Table of Contents
- Dell Chromebook 3100 Service Manual
- Contents
- Working on your computer
- Removing and installing components
- Technology and components
- Troubleshooting
- Getting help and contacting Dell
DELL 3100 User Manual
Displayed below is the user manual for 3100 by DELL which is a product in the Notebooks category. This manual has pages.
Related Manuals
Dell Chromebook 3100
Service Manual
Regulatory Model: P29T
Regulatory Type: P29T001
Januray 2022
Rev. A04
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.
© 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........................................................................................... 5
Before working inside your computer.............................................................................................................................5
Safety precautions.............................................................................................................................................................. 5
Electrostatic discharge—ESD protection..................................................................................................................... 6
ESD field service kit ...........................................................................................................................................................6
Transporting sensitive components................................................................................................................................ 7
Safety instructions.............................................................................................................................................................. 8
Storing Chromebooks for long term - best practices.................................................................................................8
After working inside your computer................................................................................................................................9
Chapter 2: Removing and installing components.......................................................................... 10
Recommended tools..........................................................................................................................................................10
Screw list............................................................................................................................................................................. 10
Major components of your system ............................................................................................................................... 12
Disassembly and reassembly .......................................................................................................................................... 13
Base cover..................................................................................................................................................................... 13
SIM card......................................................................................................................................................................... 21
WWAN card.................................................................................................................................................................. 23
Battery........................................................................................................................................................................... 25
Keyboard ...................................................................................................................................................................... 29
Display assembly.......................................................................................................................................................... 32
Input Output board..................................................................................................................................................... 35
System board................................................................................................................................................................38
Speaker.......................................................................................................................................................................... 44
Display bezel................................................................................................................................................................. 46
Display panel.................................................................................................................................................................50
Camera...........................................................................................................................................................................54
Display hinges...............................................................................................................................................................56
Display cable................................................................................................................................................................. 59
Display back cover....................................................................................................................................................... 61
Palmrest assembly.......................................................................................................................................................62
Chapter 3: Technology and components...................................................................................... 65
USB features...................................................................................................................................................................... 65
USB Type-C........................................................................................................................................................................67
Keyboard............................................................................................................................................................................. 68
Keyboard keys function............................................................................................................................................. 69
Touchpad.............................................................................................................................................................................70
Bluetooth..............................................................................................................................................................................71
Chapter 4: Troubleshooting......................................................................................................... 73
Basic troubleshooting....................................................................................................................................................... 73
Power issues................................................................................................................................................................. 73
CROSH................................................................................................................................................................................. 77
Contents
Contents 3
CROSH commands............................................................................................................................................................77
Chrome commands........................................................................................................................................................... 79
Commonly used CROSH command.............................................................................................................................. 85
Check battery charging status.................................................................................................................................85
Reset Chromebook........................................................................................................................................................... 92
Recovery Chromebook.................................................................................................................................................... 95
Recovering the Chromebook....................................................................................................................................95
Chapter 5: Getting help and contacting Dell................................................................................ 98
4 Contents
Working on your computer
Topics:
•Before working inside your computer
•Safety precautions
•Electrostatic discharge—ESD protection
•ESD field service kit
•Transporting sensitive components
•Safety instructions
•Storing Chromebooks for long term - best practices
•After working inside your computer
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.
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 tabletnotebook 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.
1
Working on your computer 5
Unplugging, pressing and holding the power button for 20 seconds should discharge residual power in the system board.
Remove the battery from tablets.notebooks.
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.
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
6Working on your computer
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.
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.
Lifting equipment
Adhere to the following guidelines when lifting heavy weight equipment:
CAUTION: Do not lift greater than 50 pounds. Always obtain additional resources or use a mechanical lifting
device.
1. Get a firm balanced footing. Keep your feet apart for a stable base, and point your toes out.
2. Tighten stomach muscles. Abdominal muscles support your spine when you lift, offsetting the force of the load.
3. Lift with your legs, not your back.
4. Keep the load close. The closer it is to your spine, the less force it exerts on your back.
5. Keep your back upright, whether lifting or setting down the load. Do not add the weight of your body to the load. Avoid
twisting your body and back.
6. Follow the same techniques in reverse to set the load down.
Working on your computer 7
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
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: Disconnect all power sources before opening the computer cover or panels. After you finish working inside the
computer, replace all covers, panels, and screws before connecting to the power source.
CAUTION: Exercise caution when handling Lithium-ion batteries in laptops. Swollen batteries should not be used
and should be replaced and disposed properly.
NOTE: The color of your computer and certain components may appear differently than shown in this document.
Storing Chromebooks for long term - best practices
Prior to long term (Summer) storage:
1. Update to the latest version of the Chrome OS and charge your Chromebooks so that the battery is at least 80% full.
a. This ensures that even when the battery discharges while unplugged over the summer, it will not fully run out of power.
2. Connect the device to a charger and then turn it on.
3. Hold Refresh and Power keys at the same time.
4. While holding these keys, remove the power cable from the device and then release the keys. The device should shut down
and remain off.
5. Attempt to power the unit on, by pressing the power button. If the unit does not power on, you have completed the steps
and can safely store the system. If the unit powers on, you should repeat steps 2 to 4.
Upon redeploying:
1. Connect the Chromebooks to a charger and a power source, which will get them out of the battery disconnect state. Power
up your device.
2. Connect your Chromebooks to WiFi and update them to the latest Chrome OS release.
a. This can take time, as multiple Chrome OS versions may have been released since the last time the device was updated.
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
Removing and installing components
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Topics:
•Recommended tools
•Screw list
•Major components of your system
•Disassembly and reassembly
Recommended tools
The procedures in this document may require the following tools:
●Phillips #0 screwdriver
●Phillips #1 screwdriver
●Plastic scribe-Recommended for field technician
●Torx screwdriver (spec: T6)
Screw list
The table provides the list of screws that are used for securing different components.
Table 1. Screw list
Component Screw type Quantity Screw image
Base cover Captive screws
Torx screws
(M2.5x4+2.5)
NOTE: Systems
enabled with
4G LTE will
be shipped with
either captive/
Torx screws
(M2.5x4+2.5).
9
Battery M2x4 3
Input Output bracket M2x4 2
Input Output board M2x4 2 -For WiFi enabled systems
3 -For 4G LTE enabled
systems
System board M2x4 4
2
10 Removing and installing components
Table 1. Screw list (continued)
Component Screw type Quantity Screw image
Keyboard interposer
daughterboard
M2x4 2
Display assembly M2.5x5 6
WWAN card bracket - For 4G
LTE enabled systems only
M2x4 1
Wireless card bracket M2x3 1
Display cable bracket M2x4 1
Display bezel M2.5x3.8 4
Display panel M2x3 4
Display hinges M2.5x2.5
M2x3
4
2
Removing and installing components 11
Major components of your system
1. Base cover
2. System board
3. Battery
4. Speaker
5. Palmrest assembly
6. Display assembly
12 Removing and installing components
7. Input and output board
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.
Disassembly and reassembly
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Base cover
Removing the base cover with captive screws
Prerequisites
●Follow the procedure in before working inside your computer.
About this task
The following images indicate the location of the base cover, and provide a visual representation of the removal procedure.
NOTE: Systems enabled with 4G LTE will be shipped with either captive/Torx screws (M2.5x4+2.5).
Removing and installing components 13
Steps
1. Loosen the nine captive screws that secure the base cover to the computer chassis.
2. Use a plastic scribe to pry open the base cover, starting from the U-shaped indents at the top side of the base cover, and
then working along the sides.
NOTE: While removing the base cover, on-site technicians must take care to remove the base cover carefully. There are
prying recess points next to the left and right hinges which ease the disassembly procedure. With the help of a plastic
14 Removing and installing components
scribe, pry open from the upper left side of the base cover, continue working your way around the left and right side of
the base cover, then remove the base cover from the system.
3. Lift and remove the base cover from the computer chassis.
4. Disconnect the battery cable from the connector on the system board.
Installing the base cover with captive screws
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the base cover, and provide a visual representation of the installation procedure.
NOTE: Systems enabled with 4G LTE will be shipped with either captive/Torx screws (M2.5x4+2.5).
Removing and installing components 15
16 Removing and installing components
Steps
1. Connect the battery cable to the connector on the system board.
2. Align and place the base cover on the computer chassis, and snap the base cover latches into place.
3. Tighten the nine captive screws to secure the base cover to the computer chassis.
Next steps
●Follow the procedure in after working inside your computer.
Removing the base cover with Torx screws
Prerequisites
●Follow the procedure in before working inside your computer.
About this task
The following images indicate the location of the base cover, and provide a visual representation of the removal procedure.
NOTE: Systems enabled with 4G LTE will be shipped with either captive/Torx screws (M2.5x4+2.5).
Removing and installing components 17
Steps
1. Loosen the nine Torx screws (M2.5x4+2.5) that secure the base cover to the computer chassis.
2. Use a plastic scribe to pry open the base cover, starting from the U-shaped indents at the top side of the base cover, and
then working along the sides.
NOTE: While removing the base cover, on-site technicians must take care to remove the base cover carefully. There are
prying recess points next to the left and right hinges which ease the disassembly procedure. With the help of a plastic
18 Removing and installing components
scribe, pry open from the upper left side of the base cover, continue working your way around the left and right side of
the base cover, then remove the base cover from the system.
