
Next steps
1. Install the base cover.
2. Install the SD card.
3. Follow the procedure in after working inside your computer.
28 Disassembly and reassembly
Memory modules
Removing the memory module
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
About this task
Steps
1. Pry the clips securing the memory module until the memory module pops-up.
2. Remove the memory module from the memory module slot.
Installing the memory module
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 29
About this task
Steps
1. Align the notch on the memory module with the tab on the memory module slot and slide the memory module firmly into the
slot at an angle.
2. Press the memory module down until the clips secure it.
NOTE: If you do not hear the click, remove the memory module and reinstall it.
Next steps
1. Connect the battery cable.
2. Install the base cover.
3. Install the SD card.
4. Follow the procedure in after working inside your computer.
WLAN card
Removing the WLAN card
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
30 Disassembly and reassembly
About this task
Steps
1. Remove the single (M2x3) screw that secures the WLAN card bracket to the system board.
2. Slide and remove the WLAN card bracket that secures the WLAN antenna cables.
3. Disconnect the WLAN antenna cables from the connectors on the WLAN card.
4. Pull out the WLAN card from the M.2 port on the system board.
Installing the WLAN card
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 31
About this task
Steps
1. Replace the WLAN card into the M.2 Slot on the system board.
2. Connect the WLAN antenna cables to the connectors on the WLAN card.
3. Place the WLAN card bracket to secure the WLAN antenna cables to the WLAN card.
4. Replace the single (M2x3) screw to secure the WLAN bracket and the WLAN card to the palmrest.
Next steps
1. Connect the battery cable.
2. Install the base cover.
3. Install the SD card.
4. Follow the procedure in after working inside your computer.
Solid-state drive
Removing the M.2 2230 Solid-state drive
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
32 Disassembly and reassembly
3. Remove the base cover.
4. Disconnect the battery cable.
About this task
Steps
1. Remove the single (M2x2.2) screw and loosen the single captive screw, securing the SSD thermal plate to the palmrest, to
lift it out of the system.
2. Turn the thermal plate over and remove the single (M2x2) screw securing the M.2 2230 SSD to the thermal plate.
3. Lift the solid-state drive off the thermal plate.
Installing the M.2 2230 Solid-state drive
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 33
About this task
Steps
1. Place the solid-state drive into the thermal plate and install the single (M2x2) screw.
2. Slide and insert the tab of the solid-state drive into the solid-state drive slot.
3. Replace the single (M2x2.2) screw and tighten the single captive screw to secures the thermal plate to the palmrest.
Next steps
1. Connect the battery cable.
2. Install the base cover.
3. Install the SD card.
4. Follow the procedure in after working inside your computer.
Removing the M.2 2280 Solid-state drive
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
34 Disassembly and reassembly
About this task
Steps
1. Remove the two (M2x2.2) screw from the thermal bracket and lift the bracket out of the system.
2. Lift the solid-state drive from the M.2 slot on the system board and remove it from the system.
Installing the M.2 2280 Solid-state drive
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 35
About this task
Steps
1. Slide and insert the Solid-state drive into the M.2 port on the system board.
2. Place the thermal bracket on the solid-state drive, replace the two (M2x2.2) screws to secure the thermal plate to the
palmrest.
Next steps
1. Connect the battery cable.
2. Install the base cover.
3. Install the SD card.
4. Follow the procedure in after working inside your computer.
Hard drive
Removing the hard drive assembly
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Remove the battery.
36 Disassembly and reassembly
About this task
Steps
1. Lift the latch and disconnect the hard drive cable from the system board.
2. Remove the four (M2x3) screws that secure the hard drive assembly to the palmrest and lift the hard drive assembly along
with its cable from the system.
3. Disconnect the interposer from the hard drive.
4. Remove the four (M3x3) screws from the hard drive bracket to free the hard drive.
Installing the hard drive assembly
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 37
About this task
Steps
1. Align the hard drive with the hard drive bracket and replace the four (M3x3) screws.
2. Connect the interposer to the hard drive.
3. Align and place the hard drive assembly on the palmrest, then replace the four (M2x3) screws to secure the hard drive
assembly to the palmrest.