3. Lift and remove the base cover from the computer chassis.
4. Disconnect the battery cable from the connector on the system board.
Installing the base cover with Torx screws
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the base cover, and provide a visual representation of the installation procedure.
NOTE: Systems enabled with 4G LTE will be shipped with either captive/Torx screws (M2.5x4+2.5).
Removing and installing components 19
20 Removing and installing components
Steps
1. Connect the battery cable to the connector on the system board.
2. Align and place the base cover on the computer chassis, and snap the base cover latches into place.
3. Tighten the nine Torx screws (M2.5x4+2.5) to secure the base cover to the computer chassis.
Next steps
●Follow the procedure in after working inside your computer.
SIM card
Removing the SIM card
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
About this task
NOTE: The following steps are applicable only for 4G LTE enabled systems.
NOTE: The following steps are not applicable for systems configured with pre-installed SIM card.
WARNING: Do not press on the SIM card connector.
The following image indicates the location of the SIM card and provides a visual representation of the removal procedure.
Removing and installing components 21
Steps
1. Gently press the SIM card to release it from the SIM card slot.
2. Slide the SIM card out from the slot on the system board.
Installing the SIM card
About this task
NOTE: The following steps are applicable only for 4G LTE enabled systems.
NOTE: The following steps are not applicable for systems configured with pre-installed SIM card.
WARNING: Do not press on the SIM card connector.
If you are replacing a component, remove the existing component before performing the installation procedure. The following
image indicates the location of the SIM card and provides a visual representation of the installation procedure.
22 Removing and installing components
Steps
1. Align and slide the SIM card in the SIM card slot on the system board.
NOTE: Align the SIM card parallel to the system board. Insert the SIM card carefully in the direction of the SIM card
slot.
2. Gently press the SIM card until it clicks into place.
For more information on how to enable 4G in your Chromebook, refer Connect to a mobile data network.
Next steps
1. Install the base cover.
2. Follow the procedure in after working inside your computer.
WWAN card
Removing the WWAN card
Prerequisites
NOTE: The following steps are applicable only for 4G LTE enabled systems.
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
About this task
The following image indicates the location of the WWAN card and provides a visual representation of the removal procedure.
Removing and installing components 23
Steps
1. Remove the screw (M2x4) that secures the WWAN bracket to the WWAN card on the system board.
2. Remove the WWAN bracket from the WWAN card that secures the two antenna cables.
3. Disconnect the two antenna cables that are connected to the WWAN card.
4. Disconnect the WWAN card from its slot on the system board.
5. Lift and remove the WWAN card from the system board.
Installing the WWAN card
Prerequisites
NOTE: The following steps are applicable only for 4G LTE enabled systems.
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the WWAN card and provides a visual representation of the installation procedure.
24 Removing and installing components
Steps
1. Align and connect the WWAN card into the slot on the system board.
2. Connect the two antenna cables to the WWAN card.
3. Align and place the WWAN bracket on the WWAN card to secure the antenna cables in place.
4. Replace the screw (M2x4) to secure the WWAN bracket on the WWAN card to the system board..
Next steps
1. Install the base cover.
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 completely before removing it. Disconnect the AC power adapter from the system and
operate the computer solely on battery power—the battery is fully discharged when the computer no longer
turns on when the power button is pressed.
●Do not crush, drop, mutilate, or penetrate the battery with foreign objects.
Removing and installing components 25
●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.
Removing the battery
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
NOTE: If the battery is disconnected from system board, there is delay during computer boot as the computer undergoes
Real Time Clock (RTC) reset.
About this task
The following images indicate the location of the battery and provide a visual representation of the removal procedure.
26 Removing and installing components
Steps
1. Unroute the battery cable from the routing channel in the palmrest assembly.
2. Remove the three screws (M2x4) that secure the battery to the palmrest assembly.
3. Flip the adhesive tape on the bottom-left corner of the battery.
4. Peel the adhesive tape upward to release the battery from the double-sided sticker that secures the battery to the palmrest
assembly.
CAUTION: Do not pull outward on the tape as it would not release the battery and may damage the tape.
5. Remove the battery from the palmrest assembly.
Installing the battery
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Removing and installing components 27
About this task
NOTE: If the battery is disconnected from system board, there is delay during computer boot as the computer undergoes
Real Time Clock (RTC) reset.
The following image indicates the location of the battery and provides a visual representation of the installation procedure.
Steps
1. Align and place the battery into the slot on the palmrest assembly.
2. Adhere the adhesive tape to secure the battery to the palmrest assembly.
3. Replace the three screws (M2x3) to secure the battery into the palmrest assembly.
4. Route the battery cable through the routing channels in the palmrest assembly.
Next steps
1. Install the base cover.
2. Follow the procedure in after working inside your computer.
28 Removing and installing components
Keyboard
Removing the keyboard
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
About this task
The following images indicate the location of the keyboard, and provide a visual representation of the removal procedure.
Removing and installing components 29
Steps
1. Unroute the battery cable from the routing channel on the palmrest assembly.
2. Disconnect the keyboard Flexible Printed Circuits cable (FPC) from the connector on the system board.
3. Place the system on a flat surface with the keyboard facing up. Open the system to 180 degrees.
NOTE: The system will automatically power on when it is opened past 5-degree angle. Press the power button to turn
off the system and then proceed with the disassembly process.
4. Use a plastic scribe to release the keyboard from the two release holes in the system.
NOTE: The two release holes for the keyboard are indicated by the "KB" labeling.
5. Use a plastic scribe to carefully pry the keyboard from its latches in the palmrest assembly.
6. Lift and remove the keyboard from the palmrest assembly and carefully pull the keyboard FPC cable through the gap on the
palmrest assembly.
Installing the keyboard
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the keyboard, and provide a visual representation of the installation procedure.
30 Removing and installing components
Removing and installing components 31
Steps
1. Insert the keyboard FPC cable from the gap in the palmrest assembly.
2. Align the keyboard on the palmrest assembly. Gently press the keyboard and snap it into place.
3. Connect the keyboard FPC cable to the connector on the system board.
Next steps
1. Install the base cover.
2. Follow the procedure in after working inside your computer.
Display assembly
Removing the display assembly
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
3. Remove the WWAN card for 4G LTE enabled systems.
About this task
The following images indicate the location of the display assembly and provide a visual representation of the removal procedure.
32 Removing and installing components
Removing and installing components 33
Steps
1. Remove the screw (M2x3) that secures the WLAN bracket to the system board.
2. Remove the WLAN bracket from the system board.
3. Disconnect the two antenna cables that are connected to the WLAN module.
4. Remove the screw (M2x4) that secures the display cable bracket to the system board.
NOTE: The screw securing the display cable bracket also secures the left Input Output bracket to the system board,
as a result removal of the display cable bracket may leave the left Input Output bracket unsecured. Technicians should
therefore ensure that the left Input Output bracket is not moved or lost during any subsequent disassembly processes.
5. Lift and remove the display cable bracket from the system board.
6. Open the lock and disconnect the display cable.
7. Peel off the conductive tape that secures the display cable to the system board.
8. Open the system to 180 degrees and place the system on a flat surface, with the display hinges facing up.
9. Remove the six display hinge bracket screws (M2.5x5) that secure the display assembly to the system.
10. Lift and 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
The following images indicate the location of the display assembly and provides a visual representation of the installation
procedure.
34 Removing and installing components
Steps
1. Place the chassis on a plane surface.
2. Align the display assembly with the screw holders on the system.
3. Replace the six display hinge bracket screws (M2.5x5) to secure the display assembly to the system.
4. Lift the system and close the display.
5. Adhere the conductive tape to secure the display cable to the system board.
NOTE: For Chromebook 3100 models with LTE capabilities, the piece of conductive tape on display cable must be
adhered onto display hinge bracket and the display cable must be adhered onto the system board.
6. Connect the display cable to the connector on the system board and close the lock.
7. Place the display cable bracket to secure the display cable.
8. Replace the single (M2x4) screw that secures the display cable bracket to the system.
9. Connect the two antennas to the WLAN module
10. Align and place the WLAN bracket on the system board.
11. Replace the screw (M2x3) to secure the WLAN bracket on the system board.
Next steps
1. Install the WWAN card for 4G LTE enabled systems.
2. Install the base cover.
3. Follow the procedure in after working inside your computer.
Input Output board
Removing the Input Output board
Prerequisites
NOTE: Not all systems are configured with the Input Output board component. The Input Output board component
depends on the configuration being ordered.
Removing and installing components 35
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
3. Remove the WWAN card for 4G LTE enabled systems.
About this task
The following image indicates the location of the Input Output board and provide a visual representation of the removal
procedure.
Steps
1. Disconnect the Type-C power cable from the connector on the Input Output board.
2. For systems enabled with 4G LTE, disconnect the LTE signal cable from the connector on the Input Output board.
3. Open the latch and disconnect the 30-pin FFC and 40-pin FFC Input Output board cables from the connectors on the Input
Output board. Peel back the 30-pin FFC and the 40-pin FFC cables from the palmrest assembly.
4. For systems enabled with 4G LTE, open the latch and disconnect the 30-pin FPC and 40-pin FFC Input Output board cable
from the connectors on the Input Output board. Peel back the 30-pin FPC cable with conductive tape and the 40-pin FFC
cable from the palmrest assembly.
5. Remove the two screws (M2x4) that secure the Type-C bracket to the palmrest assembly.
6. Use a plastic scribe to peel off and remove the Type-C bracket from the palmrest assembly.
7. For systems enabled with 4G LTE, remove the three screws (M2x4) that secure the Input Output board to the palmrest
assembly.
8. For systems enabled with WiFi, remove the two screws (M2x4) that secure the Input Output board to the palmrest
assembly.
9. Lift and remove the Input Output board with the cables from the palmrest assembly.
36 Removing and installing components
Installing the Input Output board
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the Input Output board and provides a visual representation of the installation
procedure.
Steps
1. Place the Input Output board to its slot on the palmrest assembly.
2. Align and place the Type-C bracket on the Input Output board.
3. Replace the two screws (M2x4) that secure the Type-C bracket to its slot.
4. For systems enabled with 4G LTE, replace the three screws (M2x4) that secure the Input Output board to the palmrest
assembly.
5. For systems enabled with WiFi, replace the two screws (M2x4) that secure the Input Output board to the palmrest
assembly.
6. Connect the 30-pin FFC and 40-pin FFC Input Output board cables and close the latch to secure them to the Input Output
board. Adhere the 30-pin FFC and the 40-pin FFC cables onto the palmrest assembly.
7. For systems enabled with 4G LTE, connect the 30-pin FPC and 40-pin FFC Input Output board cables and close the latch to
secure them to the Input Output board. Adhere the 30-pin FPC cable with conductive tape and the 40-pin FFC cable onto
the palmrest assembly.
8. For systems enabled with 4G LTE, connect the LTE signal cable to the connector on the Input Output board.
Removing and installing components 37
9. Connect the Type-C power cable to the connector on the Input Output board. Adhere the Type-C power cable onto the
system board and Input Output board.
Next steps
1. Install the WWAN card for 4G LTE enabled systems.
2. Install the base cover.
3. Follow the procedure in after working inside your computer.
System board
Removing the system board
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
3. Remove the battery.
4. Remove the SIM card.
About this task
The following image indicates the connectors on your system board.
Figure 1. System-board connectors
1. 30-pin FFC Input Output board cable ( 30-pin FPC Input
Output board cable for systems enabled with 4G LTE)
2. LTE signal cable (For systems enabled with 4G LTE)
3. Display cable 4. 40-pin FFC Input Output board cable
5. Type-C power cable 6. Touchpad cable
7. Keyboard cable 8. Battery cable
9. Speaker cable
The following images indicate the location of the system board and provide a visual representation of the removal procedure.
NOTE: The following image is from 4G LTE enabled systems. For WiFi enabled systems, the system board has a different
configuration.
38 Removing and installing components
Removing and installing components 39
Steps
1. Remove the screw (M2x3) that secures the WLAN bracket to the system board.
2. Remove the WLAN bracket from the system board.
3. Disconnect the two antenna cables that are connected to the WLAN module.
4. For systems enabled with 4G LTE, disconnect the LTE signal cable from the connector on the system board.
5. Disconnect the 30-pin FFC and 40-pin FFC Input Output board cables from the connectors on the system board. Peel the
30-pin FFC and the 40-pin FFC cables.
6. For systems enabled with 4G LTE, disconnect the 30-pin FPC and 40-pin FFC Input Output board cables from the
connectors on the system board. Peel the 30-pin FPC cable with conductive tape and the 40-pin FFC cable.
7. Disconnect the Type-C power cable from the connector on the system board.
8. Open the latch and disconnect the touch pad FPC cable from the connector on the system board.
9. Open the latch and disconnect the keyboard FPC cable from the connector on the system board.
10. Disconnect the speaker cable from the connector on the system board.
11. Remove the screw (M2x4) that secures the display cable bracket to the system board. Lift and remove the display cable
bracket from the system board.
NOTE: The screw securing the display cable bracket also secures the left Input Output bracket to the system board,
as a result removal of the display cable bracket may leave the left Input Output bracket unsecured. Technicians should
therefore ensure that the left Input Output bracket is not moved or lost during any subsequent disassembly processes.
12. Open the latch and disconnect the display cable from its connector on the system board.
13. Use a plastic scribe to peel and remove the Type-C bracket from the chassis.
14. Remove the four screws (M2x4) that secure the system board in place.
15. Carefully lift and remove the system board from the left side.
40 Removing and installing components
Installing the system board
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the connectors on your system board.
Figure 2. System-board connectors
1. 30-pin FFC Input Output board cable ( 30-pin FPC Input
Output board cable for systems enabled with 4G LTE)
2. LTE signal cable (For systems enabled with 4G LTE)
3. Display cable 4. 40-pin FFC Input Output board cable
5. Type-C power cable 6. Touchpad cable
7. Keyboard cable 8. Battery cable
9. Speaker cable
The following images indicate the location of the system board and provide a visual representation of the installation procedure.
NOTE: The following image is from 4G LTE enabled systems. For WiFi enabled systems, the system board has a different
configuration.
Removing and installing components 41
42 Removing and installing components
Steps
1. Align and place the system board into the chassis.
2. Replace the four screws (M2x4) to secure the system board in place.
3. Replace the Type-C bracket on the chassis.
4. Connect the display cable to the connector on the system board and close the latch.
5. Replace the screw (M2x4) to secure the display cable bracket to the system board.
6. Connect the speaker cable to the connector on the system board.
7. Connect the keyboard FPC cable to the connector on the system board and close the latch.
8. Connect the Type-C power cable to the connector on the system board.
9. Connect the touch pad FPC cable to the connector on the system board and close the latch.
10. Connect the 30-pin FFC and 40-pin FFC Input Output board cables and close the latch to secure them to the system board.
Adhere the 30-pin FFC and the 40-pin FFC cables.
11. For systems enabled with 4G LTE, connect the 30-pin FPC and 40-pin FFC system board cables and close the latch to
secure them to the system board. Adhere the 30-pin FPC cable with conductive tape and the 40-pin FFC cable.
12. For systems enabled with 4G LTE, connect the LTE signal cable to the connector on the system board.
13. Connect the two antenna cables to the WLAN module.
14. Align and place the WLAN bracket to secure the antenna cables on the WLAN module.
15. Replace the screw (M2x3) to secure the WLAN bracket on the system board.
Next steps
1. Install the SIM card.
2. Install the battery.
3. Install the base cover.
4. Follow the procedure in after working inside your computer.
Removing and installing components 43
Speaker
Removing the speakers
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
3. Remove the battery.
About this task
The following image indicates the location of the speakers and provides a visual representation of the removal procedure.
Steps
1. Peel the adhesive tape that secures the speaker cable to the palmrest assembly.
2. Disconnect the speaker cable from the connector on the system board.
3. Peel the transparent tape that secures the speaker cable in place.
44 Removing and installing components
NOTE: While removing the speakers, technicians must first peel the clear transparent covering the speaker cable. If not
peeled, there is a risk of damaging the speaker cable while removing the speakers.
4. Unroute the speaker cable from retention clips in the routing channels at the bottom of the palmrest assembly.
5. Lift and remove the speakers from their slots on the palmrest assembly.
Installing the speaker
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the speaker and provides a visual representation of the installation procedure.
Steps
1. Place the speakers into the slots on the palmrest assembly.
2. Reroute the speaker cable through the retention clips in the routing channel.
Removing and installing components 45
NOTE: While installing the speakers onto the palmrest assembly, the speaker cables must be routed correctly into
the routing channels at the bottom of the palmrest assembly. If not routed properly, the speaker cables may become
pinched and damaged when replacing the base cover.
3. Connect the speaker cable to the connector on the system board.
4. Adhere the transparent tape to secure the speaker cable in place.
Next steps
1. Install the battery.
2. Install the base cover.
3. 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 base cover.
3. Remove the WWAN card for 4G LTE enabled systems.
4. Remove the display assembly.
About this task
The following images indicate the location of the display bezel and provide a visual representation of the removal procedure.
46 Removing and installing components
Removing and installing components 47
Steps
1. NOTE: The bezel screws are covered with disposable cosmetic mylar stickers that must not be peeled off before bezel
screw removal.
Use a blade to peel the four bezel sickers covering the screw.
2. Remove the four screws (M2.5x3.8) that secure the display bezel on the display assembly.
3. Use a plastic scribe to carefully pry open the upper right or upper left corners of the outer edge of the display bezel.
4. Use the scribe to pry open the outside edge of the top, left, and right sides of the display bezel.
NOTE: Carefully pry the display bezel as peeling the adhesive on display bezel can damage the display panel.
5. Use the scribe to pry open the inside edge of the top, left, right, and bottom side of the display bezel.
6. Lift and remove the display bezel from the display assembly.
Installing the display bezel
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following images indicate the location of the display bezel and provide a visual representation of the installation procedure.
48 Removing and installing components
Removing and installing components 49
Steps
1. Align the display bezel with the display assembly. Gently snap the display bezel into place.
2. Replace the four screws (M2.5x3.8) to secure the display bezel on the display assembly.
3. Adhere the stickers over the screws once the screws have been secured.
NOTE: A new set of stickers is included with any replacement display bezel. When replacing the new display bezel,
adhere the new stickers over the screws once the screws have been secured.
Next steps
1. Install the display assembly.
2. Install the WWAN card for 4G LTE enabled systems.
3. Install the base cover.
4. 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 base cover.