4. Connect the hard drive cable to the system board and close the latch to secure the cable.
Next steps
1. Install the battery.
2. Install the base cover.
3. Install the SD card.
4. Follow the procedure in after working inside your computer.
38 Disassembly and reassembly
Coin-cell battery
Removing the coin-cell
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
5. Remove the IO board.
About this task
Steps
1. Use a plastic scribe to pry up the coin-cell battery from the slot on the IO daughter board.
2. Remove the coin-cell battery from the IO daughter board.
Disassembly and reassembly 39
Installing the coin-cell battery
About this task
Steps
1. With the positive-side facing up, insert the coin-cell battery into the battery socket on the I/O board.
2. Press the battery until it clicks into place.
Next steps
1. Install the IO board.
2. Connect the battery cable.
3. Install the base cover.
4. Install the SD card.
5. Follow the procedure in after working inside your computer.
System fan
Removing the system fan
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
40 Disassembly and reassembly
About this task
Steps
1. Disconnect the fan cable from the connector on the system board and unthread the cable from the routing points on the fan
assembly.
2. Remove the two screws (M2.5x5) that secures the fan to the palmrest.
Installing the system fan
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 41
About this task
Steps
1. Align and place the fan on the palm rest.
2. Replace the two screws (M2.5x5) that secure the fan to the palmrest.
3. Route the cable thought the routing points on the fan assembly, and connect the fan cable to the connector on the system
board .
Next steps
1. Reconnect the battery cable.
2. Replace the base cover.
3. Replace the SD card.
4. Follow the procedure in after working inside your computer.
Heat sink
Removing the heatsink
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
42 Disassembly and reassembly
About this task
Steps
1. Loosen the four captive screws that secure the heatsink to the system board.
2. Lift the heatsink off the system board.
Installing the heatsink
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 43
About this task
Steps
1. Place the heatsink on the system board and align the captive screws on the heatsink with the screw holes on the system
board.
2. Tiighten the four captive screws to secure the heatsink to the system board.
Next steps
1. Reconnect the battery cable.
2. Install the base cover.
3. Install the SD card.
4. Follow the procedure in after working inside your computer.
Speakers
Removing the speakers
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
5. Remove the SSD.
44 Disassembly and reassembly
About this task
Steps
1. Disconnect the speaker cable from the system board.
2. Unroute and remove the speaker cable from the routing guides on palmrest.
3. Lift the speakers, along with the cable, off the system.
Installing the speakers
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
NOTE: If the rubber grommets are pushed out when removing the speakers, push them back in before replacing the
speakers.
Disassembly and reassembly 45
Steps
1. Using the alignment posts and rubber grommets, place the speakers in the slots on the palm rest.
2. Route the speaker cable through the routing guides on the palmrest.
3. Connect the speaker cable to the connector on the system board .
Next steps
1. Install the SSD.
2. Reconnect the battery cable.
3. Install the base cover.
4. Install the SD card.
5. Follow the procedure in after working inside your computer.
IO board
Removing the IO board
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
46 Disassembly and reassembly
About this task
Steps
1. [For models shipped with a fingerprint reader] : Disconnect the fingerprint reader to IO daughter board FFC and IO daughter
board to system board FFC from the IO daughter board.
2. [For models shipped without a fingerprint reader] : Disconnect the power button FFC, IO daughter board FFC, and display
cable from the system board.
3. Peel back the power button FFC and IO daughter board FFC from the palm rest.
4. Remove the four (M2x4) screws that secure the IO board to the palmrest, and remove the IO board from the system.
5. Disconnect and remove the power button FFC and IO daughter board FFC from the IO daughter board.
Installing the IO board
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 47
About this task
Steps
1. Reconnect the power button FFC and IO daughter board FFC to the IO daughter board.
2. Place the IO daughter board onto the from the system.
3. Replace the four (M2x4) screws to secure the IO daughter board to the palmrest.
4. [For models shipped without a fingerprint reader] : Reconnect the power button FFC, IO daughter board FFC, and display
cable to the connectors on the system board.
5. [For models shipped with a fingerprint reader] : Reconnect the fingerprint reader to IO daughter FFC and IO daughter board
to system board FFC from the IO daughter board.