3. Remove the WWAN card for 4G LTE enabled systems.
4. Remove the display assembly.
5. Remove the display bezel.
50 Removing and installing components
About this task
The following images indicate the location of the display panel and provide a visual representation of the removal procedure.
Removing and installing components 51
Steps
1. Remove the four (M2x3) screws that secure the display panel to the display assembly.
2. Lift to turn over the display panel to access the display cable.
3. Peel the conductive tape covering the display cable connector.
4. Peel the clear tape covering the display cable connector.
5. Peel the rubber spacer covering the display cable.
6. Lift the latch and disconnect the display cable from the connector on the display panel.
Installing the display panel
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the display panel and provides a visual representation of the installation procedure.
52 Removing and installing components
Removing and installing components 53
Steps
1. Connect the display cable to the connector and close the latch.
2. Adhere the rubber spacer covering the display cable.
3. Adhere the conductive tape covering the display cable connector.
4. Adhere the clear tape to cover the display cable connector.
5. Insert the display panel tabs into the slots on the display cover.
6. Replace the four (M2x3) screws to secure the display panel to the display assembly.
Next steps
1. Install the display bezel.
2. Install the display assembly.
3. Install the WWAN card for 4G LTE enabled systems.
4. Install the base cover.
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 base cover.
3. Remove the WWAN card for 4G LTE enabled systems.
4. Remove the display assembly.
5. Remove the display bezel.
54 Removing and installing components
About this task
The following images indicate the location of the camera and provide a visual representation of the removal procedure.
Steps
1. Disconnect the camera cable from its connector on the camera.
2. Peel the conductive tape that secures the camera in place.
3. Use a plastic scribe to carefully pry the camera starting from the top side of the camera module.
4. Lift and remove the camera module from the display back cover.
Installing the camera
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the camera and provides a visual representation of the installation procedure.
Removing and installing components 55
Steps
1. Insert the camera into the slot on the display back cover.
2. Adhere the adhesive tape and secure the camera in place.
3. Connect the camera cable to the connector.
Next steps
1. Install the display bezel.
2. Install the display assembly.
3. Install the WWAN for 4G LTE enabled systems.
4. Install the base cover.
5. Follow the procedure in after working inside your computer.
Display hinges
Removing the display hinges
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
3. Remove the WWAN card for 4G LTE enabled systems.
4. Remove the display assembly.
5. Remove the display bezel.
6. Remove the display panel.
About this task
The following image indicates the location of the display hinges and provides a visual representation of the removal procedure.
56 Removing and installing components
Steps
1. Peel the conductive tape that secures the display cable in place from the left display hinge.
2. Remove the four (M2.5x2.5) and two (M2x3) screws that secure the left and right display hinges.
3. Remove the display hinges from the display back cover.
Installing the display hinges
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the display hinges and provides a visual representation of the installation
procedure.
Removing and installing components 57
Steps
1. Lower the display hinges on the display assembly.
2. Replace the four (M2.5x2.5) and two (M2x3) screws to secure the left and right display hinges to the display back cover.
3. Adhere the conductive tape to secure the display cable in place at the left display hinge.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WWAN card for 4G LTE enabled systems.
5. Install the base cover.
6. Follow the procedure in after working inside your computer.
58 Removing and installing components
Display cable
Removing the Display cable
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
3. Remove the WWAN card for 4G LTE enabled systems.
4. Remove the display assembly.
5. Remove the display bezel.
6. Remove the display panel.
About this task
The following image indicates the location of the display cable and provides a visual representation of the removal procedure.
Steps
1. Peel the tape that secures the display cable to the display back cover.
2. Unroute the display cable from its routing channel.
3. Remove the display cable from the display back cover.
Removing and installing components 59
Installing the display cable
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the display cable and provides a visual representation of the installation procedure.
Steps
1. Adhere the tape to securing the display cable to the display back cover.
2. Route the display cable through its routing channel.
Next steps
1. Install the display panel.
2. Install the display bezel.
3. Install the display assembly.
4. Install the WWAN card for 4G LTE enabled systems.
5. Install the base cover.
6. Follow the procedure in after working inside your computer.
60 Removing and installing components
Display back cover
Removing the display back-cover and antenna assembly
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
3. Remove the WWAN card for 4G LTE enabled systems.
4. Remove the display assembly.
5. Remove the display bezel.
6. Remove the display panel.
7. Remove the display hinges.
8. Remove the camera.
9. Remove the Display cable.
About this task
NOTE: The display back cover and antenna assembly cannot be further disassembled once all of the pre-removal parts
procedures are completed. If the WLAN (For WiFi enabled systems) and/or WWAN (For 4G LTE enabled systems) antenna
cables are malfunctioning and need to be replaced, replace the entire display back cover and antenna assembly.
The following images indicate the location of the display back-cover and antenna assembly and provide a visual representation
of the removal procedure.
Steps
After performing the preceding steps, you are left with the display back cover.
Installing the display back-cover and antenna assembly
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
Removing and installing components 61
About this task
The following image indicates the location of the coin-cell battery and provides a visual representation of the installation
procedure.
Steps
Place the display back-cover on a flat surface and perform the following steps to install the display back cover.
Next steps
1. Install the display cable.
2. Install the camera.
3. Install the display hinges.
4. Install the display panel.
5. Install the display bezel.
6. Install the display assembly.
7. Install the WWAN card for 4G LTE enabled systems.
8. Install the base cover.
9. Follow the procedure in after working inside your computer.
Palmrest assembly
Installing the palmrest assembly
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the palmrest assembly and provides a visual representation of the installation
procedure.
62 Removing and installing components
Steps
Place the palmrest assembly on a flat surface.
Next steps
1. Install the speakers.
2. Install the system board.
3. Install the Input Output board.
4. Install the display assembly.
5. Install the keyboard.
6. Install the WWAN card for 4G LTE enabled systems.
7. Install the battery.
8. Install the base cover.
9. Follow the procedure in after working inside your computer.
Removing palmrest assembly
Prerequisites
1. Follow the procedure in before working inside your computer.
2. Remove the base cover.
3. Remove the battery.
4. Remove WWAN card for 4G LTE enabled systems.
5. Remove keyboard.
6. Remove the display assembly.
7. Remove Input Output board.
8. Remove system board.
9. Remove speakers.
About this task
The following image indicates the location of the palmrest assembly and provide a visual representation of the removal
procedure.
Removing and installing components 63
Steps
The component you are left with is the palmrest assembly.
NOTE: The palmrest assembly cannot be further disassembled once all the pre-removal parts procedures are completed.
If the touchpad frame, touchpad support bracket, touchpad mylar, touchpad module, touchpad FFC, conductive tape, or
thermal pad are malfunctioning and need to be replaced, replace the entire palmrest assembly.
64 Removing and installing components
Technology and components
NOTE: Instructions provided in this section are applicable on computers shipped with Windows operating system. Windows
is factory-installed with this computer.
Topics:
•USB features
•USB Type-C
•Keyboard
•Touchpad
•Bluetooth
USB features
Universal Serial Bus, or USB, was introduced in 1996. It dramatically simplified the connection between host computers and
peripheral devices like mice, keyboards, external drivers, and printers.
Let's take a quick look on the USB evolution referencing to the table below.
Table 2. USB evolution
Type Data Transfer Rate Category Introduction Year
USB 2.0 480 Mbps High Speed 2000
USB 3.0/USB 3.1 Gen
1
5 Gbps Super Speed 2010
USB 3.1 Gen 2 10 Gbps Super Speed 2013
USB 3.0/USB 3.1 Gen 1 (SuperSpeed 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 3.0/USB 3.1 Gen 1 finally has the answer to the consumers' demands with a theoretically 10 times faster than its
predecessor. In a nutshell, USB 3.1 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 3.0/USB 3.1 Gen 1.
3
Technology and components 65
Speed
Currently, there are 3 speed modes defined by the latest USB 3.0/USB 3.1 Gen 1 specification. They are Super-Speed, Hi-Speed
and Full-Speed. The new SuperSpeed mode has a transfer rate of 4.8Gbps. 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 480Mbps and 12Mbps
respectively and are kept to maintain backward compatibility.
USB 3.0/USB 3.1 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 (refer to the picture below).
●USB 2.0 previously had four wires (power, ground, and a pair for differential data); USB 3.0/USB 3.1 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 3.0/USB 3.1 Gen 1 utilizes the bidirectional 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 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 320Mbps (40MB/s) — the actual
real-world maximum. Similarly, USB 3.0/USB 3.1 Gen 1 connections will never achieve 4.8Gbps. We will likely see a real-world
maximum rate of 400MB/s with overheads. At this speed, USB 3.0/USB 3.1 Gen 1 is a 10x improvement over USB 2.0.
Applications
USB 3.0/USB 3.1 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 SuperSpeed USB 3.0/USB 3.1 Gen 1 products:
●External Desktop USB 3.0/USB 3.1 Gen 1 Hard Drives
●Portable USB 3.0/USB 3.1 Gen 1 Hard Drives
●USB 3.0/USB 3.1 Gen 1 Drive Docks & Adapters
●USB 3.0/USB 3.1 Gen 1 Flash Drives & Readers
●USB 3.0/USB 3.1 Gen 1 Solid-state Drives
●USB 3.0/USB 3.1 Gen 1 RAIDs
●Optical Media Drives
●Multimedia Devices
●Networking
●USB 3.0/USB 3.1 Gen 1 Adapter Cards & Hubs
66 Technology and components
Compatibility
The good news is that USB 3.0/USB 3.1 Gen 1 has been carefully planned from the start to peacefully co-exist with USB 2.0.