Next steps
1. Connect the battery cable.
2. Install the base cover.
3. Install the SD card.
4. Follow the procedure in after working inside your computer.
Touchpad
Removing the touch pad assembly
Prerequisites
1. Follow the procedure in before working inside your computer.
48 Disassembly and reassembly
2. Remove the SD card.
3. Remove the base cover.
4. Remove the battery.
About this task
Steps
1. Disconnect the touchpad FFC from the system board.
2. Peel back the conductive tape from the touchpad module.
3. Remove the three (M2x2) screws securing the touchpad bracket in place.
4. Remove the touchpad bracket from the system.
5. Remove the two (M2x2) screws securing the touchpad module in place.
6. Remove the touchpad module with touchpad FFC from the system.
7. Disconnect the touchpad FFC from the touchpad module.
Installing the touch pad assembly
About this task
NOTE: Ensure that the touch pad is aligned with the guides available on the palm-rest and keyboard assembly, and the gap
on either sides of the touch pad is equal.
Disassembly and reassembly 49
Steps
1. Reconnect the touchpad FFC to the touchpad module.
2. Align and place the touchpad module onto the system.
NOTE: When installing the touchpad bracket on the Vostro 3401, insert its top corners under the two tabs on the palm
rest.
3. Install the two (M2x2) screws to secure the touchpad module to the palmrest.
4. Install the touchpad bracket on the touchpad and secure it using the three (M2x2) screws.
5. Peel back the conductive tape over the touchpad module.
6. Reconnect the touchpad FFC to the system board.
Next steps
1. Install the battery.
2. Install the base cover.
3. Install the SD card.
4. Follow the procedure in after working inside your computer.
50 Disassembly and reassembly
Steps
1. Disconnect the display cable from the connector on the system board.
52 Disassembly and reassembly
2. Unthread the display cable and WLAN antenna cables from the routing channels.
3. Open the system to at least 90-degrees and place the system on the edge of a table so that the palm rest is laying flat on
the table and the display assembly is over the edge.
4. Remove the four (M2.5x5) screws securing the display assembly in place.
5. Remove the display assembly from the system.
Installing the display assembly
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
NOTE: Ensure that the hinges are opened to the maximum before replacing the display assembly on the palmrest and
keyboard assembly.
Disassembly and reassembly 53
Steps
1. Align and place the system under the hinges on the display assembly.
2. Install the four (M2.5x5) screws securing the display assembly in place.
54 Disassembly and reassembly
3. Re-route the display cable and WLAN antenna cables through the routing channels on the palmrest.
4. Reconnect the display cable to the connector on the system board.
Next steps
1. Install the WLAN.
2. Install the base cover.
3. Install the SD card.
4. Follow the procedure in after working inside your computer.
Display bezel
Removing the display bezel
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Remove the battery cable.
5. Remove the display assembly.
About this task
Steps
1. Pry open the display bezel from the inner edge at the left and right sides of the display assembly.
Disassembly and reassembly 55
2. Pry open the display bezel from the inner edge at the top side of the display assembly.
3. Pry open the hinge caps at the bottom side of the display assembly.
56 Disassembly and reassembly
4. Pry open the display bezel from the inner edge at the bottom side of the display assembly.
5. Lift and remove the display bezel from the display assembly
NOTE: CAUTION: DO NOT use a scribe or any other objects to pry up the display bezel in the manners shown in the
images below as the pressure applied on the display panel by the scribe will damage the display panel.
Disassembly and reassembly 57
Installing the display bezel
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
58 Disassembly and reassembly
About this task
Steps
Align the display bezel with the display back-cover and antenna assembly, and then gently snap the display bezel into place.
Next steps
1. Install the display assembly.
2. Reconnect the battery cable.
3. Install the base cover.
4. Install the SD card.
5. Follow the procedure in after working inside your computer.
Camera
Removing the camera
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
5. Remove the WLAN.
6. Remove the display assembly.
7. Remove the display bezel.
8. Remove the display panel.
Disassembly and reassembly 59
About this task
Steps
1. Disconnect the camera cable from the camera module.
2. Using a plastic scribe, gently pry the camera off the display back-cover and antenna assembly.
Installing the camera
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
60 Disassembly and reassembly
About this task
Steps
1. Using the alignment post, adhere the camera module on the display back-cover and antenna assembly.
2. Connect the camera cable to the camera module.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WLAN.
5. Connect the battery cable.
6. Install the base cover.
7. Install the SD card.
8. Follow the procedure in after working inside your computer.
Display panel
Removing the display panel
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WLAN.