First of all, while USB 3.0/USB 3.1 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 3.0/USB 3.1 Gen 1 cables and only come into contact when connected to a proper SuperSpeed USB connection.
Windows 10 will be bringing native support for USB 3.1 Gen 1 controllers. This is in contrast to previous versions of Windows,
which continue to require separate drivers for USB 3.0/USB 3.1 Gen 1 controllers.
USB Type-C
USB Type-C is a new, tiny physical connector. The connector itself can support various exciting new USB standards like USB 3.1
and USB power delivery (USB PD).
Alternate Mode
USB Type-C is a new connector standard that is very small. It is about a third the size of an old USB Type-A plug. This is
a single connector standard that every device should be able to use. USB Type-C ports can support a variety of different
protocols using “alternate modes,” which allows you to have adapters that can output HDMI, VGA, DisplayPort, or other types
of connections from that single USB port
USB Power Delivery
The USB PD specification is also closely intertwined with USB Type-C. Currently, smartphones, tablets, and other mobile
devices often use a USB connection to charge. A USB 2.0 connection provides up to 2.5 watts of power — that'll charge your
phone, but that's about it. A laptop might require up to 60 watts, for example. The USB Power Delivery specification ups this
power delivery to 100 watts. It's bi-directional, so a device can either send or receive power. And this power can be transferred
at the same time the device is transmitting data across the connection.
This could spell the end of all those proprietary laptop charging cables, with everything charging via a standard USB connection.
You could charge your laptop from one of those portable battery packs you charge your smartphones and other portable devices
from today. You could plug your laptop into an external display connected to a power cable, and that external display would
charge your laptop as you used it as an external display — all via the one little USB Type-C connection. To use this, the device
and the cable have to support USB Power Delivery. Just having a USB Type-C connection doesn't necessarily mean they do.
USB Type-C and USB 3.1
USB 3.1 is a new USB standard. USB 3's theoretical bandwidth is 5 Gbps, while USB 3.1's is 10 Gbps. That's double the
bandwidth, as fast as a first-generation Thunderbolt connector. USB Type-C isn't the same thing as USB 3.1. USB Type-C is just
a connector shape, and the underlying technology could just be USB 2 or USB 3.0. In fact, Nokia's N1 Android tablet uses a USB
Type-C connector, but underneath it's all USB 2.0 — not even USB 3.0. However, these technologies are closely related.
Thunderbolt over USB Type-C
Thunderbolt is a hardware interface that combines data, video, audio, and power in a single connection. Thunderbolt combines
PCI Express (PCIe) and DisplayPort (DP) into one serial signal, and additionally provides DC power, all in one cable. Thunderbolt
1 and Thunderbolt 2 use the same connector as miniDP (DisplayPort) to connect to peripherals, while Thunderbolt 3 uses a USB
Type-C connector.
Technology and components 67
Figure 3. Thunderbolt 1 and Thunderbolt 3
1. Thunderbolt 1 and Thunderbolt 2 (using a miniDP connector)
2. Thunderbolt 3 (using a USB Type-C connector)
Thunderbolt 3 over USB Type-C
Thunderbolt 3 brings Thunderbolt to USB Type-C at speeds up to 40 Gbps, creating one compact port that does it all -
delivering the fastest, most versatile connection to any dock, display or data device like an external hard drive. Thunderbolt 3
uses a USB Type-C connector/port to connect to supported peripherals.
1. Thunderbolt 3 uses USB Type-C connector and cables - It is compact and reversible
2. Thunderbolt 3 supports speed up to 40 Gbps
3. DisplayPort 1.4 – compatible with existing DisplayPort monitors, devices and cables
4. USB Power Delivery - Up to 130W on supported computers
Key Features of Thunderbolt 3 over USB Type-C
1. Thunderbolt, USB, DisplayPort and power on USB Type-C on a single cable (features vary between different products)
2. USB Type-C connector and cables which are compact and reversible
3. Supports Thunderbolt Networking (*varies between different products)
4. Supports up to 4K displays
5. Up to 40 Gbps
NOTE: Data transfer speed may vary between different devices.
Thunderbolt Icons
Figure 4. Thunderbolt Iconography Variations
Keyboard
Dell Chromebook 3100 keyboards have a few extra features to help you browse the web effortlessly and efficiently. The
keyboard contains a dedicated search key and a new row of web shortcut keys. A standard USB Windows keyboard
68 Technology and components
can also be used with the Chromebook, using the same keyboard shortcuts. The image below shows the keyboard
layout.
Keyboard keys function
The Chrome device keyboard is designed to help you get to the things you need the most. The table below is an overview of the
special keys on the top row of the keyboard:
Table 3. Special keys
Special keys
Go to the previous page in browser history
Go to the next page in browser history
Reload current page
Enter Immersive mode, which hides the tabs and launcher
Enter Overview mode, which shows all windows
Decrease screen brightness
Increase screen brightness
Mute
Decrease the volume
Technology and components 69
Table 3. Special keys (continued)
Special keys
Increase the volume
Search applications and the web at the same time. On a Chromebook, this key is on the side, where the Caps
Lock key is normally located.
Keyboard shortcut keys
Table 4. Shortcut keys
Function Combination keys
Page up Press Alt and the up arrow
Page down Press Alt and the down arrow
Home Press Ctrl+Alt, and the up arrow
End Press, Ctrl+Alt and the down arrow
Delete Press Alt+Backspace
Toggle the bookmark bar Ctrl+Shift+B
Search current webpage Ctrl+F
Open a new tab Ctrl+T
Open a new window Ctrl+N
Open the link that you clicked in a new background tab Press Alt and click a link
Switch to next tab Ctrl+Tab
Sign out of Google Account Ctrl+Shift+Q
Close current tab Ctrl+W
To see more shortcuts, simply press Ctrl+Alt+? To open the keyboard viewer on your screen.
Touchpad
This page contains information for Dell touchpad gestures.
The following table lists some gestures and actions supported by the Chromebook touchpad:
Table 5. Touch pad gestures
Touchpad gestures
Gestures Explanation
Simply move your finger across the touchpad.
70 Technology and components
Table 5. Touch pad gestures (continued)
Touchpad gestures
Press down on the lower half of the touchpad. Since tap-to-click is enabled by default, you can
quickly tap the touchpad to click.
Click the touchpad with two fingers.
Place two fingers on the touchpad and move them up and down to scroll vertically, left and right to
scroll horizontally. If you have Australian scrolling enabled, move two fingers up to scroll down. (It
works in the same way as say, your smartphone or tablet.) If you have multiple browser tabs open,
you can also swipe left and right with three fingers to quickly move between tabs.
Swipe Quickly move two fingers left or right to go backward or forward on web pages or while using apps.
Click the item you want to move with one finger. With a second finger, move the item. Release both
fingers to drop the item at its new location.
Bluetooth
This section outlines the instruction to pair a bluetooth device with your Chrome devices.
Bluetooth technology lets you connect devices wirelessly over short distances. To use the Bluetooth accessories with your
Chromebook, first check if your Chromebook supports Bluetooth. You will then need to pair it with the accessory.
To see if you can use the Bluetooth accessories with your Chromebook, click the status area in the lower right corner, where
your account picture appears. If you see the Bluetooth icon or in the menu, your Chromebook supports Bluetooth. If
you do not see either of these icons, your Chromebook does not support Bluetooth. If your Chromebook supports Bluetooth, it
can connect to a wide range of the Bluetooth accessories, including the following:
●Keyboards
●Mice
●Speakers
●Headphones
●Headsets (audio only)
To connect a Bluetooth device with your Chromebook, you need to pair them. Here is how:
1. Sign in to your Chromebook.
2. Click the status area in the lower-right corner, where your account picture appears.
Technology and components 71
3. Select your Bluetooth status in the menu that appears.
4. If Bluetooth is disconnected, click the disconnected icon. or click Enable Bluetooth in the menu. Your Chromebook will
automatically begin scanning for available Bluetooth devices.
5. Pick the device you want to add from the list of available Bluetooth devices and click Connect.
6. Follow the instructions on the screen to connect your Bluetooth device.
●If you are connecting a mouse, no PIN is normally required. If you are prompted for a PIN, enter the PIN for your mouse
using your Chrome device's keyboard.
●If you are connecting a keyboard, enter the randomly generated PIN on the keyboard you wish to pair and press Enter.
To confirm that your Bluetooth device is connected, check the Bluetooth status. You should see your device listed there.
NOTE: Just got your Chromebook or Chromebox? If you are turning on your chrome device for the first time and you have
a Bluetooth device nearby that is also turned on, your chrome device may automatically detect the device and show you
steps to pair it. You will see these instructions only if your chrome device does not already have a similar device connected
or its functionality is not built in, like a keyboard or trackpad.
72 Technology and components
Troubleshooting
Topics:
•Basic troubleshooting
•CROSH
•CROSH commands
•Chrome commands
•Commonly used CROSH command
•Reset Chromebook
•Recovery Chromebook
Basic troubleshooting
This page contains all the information for Dell Chromebook 3100 basic troubleshooting.
NOTE: Refer to Google Help Center for the online troubleshooter.
NOTE: Resetting the Chromebook, also known as Powerwash, can be attempted before Recovering the Chromebook.