6. Remove the display assembly.
7. Remove the display bezel.
Disassembly and reassembly 61
About this task
62 Disassembly and reassembly
Steps
1. Remove the six (M2.5x2.5) screws securing the display panel to the hinges.
2. Gently flip the display panel assembly forward, peel back the mylar tape securing the display cable on the rear of the display
panel.
NOTE: Ensure the panel has a clean and smooth surface to rest on to prevent damage.
3. Disconnect the display cable from the display panel assembly and lift the display panel away from the system.
NOTE: Do not remove the metal brackets from the panel.
Installation display panel
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 63
About this task
64 Disassembly and reassembly
Steps
1. Place the display panel on a flat and clean surface .
2. Connect the display cable to the connector at the back of the display panel and close the latch to secure the cable .
3. Adhere the tape that secures the display cable to the back of the display panel .
4. Turn the display panel over and place it on the display back-cover .
5. Replace the six (M2.5x2.5) screws that secure the display panel to the display back-cover.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WLAN.
5. Install the battery.
6. Install the base cover.
7. Install the SD card.
8. Follow the procedure in after working inside your computer.
Display back-cover and antenna assembly
Removing the display back-cover
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
5. Remove the WLAN.
6. Remove the display assembly.
7. Remove the display bezel.
8. Remove the display panel.
About this task
After performing all the preceding steps, you are left with the display back-cover.
Disassembly and reassembly 65
Installing the display back-cover
About this task
Place the display back-cover on a clean and flat surface.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WLAN.
5. Connect the battery cable.
6. Install the base cover.
7. Install the SD card.
8. Follow the procedure in after working inside your computer.
Camera
Removing the camera
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
5. Remove the WLAN.
6. Remove the display assembly.
7. Remove the display bezel.
8. Remove the display panel.
66 Disassembly and reassembly
About this task
Steps
1. Disconnect the camera cable from the camera module.
2. Using a plastic scribe, gently pry the camera off the display back-cover and antenna assembly.
Installing the camera
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Disassembly and reassembly 67
About this task
Steps
1. Using the alignment post, adhere the camera module on the display back-cover and antenna assembly.
2. Connect the camera cable to the camera module.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WLAN.
5. Connect the battery cable.
6. Install the base cover.
7. Install the SD card.
8. Follow the procedure in after working inside your computer.
Display panel
Removing the display panel
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WLAN.
6. Remove the display assembly.
7. Remove the display bezel.
68 Disassembly and reassembly
About this task
Disassembly and reassembly 69
Steps
1. Remove the six (M2.5x2.5) screws securing the display panel to the hinges.
2. Gently flip the display panel assembly forward, peel back the mylar tape securing the display cable on the rear of the display
panel.
NOTE: Ensure the panel has a clean and smooth surface to rest on to prevent damage.
3. Disconnect the display cable from the display panel assembly and lift the display panel away from the system.
NOTE: Do not remove the metal brackets from the panel.
Installation display panel
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
70 Disassembly and reassembly
About this task
Disassembly and reassembly 71
Steps
1. Place the display panel on a flat and clean surface .
2. Connect the display cable to the connector at the back of the display panel and close the latch to secure the cable .
3. Adhere the tape that secures the display cable to the back of the display panel .
4. Turn the display panel over and place it on the display back-cover .
5. Replace the six (M2.5x2.5) screws that secure the display panel to the display back-cover.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WLAN.
5. Install the battery.
6. Install the base cover.
7. Install the SD card.
8. Follow the procedure in after working inside your computer.
Display back-cover and antenna assembly
Removing the display back-cover
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
5. Remove the WLAN.
6. Remove the display assembly.
7. Remove the display bezel.
8. Remove the display panel.
About this task
After performing all the preceding steps, you are left with the display back-cover.
72 Disassembly and reassembly
Installing the display back-cover
About this task
Place the display back-cover on a clean and flat surface.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WLAN.
5. Connect the battery cable.
6. Install the base cover.
7. Install the SD card.
8. Follow the procedure in after working inside your computer.
Power button
Removing the power button
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Disconnect the battery cable.