Recovering the Chromebook is the last resort.
Power issues
Table 6. Power issue
Power issues
Issue Possible solutions
Chromebook would not Power On
If the Chromebook will not turn on, follow these steps:
1. Remove all external devices.
a. If the Chromebook starts, reconnect devices one at a
time while restarting the computer to figure out which
device is causing the problem. You are done.
b. If the Chromebook still does not start or exhibits
the same problem, do not reconnect anything, and
continue troubleshooting.
2. The battery life might be too low. Plug the Chromebook
into the AC adapter and let it charge for at least an hour
and try turning it on again.
NOTE: When a new Chromebook is used for the first
time, the battery is still in shipping mode. To resolve
this issue, turn off the Chromebook and plug in the AC
adapter and turn on the Chromebook again.
3. Depending on the Chromebook you have, you may see a
power indicator light close to the charging port. If you
have let the Chromebook charge and the light is not
coming on, perform a hard reset.
NOTE: You can perform a hard reset by pressing
Refresh + Power.
4. Use a different AC adapter with the same power voltage.
5. Remove the AC adapter, and turn on with the battery
power only.
4
Troubleshooting 73
Display issue
Table 7. Display issue
Display issue
Issue Possible solutions
Screen is Blank
If the Chromebook's screen is blank, try the following
troubleshooting steps to resolve the issue, checking to see
if the screen turns on after each step:
1. Make sure that the Chromebook is on. If you are using
the battery, plug the Chromebook in and press the power
button.
2. Restart the Chromebook by holding the power button
down until the device turns off, then turn it back on again.
3. Reset or Recover the Chromebook.
Audio, screen, and camera issues
Table 8. Audio, screen, and camera issues
Audio, screen, and camera issues
Issues Possible solutions
Audio issues
If you hear static, or the volume from the speakers is low
when attempting to listen to audio:
1. Make sure that the device is not muted. Try adjusting the
volume.
2. Try rebooting the Chromebook.
3. Try playing audio from various sources, including YouTube
and audio files stored locally on the Chromebook.
If the speakers are not responding when attempting to listen
to audio:
1. Unplug the device from all cables (USB, headphones, and
displays).
2. Try playing audio from various sources, including YouTube
and audio files stored locally on the Chromebook.
3. Try rebooting the Chromebook.
4. If audio still does not respond, try to Reset or Recover the
Chomebook.
Screen issues
If the screen is not operating properly (images are too dark or
no image is appearing):
1. Try adjusting the brightness with the brightness keys at
the top of the keyboard.
2. In the status area in the bottom-right of the screen, check
the display and make sure there are no issues with a
mirrored or extended display.
3. Try rebooting the Chromebook
4. If the screen issues persist, try to Reset or Recover the
Chomebook.
Camera issues
If the camera is not operating properly (blurry images or poor
performance):
1. Check that the camera is not being blocked or covered by
a privacy screen or other obstruction.
2. Try using different apps that use the camera. Try a
Google+ Hangout or the onboard camera app
3. Try rebooting the Chromebook
74 Troubleshooting
Table 8. Audio, screen, and camera issues (continued)
Audio, screen, and camera issues
4. If the camera issues persist, try to Reset or Recover the
Chomebook.
Bluetooth issue
Table 9. Bluetooth issue
Bluetooth issue
Issue Possible solutions
Bluetooth issues
If you run into issues while attempting to pair or use a
Bluetooth device with the Chromebook, try the following
steps to resolve the issue:
1. First, make sure that the Bluetooth device you are trying
to pair is supported by the Chromebook.
2. Try disabling and re-enabling Bluetooth connectivity from
the status area in the lower-right corner.
3. Try restarting the Chromebook.
4. If you are still encountering issue with bluetooth, try to
Reset or Recover the Chomebook.
Touchpad and Hotkeys issues
Table 10. Touchpad and hotkeys issues
Touchpad / Hotkeys issues
Issue Possible solutions
Touchpad not responding
If the touch pad has stopped responding, try the following
steps to resolve the issue: Try moving the cursor after each
step:
1. Tap the Esc key several times.
2. Drumroll the fingers across the touch pad for a few
seconds.
3. Restart the Chrome OS by holding down the power button
until the device turns off, and then turn it back on again.
4. If the cursor still does not move when using the touch pad,
try logging in from the Guest account using the tab key to
navigate.
5. If users experience touch pad issues with the account
that is not the owner (primary) account, delete the user
account and re-create it. Again, use the tab key to
navigate.
6. If none of the above steps work, try to Reset or Recover
the Chomebook.
Top row of keys (Hotkeys) not responding
If a hotkey (like the volume or brightness keys) are not
responding, try the following troubleshooting steps, making
sure to test the keys after each one:
1. If the affected key is volume or brightness, check to make
sure you are not at the upper or lower limit for that
setting.
2. If the backward or forward buttons do not work, check
that the same icons in a web browser are not grayed out.
For example, if the back button on a web page is grayed,
this is because the browser is not aware of a page to move
backward to.
Troubleshooting 75
Table 10. Touchpad and hotkeys issues (continued)
Touchpad / Hotkeys issues
3. Restart the Chrome OS by holding down the power button
until the device turns off, and then turn it back on again.
4. Try using the keys in the Guest account.
5. If users experience hotkey issues with the account that is
not the owner (primary) account, delete the user account
and re-create it.
6. If none of the above steps work, try to Reset or Recover
the Chomebook.
Chrome OS issue
Table 11. Chrome OS issue
Chrome OS issues
He’s Dead, Jim! error message
If the Chromebook becomes slow or unresponsive, and the
He's Dead, Jim! error message appears, the system could be
running low on memory.
NOTE: If you terminated the process using Google
Chrome's Task Manager, the system's task manager, or
with a command line tool, this message will appear as well.
1. If the page was not ended intentionally, reload the page to
continue. If the message continues to appear, try closing
inactive tabs or other programs to free up more memory.
2. If issue persists, please see He's Dead, Jim! from Google
knowledge base.
Chrome OS is missing or damaged
If the Chromebook does not start and displays the message,
Chrome OS is missing or damaged. Please insert a
recovery USB stick into the USB ports on the device:
Perform a system recovery. See performing Recover
Chromebook for more information.
Chrome OS stops responding and nothing moves on the
computer display
If the Chrome OS stops responding and nothing moves on the
computer display:
1. Turn off the computer.
2. Disconnect all peripheral devices, and remove all USB
devices and media cards.
3. Disconnect the AC adapter.
4. Press and hold the power button for 10 seconds.
5. Reconnect the AC adapter, and turn on the system.
6. If issue persists, please perform a Reset or Recover the
Chromebook.
Lost / Forget Sign in password (Chrome OS)
If you lost/forget the sign-in password to the Chromebook:
1. Check if this is a managed device (Enterprise enrolled
device).
a. If this is a managed device, please contact the
administrator to have them reset the password via
Google Admin Console.
b. If this is not a managed device, please proceed with
the following steps:
2. Sign in as guest or use a different PC.
3. Open an internet browser, and navigate to https://
www.google.com/accounts/recovery/
4. Select I do not know my password, and then enter the
email address that you use to sign in to Google.
76 Troubleshooting
Table 11. Chrome OS issue (continued)
Chrome OS issues
5. Click Continue and follow the on-screen instructions to
reset the password.
Other Chromebook lock up or freeze symptoms that are not
listed here
If none of the above symptoms match the Chromebook’s
issue, refer to Google Help Center for the online
troubleshooter and more help.
CROSH
This topic covers the information that you need to know for the Chrome Shell (CROSH). CROSH and the Google Chrome URL
commands provide some troubleshooting tools, information, and advanced settings.
The Chrome OS does not support ePSA, Dell BIOS, the F12 boot menu, or DellConnect. There are no preboot diagnostics.
All troubleshootings must be done inside the OS. Chrome Shell (CROSH) and the Chrome URL commands provide some
troubleshooting tools, information, and advanced settings. CROSH is a command line interface similar to the Linux BASH or
Windows command (cmd.exe) terminals. Chrome OS is based on Linux, but CROSH does not recognize most Linux commands.
The most useful commands for troubleshooting are memory test, storage_test_1, storage_test_2, ping, and tracepath. Ping
works differently than it does in Windows. By default, it repeats until you press <Ctrl> + <C>, and it does not show any
statistics. The tracepath command is similar to the Windows traceroute command. A detailed explanation of the commands can
be viewed below, by typing help, or help_advanced in CROSH.
1. Open the Chrome browser.
2. Press <Clrl> + <Alt> + <T> The interface appears as shown in the screenshot
below:
3. Type in the CROSH command for diagnostics. Type 'help' for a list of available commands. Type help_advanced to display
a complete list of commands for debugging purposes
Alternately, refer to CROSH Commands for the list of the CROSH commands available for diagnostics.
CROSH commands
The table below lists the available commands in Chrome Shell (CROSH).
Table 12. Help commands
Command Purpose
exit Exits the CROSH Shell.
help Displays this help.
help_advanced Displays the help for more advanced commands, which are
used for debugging.