5. Remove the IO board.
Disassembly and reassembly 73
About this task
Steps
1. Remove the two (M2x2) screws securing the power button to the palmrest.
2. Disconnect the power button cable and remove the power button from the system.
Installing the power button
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
74 Disassembly and reassembly
About this task
Steps
1. Place the power-button board into the slot on the palmrest.
2. Install the two (M2x2) screws to secure the power button to the palmrest.
3. Connect the power button cable to the connector on the system board.
Next steps
1. Install the IO board.
2. Connect the battery cable.
3. Install the base cover.
4. Install the SD card.
5. Follow the procedure in after working inside your computer.
System board
Removing the system board - Realtek audio
Prerequisites
1. Follow the procedure in before working inside your computer
2. Remove the SD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WLAN.
6. Remove the SSD.
7. Remove the memory.
8. Remove the system fan.
9. Remove the heatsink.
Disassembly and reassembly 75
About this task
Disassembly and reassembly 77
Steps
1. Remove the two (M2.5x5) screws from the right hinge, Fold the right hinge up.
2. Disconnect the following cables from the system board:
a. Speaker cable
b. Keyboard FFC
c. Power adapter port cable
d. Keyboard backlight FFC
e. Touchpad FFC
f. Hard drive FFC
g. IO board FFC
h. Fingerprint reader FFC
i. Power button FFC from the system board
3. Remove the single (M2x4) screw that secures the system board to the palmrest.
4. Carefully lift the system board away from the chassis.
Installing the system board - Realtek audio
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
78 Disassembly and reassembly
About this task
Disassembly and reassembly 79
Steps
1. Align and place the system board on the palmrest.
2. Replace the single (M2x4) screw that secures the system board to the palmrest.
3. Connect the following cables to the system board:
a. Speaker cable
b. Keyboard FFC
c. Keyboard backlight FFC
d. Touchpad FFC
e. Hard drive FFC
f. IO board FFC
g. Power adapter port cable
h. Fingerprint reader FFC
i. Power button FFC from the system board
4. Fold back the right hinge and install the two (M2.5x5) screws to secure it to the palmrest.
Next steps
1. Install the display assembly.
2. Install the heatsink.
3. Install the system fan.
4. Install the memory.
5. Install the SSD.
6. Install the WLAN.
7. Install the battery.
8. Install the base cover.
9. Install the SD card.
10. Follow the procedure in after working inside your computer.
Removing the system board - Cirrus Logic audio
Prerequisites
1. Follow the procedure in before working inside your computer
2. Remove the SD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WLAN.
6. Remove the SSD.
7. Remove the memory.
8. Remove the system fan.
9. Remove the heatsink.
NOTE: The system board can be removed along with the heat sink.
10. Remove the display assembly.
80 Disassembly and reassembly
About this task
Disassembly and reassembly 81
Steps
1. Remove the two (M2.5x5) screws from the right hinge and fold the right hinge up.
2. Disconnect the following cables from the system board:
a. Speaker cable
b. Keyboard FFC
c. Power adapter port cable
d. Keyboard backlight FFC
e. Touchpad FFC
f. Hard drive FFC
g. IO board FFC
h. Fingerprint reader FFC
i. Power button FFC from the system board
3. Peel back the Mylar tape from over the screw hole
4. Remove the two (M2x4) screws that secures the system board to the palmrest.
5. Carefully lift the system board away from the chassis.
Installing the system board - Cirrus Logic audio
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
82 Disassembly and reassembly
About this task
Disassembly and reassembly 83
Steps
1. Align and place the system board on the palmrest.
2. Peel back the Mylar tape from over the screw hole.
3. Replace the two screws (M2x4) that secures the system board to the palmrest.
4. Connect the following cables to the system board:
a. Speaker cable
b. Keyboard FFC
c. Keyboard backlight FFC
d. Touchpad FFC
e. Hard drive FFC
f. IO board FFC
g. Power adapter port cable
h. Fingerprint reader FFC
i. Power button FFC from the system board
5. Fold back the right hinge and install the two (M2.5x5) screws to secure it to the palmrest.
Next steps
1. Install the display assembly.
2. Install the heatsink.
84 Disassembly and reassembly
3. Install the system fan.
4. Install the memory.
5. Install the SSD.
6. Install the WLAN.
7. Install the battery.
8. Install the base cover.
9. Install the SD card.
10. Follow the procedure in after working inside your computer.
Power-adapter port
Removing the power adapter port
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Remove the battery cable.