Troubleshooting 77
Table 12. Help commands (continued)
Command Purpose
ping [-c count] [-i interval] [-n] [-s packetsize] [-W waittime] —
Sends ICMP ECHO_REQUEST packets to a network host. If
it is "gw", then the next hop gateway for the default route
is used. It works like the ping command on other operating
systems. Press <Clrt> + <C> to stop the ping process or halt
any other command in CROSH.
ssh [optional args...] — Starts the ssh subsystem if invoked
without any arguments. "ssh <user> <host>", "ssh
<user> <host> <port>", "ssh< user>@<host>". or "ssh
<user>@<host> <port>" connect without entering the
subsystem
ssh_forget_host Removes a host from the list of known ssh hosts. This
command displays a menu of known hosts and prompts for
the host to forget.
top Sets the chaps debug logging level. No arguments start
verbose logging
Table 13. Advanced help command
Command Purpose
battery_test[<test length>] Tests the battery discharge rate for a given number of
seconds. No argument defaults to a 300 s test.
bt_console [<agent capability>] Enters a Bluetooth debugging console. The Optional
argument specifies the capability of a pairing agent the
console provides; see the Bluetooth Core specification for
valid options.
chaps_debug [start|stop|<log_level>] Sets the chaps debug logging level. No arguments will start
verbose logging.
connectivity Shows connectivity status.
experimental_storage<status|enable|disable> Enables or disables experimental storage features.
ff_debug [<tag_expr>] [--help] [--list_valid_tags] [--reset] Adds and removes flimflam debugging tags.
memory_test Performs extensive memory testing on the available free
memory.
modem <command> [args...] Interacts with the 3G modem. Run modem help for detailed
help.
modem_set_carrier carrier-name Configures the modem for the specified carrier.
network_diag[--date] [--link] [--show-macs] [--wifi] [--
help] [--wifi-mon] <host>
Performs a suite of network diagnostics and saves a copy of
the output to your download directory
network_logging <wifi|cellular|ethernet> Enables a predefined set of tags useful for debugging the
specified device.
p2p_update [enable | disable] Enables or disables the peer-to-peer (P2P) sharing of updates
over the local network. This will both attempt to get updates
from other peers in the network and shares the downloaded
updates with them. Run this command without arguments to
see the current state.
rlz < status | enable | disable> Enables or disables RLZ.
rollback Attempts to roll back to the previous update cached on
your system. Only available on non-stable channels and non-
enterprise enrolled devices. Please note that this will power
wash your device.
78 Troubleshooting
Table 13. Advanced help command (continued)
Command Purpose
route [-n] [-6] Displays the routing tables.
set_apn [-n <network-id>] [-u <username>] [-p
<password>] <apn>
Sets the APN to use when connecting to the network
specified by <network-id>. If <network-id> is not specified,
use the network-id of the currently registered network.
set_apn - c Clears the APN to be used, so that the default APN is used
instead.
set_arpgw <true | false> Turns on the extra network state checking to make sure the
default gateway is reachable.
set_cellular_ppp [-u <username>] [-p <password>] Sets the PPP username and/or password for an existing
cellular connection. If neither -u nor -p is provided, this shows
the existing PPP username for the cellular connection.
set_cellular_ppp -c Clears any existing PPP username and PPP password for an
existing cellular connection.
sound <command> <argument> Low level sound configuration. Can be used to play/record
audio samples and enable beam forming on Pixel. sound
beamforming <on|off > will enable/disable the feature.
sound record [duration] will start recording. sound play
<filename> plays the recorded audio samples
storage_status Reads storage device SMART health status, vendor attributes,
and error logs.
storage_test_1 Performs a short offline SMART test.
storage_test_2 Performs an extensive readability test.
syslog <message> Logs a message to system log.
tpcontrol{status | taptoclick [on|off] sensitivity [1-5] | set
<property>< value>} tpcontrol {syntp [on|off]}
Allows the user to manually adjust advanced touchpad
settings.
tracepath [-n] <destination>[/port] Traces the path/route to a network host.
update_over_cellular [enable|disable] Enables or disables the auto updates over cellular networks.
Run without arguments to see the current state.
upload crashes Uploads available crash reports to the crash server.
wpa_debug [<debug_level>] [--help] [--list_valid_level] [--
reset]
Sets the wpa_supplicant debugging level.
xset m [acc_mult[/acc_div] [thr]] xset m default Tweaks the mouse acceleration rate.
xset r rate [delay [rate]] Tweaks the autorepeat rates. The delay is the number of
milliseconds before autorepeat starts. The rate is the number
of repeats per second.
xset r [keycode] < on|off > Turns autorepeat on/off. If a keycode is specified, it affects
only that key. If not specified, it affects global behavior.
Chrome commands
Chrome:// pages contain experimental features, diagnostic tools, and detailed statistics. They are hidden in Chrome's user
interface. Chrome://about page lists all Chrome's internal pages. To view all the commands, type chrome://about in the
Chrome browser URL as shown below:
Troubleshooting 79
Table 14. Chrome browser shortcuts
Purpose Browser Shortcut Explanation
System Information chrome://system/ "Who am I".. BIOS version, and so on
Basic Connectivity Diags chrome://diagnostics/ Test for NIC and Internet connection
Chrome Information chrome://version More "Who am I" type of stuff
Create Recovery USB Stick chrome://imageburner/ Google's version of DBAR/DBRM
Chrome Flags chrome://flags Experimental features beyond the scope
of what Dell supports
Memory Troubleshooting chrome://memory View running processes and memory
utilization
Module Load chrome://conflicts Shows conflicts of all modules loaded by
Chrome
Chrome Sync Status chrome://syncchrome://sync-
internals
Allows troubleshooting of connected
accounts
Connectivity Troubleshooting chrome://net-internals Comprehensive network/connectivity
diagnostics, including DNS analysis,
Waterfall and Bandwidth diagnostics,
and so on
Histogram chrome://histograms Actual work and I/O audit
Credits chrome://credits References to all module/libs
contributions and their respective wiki/
license URLs
Crash Reporting chrome://crashes Shows detailed crash report, if the
feature was enabled
Apps RAM Utilization chrome://appcache-internals Detailed memory usage for apps/
extensions, especially handy for 2 GB
Chromebooks
Following are the 12 most helpful chrome:// commands that you should know:
1. chrome://flags : From here you can enable some of the experimental features that are hidden in the Google Chrome
browser. Please note that as mentioned on this page, since these are experimental, these might not work as expected and
might cause issues. Enable these features, and use it at your own risk.
80 Troubleshooting
2. chrome://dns: This displays the list of host names for which the browser will pre-fetch the DNS records.
3. chrome://downloads: This is also available from the Menu > Downloads. Shortcut key is Ctrl+J.
4. chrome://extensions: This is also available from the Menu > Tools > Extensions.
Troubleshooting 81
5. chrome://bookmarks: This is also available from the Menu > Bookmarks > Bookmark Manager. Short cut key is
Ctrl+Shift+O.
6. chrome://history: This is also available from the Menu > History. Short cut key is Ctrl+H.
82 Troubleshooting
7. chrome://memory: This will redirect to “chrome://memory-redirect/”. This will display the memory used by the Google
Chrome browser. This also displays all the process related to browser with their PID, process name, and the memory it takes.
8. NOTE: Net-internals events viewer and related functionality has been removed. Please use Chrome://net-export to
save netlogs and the external Catapult netlog_viewer to view them.
chrome://net-internals: This displays all networking related information. Use this to capture network events generated by
the browser. You can also export this data. You can view DNS host resolver cache. One of the important features in this
feature is “Test”. If a URL failed to load, you can go to “chrome://net-internals” > click on “Tests” tab > type that URL
which failed, and click on “Start Test”, which does some test and report you why that URL failed. chrome://plugins/.
9. chrome://quota-internals: This gives information about the disk space quote used by the browser, including the
breakdown of how much space the individual websites took under temporary files.
Troubleshooting 83
10. chrome://sessions: This displays the number of sessions and magic list that are currently running.
11. chrome://settings: This is also available from the Menu > Options (on Windows), and Menu > Preferences (on Linux).
From here you can control various browser related settings.
12. chrome://sync-internals: This gives information about the Chrome sync feature, including the Sync URL used by Google,
and sync statistics.
84 Troubleshooting
Commonly used CROSH command
This page contains information about the most commonly used CROSH commands to diagnose the Dell Chromebook 3100.
Below are some of the most commonly used CROSH commands to troubleshoot a hardware issue.
NOTE: CROSH storage_test_1 and storage_test_2 are not supported on the eMMC storage device.
Check battery charging status
The Chrome Shell (CROSH) includes a simple battery health diagnostic test. This is to confirm that the battery is charging and
to check on the battery health and discharge rate. Follow the instruction provided to check on the battery charging status:
1. Connect the AC adapter to the Chromebook and a power outlet.
2. Turn on, and sign in to the Chromebook.
3. Open the Chrome browser.
4. Press CTRL + ALT + T to open CROSH.
Troubleshooting 85
5. Type battery_test 1 into CROSH, and then press Enter.
6. Check the result to confirm that the battery is charging.
Check battery health
Follow the steps to evaluate the health of the Chromebook battery, and check the discharge rate:
1. Disconnect the AC adapter from the Chromebook.
2. Turn on and sign in to Chromebook.
3. Open the Chrome browser.
86 Troubleshooting
4. Press CTRL + ALT + T to open CROSH.
5. Type battery_test 1 into CROSH, and then press Enter.
6. A screen displays the current battery health and discharge rate.
●If the Battery health percentage is greater than 50%, the battery is within the expected wear limits.
●If the Battery health percentage is equal to or less than 50% and the battery is less than a year old, the battery is outside
expected wear limits and might need to be replaced.
●If the test results show that Battery is Unknown, the battery might need to be replaced.
Troubleshooting 87
Checking memory
Follow the steps below to perform a memory check for Chromebook:
NOTE: This will approximately take 20 minutes to complete the test, and it also depends on the capacity of the memory.
1. Turn on and sign in to Chromebook.
2. Open the Chrome browser.
3. Press CTRL + ALT + T to open CROSH.
4. Type memory_test into CROSH, and then press Enter.
88 Troubleshooting
5. A diagnostic screen displays the result of the memory test passed without any errors.
Example of a memory test failure.
Checking network status
If you are having trouble connecting to the Internet, use the steps in one or more of the following sections to test the network
adapter:
Troubleshooting 89
Follow the instruction to gather the information about the network and diagnose the network errors.
1. Turn on and sign in to Chromebook.
2. Open the Chrome browser.
3. Press CTRL + ALT + T to open CROSH.
4. Type network_diag into CROSH, and then press Enter.
90 Troubleshooting
5. Wait while CROSH performs a set of network diagnostic tests. A diagnostic screen displays the results of the network
adapter health test.
6. The diagnostic test log is saved as a.txt (plain text) file in the Files app.
Troubleshooting 91
7. If the diagnostic test returns a failure message, make sure the Wi-Fi adapter is enabled and connect to a network.
Reset Chromebook
This page contains all information about resetting Dell Chromebook 3100.
All local user data stored on the Chromebook can be cleared by resetting it to its original factory state (also known as
Powerwash).
This step might be helpful if you want to reset owner permissions or if you are experiencing issues with your user profile.
NOTE: All data stored on your Chromebook such as downloaded files, photos, owner permissions, and saved networks, will
be deleted for all accounts when performing a factory reset. After clearing this data, you will be guided through the initial
setup again. Resetting your device will not affect your accounts themselves, or any data synced to these accounts.
NOTE: Do not follow the instructions below if you're using a managed Chrome device, as you will not be able to re-enroll
your device after powerwashing it.
Follow these steps to reset your Chromebook to its original factory state:
1. Click the status area in the lower-right corner, where your account picture appears.
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2. Click Settings as highlighted from the screenshot below.
3. Click Show advanced settings to expand the menu.
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4. Click the Powerwash button.
5. Click Restart when prompted.
You can also reset your Chromebook from the sign-in screen by holding down the keys Ctrl+Alt+Shift+R and clicking
Restart. (If you are signed in to your Chromebook, sign out first before you press on Ctrl+Alt+Shift+R, then click Restart.
Once the Chromebook is restarted, click Reset.)
After you restart the Chromebook, you should now see the setup screen. Follow the instructions on the screen to set up your
Chromebook again. Make sure you sign in with your primary Google Account, because this account is set as the owner account.
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Recovery Chromebook
This page contains information about recovering Dell Chromebook 3100.
Recovering the Chromebook
Install a new version of the Chrome operating system on your Chromebook by going through the recovery process. You may
want to go through this process if you are having problems updating your Chromebook or if it stops working.
NOTE: All account information and data stored on your Chromebook, such as photos, downloaded files, and saved
networks, will be deleted. Owner privileges for your primary account will also be reset. However, the actual Google
Accounts and any data synced to these accounts are not affected by the recovery process. After the recovery process is
complete, you will be guided through the initial setup again.
Prerequisites:
Before starting this process, you need the following:
●A Chrome device, Windows, Mac, or the Linux computer with administrative rights.
●A 4 GB or larger USB flash drive or SD card that you do not mind clearing.
Step 1- Check for the Chrome OS is missing or damaged message
If you see this message, you can first try to perform a hard reset on your Chromebook by pressing Refresh + Power. If you still
see this message after performing a hard reset, please proceed to Step 2.
If you see the Chrome OS verification is turned off message, refer to Chrome OS verification is turned off section below.
Step 2- Create the recovery USB flash drive or SD card
Insert a USB flash drive or SD card into your computer and follow the instructions below
Table 15. USB flash drive or SD card
Operating System Instructions
Chrome Device Instructions
Create a recovery flash drive by using the Image Burner. The
tool may not be available in all languages.
1. Type chrome://imageburner into the omnibox (browser's
address bar) .
2. Run the tool and follow the instructions that appear on
your screen.
NOTE: When recovering your Chromebook, make sure to
create the recovery flash drive on the same model.
Windows Instructions
1. Click this link to download the Recovery Tool. If you
are a network administrator for your school, business, or
organization, click this link to download the Recovery Tool:
2. 3.
2. Run the tool and follow the instructions that appear on
your screen.
3. After you recover your Chromebook, you must format your
USB flash drive or SD card using the Recovery Tool. If you
do not format your USB flash drive or SD card, you will
not be able to use all the storage space on your external
device. Additionally, your USB flash drive or SD card may
not be recognizable by Windows.
Mac Instructions
Create a recovery flash drive by using the Recovery Tool. The
tool may not be available in all languages.
1. Click this link to download the Recovery Tool.
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Table 15. USB flash drive or SD card (continued)
Operating System Instructions
2. Run the tool and follow the instructions that appear on
your screen.
After the process is complete, you might see an alert saying
your USB drive or SD card is unreadable. If this fails, try
removing and reinserting your USB drive or SD card. Your USB
drive or SD card should now be ready to use for recovery.
Linux Instructions
Create a recovery flash drive by using the Recovery Tool. The
tool may not be available in all languages.
1. 1.Click this link to download the Recovery Tool.
2. Modify the script permissions to allow execution with
the following command: $ & sudo chmod 755
linux_recovery.sh
3. Run the script with root privileges with the following
command:$ sudo bash linux_recovery.sh
4. Follow the prompts from the tool to complete building the
operating system image.
Reinstall the Chrome Operating System
1. Start your Chromebook.
2. When the Chrome OS is missing or damaged screen appears, insert the USB flash drive or SD card you created into the
USB port or SD card slot on your Chrome device
3. Wait for the Chromebook to boot up from the flash drive
4. Follow the instructions that appear on the screen.
5. On successful installation of the Chrome operating system, you will be prompted to remove the USB flash drive or SD card.
6. Remove the USB flash drive or SD card when prompted, and your Chromebook will automatically restart.
You should now be able to start your Chromebook as normal. Because the data stored on your Chromebook has been cleared,
you will need to go through the initial setup again. Make sure you sign in with your primary Google Account, because this
account will be set as the owner account.
Chrome OS verification is turned off Message
By default, Chromebooks are set to the normal user mode. If you've set the user mode to developer mode instead, you'll see a
screen with the message "Chrome OS verification is turned off" when you start up. Use the developer mode if you want to test
your own version of the Chrome operating system.
Press Ctrl+D to enter developer mode. If you press the space bar instead, you'll see a screen asking to recover your device.
Troubleshooting Tips
Table 16. Troubleshooting tips
Question Solution
I am unable to recover my Chromebook To help ensure that you are running the latest version
of Chrome OS once you recover your Chromebook, we
recommend creating the recovery media with the latest
version of Chrome OS and avoid using recovery media that
may contain an older version of the operating system.
An error message An unexpected error has occurred. Try the following steps:
1. Confirm that you successfully completed all instructions
exactly as specified in Step 2: Create the recovery USB
flash drive or SD card above.
2. Try using a different USB stick or SD card.
96 Troubleshooting
Table 16. Troubleshooting tips (continued)
Question Solution
3. If the problem persists, contact Google Chrome support
team.
An error message You are using an out-of-date Chrome
OS recovery image.
You should download an up-to date recovery image. Simply
follow all the instructions exactly as specified in Step 2 above.
You successfully recovered your Chromebook but now you
can not use your USB or SD card with Windows
After you have completed recovery, you need to format your
USB or SD card using the recovery tool.
You successfully recovered your Chromebook but now
Windows does not recognize the whole size of the USB or
SD card used for recover.
After you have completed recovery, you need to format your
USB or SD card using the recovery tool.
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Getting help and contacting Dell
Self-help resources
You can get information and help on Dell products and services using these self-help resources:
Table 17. Self-help resources
Self-help resources Resource location
Information about Dell products and services www.dell.com
My Dell app
Tips
Contact Support In Windows search, type Contact Support, and press
Enter.
Online help for operating system www.dell.com/support/windows
Access top solutions, diagnostics, drivers and downloads, and
learn more about your computer through videos, manuals and
documents.
Your Dell computer is uniquely identified by a Service Tag or
Express Service Code. To view relevant support resources for
your Dell computer, enter the Service Tag or Express Service
Code at www.dell.com/support.
For more information on how to find the Service Tag for your
computer, see Locate the Service Tag on your computer.
Dell knowledge base articles for a variety of computer
concerns
1. Go to www.dell.com/support.
2. On the menu bar at the top of the Support page, select
Support > Knowledge Base.
3. In the Search field on the Knowledge Base page, type the
keyword, topic, or model number, and then click or tap the
search icon to view the related articles.
Contacting Dell
To contact Dell for sales, technical support, or customer service issues, see www.dell.com/contactdell.
NOTE: Availability varies by country/region and product, and some services may not be available in your country/region.
NOTE: If you do not have an active Internet connection, you can find contact information about your purchase invoice,
packing slip, bill, or Dell product catalog.
5
98 Getting help and contacting Dell