5. Remove the WLAN.
6. Remove the SSD.
7. Remove the system fan.
8. Remove the display assembly
9. Remove the system board
NOTE: The system board can be removed along with the heat sink.
About this task
Disassembly and reassembly 85
Steps
1. Disconnect and un-route the power adapter port module from the system board.
2. Remove the power adapter port module from the system.
Installing the power adapter port
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
Steps
Place the power adapter port module into the slot provided on the palmrest.
Next steps
1. Install the system board.
2. Install the display assembly.
3. Install the system fan.
4. Install the SSD.
5. Install the WLAN.
6. Connect the battery cable.
7. Install the base cover.
8. Install the SD card.
9. Follow the procedure in after working inside your computer.
86 Disassembly and reassembly
Palm-rest and keyboard assembly
Removing the palmrest and keyboard assembly
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the SD card.
3. Remove the base cover.
4. Remove the battery.
5. Remove the WLAN.
6. Remove the memory
7. Remove the display assembly.
8. Remove the SSD.
9. Remove the hard drive assembly.
10. Remove the speakers.
11. Remove the coin-cell battery.
12. Remove the system fan.
13. Remove the heatsink.
NOTE: The system board can be removed along with the heat sink.
14. Remove the IO board.
15. Remove the touchpad.
16. Remove the power adapter port.
17. Remove the system board.
About this task
NOTE: The system board can be removed and installed together with the heatsink still attached.
After performing the preceding steps, you are left with the palmrest and keyboard assembly.
Next steps
1. Install the system board.
2. Install the power adapter port.
Disassembly and reassembly 87
3. Install the touchpad.
4. Install the IO board.
5. Install the heatsink.
6. Install the system fan.
7. Install the coin-cell battery.
8. Install the speakers.
9. Install the hard drive assembly.
10. Install the SSD.
11. Install the display assembly.
12. Install the memory
13. Install the WLAN.
14. Install the battery.
15. Install the base cover.
16. Install the SD card.
17. Follow the procedure in before working inside your computer.
88 Disassembly and reassembly
Troubleshooting
Topics:
•Enhanced Pre-Boot System Assessment (ePSA) diagnostics
•System diagnostic lights
•WiFi power cycle
Enhanced Pre-Boot System Assessment (ePSA)
diagnostics
About this task
The SupportAssist diagnostics (also known as system diagnostics) performs a complete check of your hardware. The
SupportAssist diagnostics is embedded with the BIOS and is launched by the BIOS internally. The embedded system diagnostics
provides a set of options for particular devices or device groups allowing you to:
●Run tests automatically or in an interactive mode
●Repeat tests
●Display or save test results
●Run thorough tests to introduce additional test options to provide extra information about the failed device(s)
●View status messages that inform you if tests are completed successfully
●View error messages that inform you of problems encountered during testing
NOTE: The SupportAssist window displays, listing all devices detected in the computer. The diagnostics starts running the
tests on all the detected devices.
Running SupportAssist diagnostics
Steps
1. Turn on your computer.
2. As the computer boots, press the F12 key as the Dell logo appears.
3. On the boot menu screen, select the Diagnostics option.
4. Click the arrow at the bottom left corner.
Diagnostics front page is displayed.
5. Click the arrow in the lower-right corner to go to the page listing.
The items detected are listed.
6. To run a diagnostic test on a specific device, press Esc and click Yes to stop the diagnostic test.
7. Select the device from the left pane and click Run Tests.
8. If there are any issues, error codes are displayed.
Note the error code and validation number and contact Dell.
SupportAssist diagnostic User Interface
SupportAssist diagnostic User Interface
About this task
This section contains information on Support Assist Basic and Advanced Screen.
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Troubleshooting 89
SupportAssist opens the basic screen on start. You can switch to the advanced screen using the icon at the bottom left of
the screen. The advanced screen shows detected devices in a tiled format. Specific tests can be included or excluded only
in the advanced mode. The Basic Screen has minimal controls which allows easy navigation for the user to start or stop the
diagnostics.
System diagnostic lights
Power and battery-status light
Indicates the power and battery-charge status.
Solid white—Power adapter is connected and the battery has more than 5% charge.
Amber—Computer is running on battery and the battery has less than 5% charge.
Off
●Power adapter is connected, and the battery is fully charged.
●Computer is running on battery, and the battery has more than 5% charge.
●Computer is in sleep state, hibernation, or turned off.
The power and battery-status light blinks amber along with beep codes indicating failures.
For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times
followed by a pause. This 2,3 pattern continues until the computer is turned off indicating no memory or RAM is detected.
The following table shows different power and battery-status light patterns and associated problems.
Table 3. LED codes
Diagnostic light codes Problem description Recommended solutions
1,1 TPM detection failure Replace the system board.
1,2 Unrecoverable SPI Flash failure Replace the system board.
1,3 Short in hinge cable tripped OCP1 Check if the display cable (EDP) is seated
properly or pinched at the hinges. If problem
persists, replace either display cable (EDP) or
display assembly (LCD).
1,4 Short in hinge cable tripped OCP2 Check if the display cable (EDP) is seated
properly or pinched at the hinges. If problem
persists, replace either display cable (EDP) or
display assembly (LCD).
1,5 EC unable to program i-Fuse Replace the system board.
1,6 Generic catch-all for ungraceful EC code flow
errors
Disconnect all power source (AC, battery,
coin cell) and drain flea power by pressing &
holding down power button.
2,1 Processor failure Run the Intel CPU diagnostics tools. If
problem persists, replace the system board.
2,2 System board: BIOS or ROM (Read-Only
Memory) failure
Flash latest BIOS version. If problem persists,
replace the system board.
2,3 No memory or RAM (Random-Access Memory)
detected
Confirm that the memory module is installed
properly. If problem persists, replace the
memory module.
2,4 Memory or RAM (Random-Access Memory)
failure
Reset and swap memory modules amongst
the slots. If problem persists, replace the
memory module.
2,5 Invalid memory installed Reset and swap memory modules among the
slots. If problem persists, replace the memory
module.
2,6 System-board or chipset error Flash latest BIOS version. If problem persists,
replace the system board.
90 Troubleshooting
Table 3. LED codes
Diagnostic light codes Problem description Recommended solutions
2,7 LCD failure - SBIOS message Replace display vable (EDP) if possible,
otherwise replace the display assembly
(LCD).
2,8 LCD failure - EC detection of power rail failure Replace the system board.
3,1 Coin-cell battery failure Reset the CMOS battery connection. If
problem persists, replace the RTC battery.
3,2 PCI, video card/chip failure Replace the system board.
3,3 Recovery image not found Flash latest BIOS version. If problem persists,
replace the system board.
3,4 Recovery image found but invalid Flash latest BIOS version. If problem persists,
replace the system board.
3,5 Power-rail failure EC ran into power sequencing failure. If
problem persists, replace the system board.
3,6 System BIOS Flash incomplete Flash corruption detected by SBIOS. If
problem persists, replace the system board.
3,7 Management Engine (ME) error Timeout waiting on ME to reply to HECI
message. If problem persists, replace the
system board.
Camera status light: Indicates whether the camera is in use.
●Solid white—Camera is in use.
●Off—Camera is not in use.
Caps Lock status light: Indicates whether Caps Lock is enabled or disabled.
●Solid white—Caps Lock enabled.
●Off—Caps Lock disabled.
WiFi power cycle
About this task
If your computer is unable to access the internet due to WiFi connectivity issues a WiFi power cycle procedure may be
performed. The following procedure provides the instructions on how to conduct a WiFi power cycle:
NOTE: Some ISPs (Internet Service Providers) provide a modem/router combo device.
Steps
1. Turn off your computer.
2. Turn off the modem.
3. Turn off the wireless router.
4. Wait for 30 seconds.
5. Turn on the wireless router.
6. Turn on the modem.
7. Turn on your computer.
Troubleshooting 91
Getting help
Topics:
•Contacting Dell
Contacting Dell
Prerequisites
NOTE: If you do not have an active Internet connection, you can find contact information on your purchase invoice, packing
slip, bill, or Dell product catalog.
About this task
Dell provides several online and telephone-based support and service options. Availability varies by country and product, and
some services may not be available in your area. To contact Dell for sales, technical support, or customer service issues:
Steps
1. Go to Dell.com/support.
2. Select your support category.
3. Verify your country or region in the Choose a Country/Region drop-down list at the bottom of the page.
4. Select the appropriate service or support link based on your need.
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92 Getting help