Table of Contents
- Chromebook 11 3380 Disassembly and Reassembly Guide - For use by Dell Certified Technicians only
- Working on your computer
- Removing and installing components
- Product Specifications
- Software
- Technology and components
- Diagnostics and Troubleshooting
- Contacting Dell
DELL 3380 User Manual
Displayed below is the user manual for 3380 by DELL which is a product in the Notebooks category. This manual has pages.
Related Manuals
Chromebook 11 3380
Disassembly and Reassembly Guide - For use by Dell
Certied Technicians only
Regulatory Model: P80G
Regulatory Type: P80G002
Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
© 2017 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.
2017 - 02
Rev. A00
Contents
1 Working on your computer............................................................................................................................. 6
Safety instructions............................................................................................................................................................. 6
Before working inside your computer..............................................................................................................................6
After working inside your computer.................................................................................................................................7
2 Removing and installing components............................................................................................................. 8
Recommended tools.......................................................................................................................................................... 8
microSD card...................................................................................................................................................................... 8
Removing microSD card..............................................................................................................................................8
Installing microSD card................................................................................................................................................ 8
Base cover.......................................................................................................................................................................... 8
Removing the base cover........................................................................................................................................... 8
Installing base cover................................................................................................................................................... 10
Battery............................................................................................................................................................................... 10
Removing the battery................................................................................................................................................ 10
Installing the battery....................................................................................................................................................11
Heat sink.............................................................................................................................................................................11
Removing the heatsink............................................................................................................................................... 11
Installing the heatsink.................................................................................................................................................12
System Fan........................................................................................................................................................................12
Removing the system fan.......................................................................................................................................... 12
Installing the system fan............................................................................................................................................ 13
Audio board........................................................................................................................................................................13
Removing the audio board.........................................................................................................................................13
Installing the audio board........................................................................................................................................... 14
Speakers............................................................................................................................................................................ 14
Removing the speakers..............................................................................................................................................14
Installing the speakers................................................................................................................................................16
Touchpad panel.................................................................................................................................................................16
Removing the touchpad............................................................................................................................................ 16
Installing the touchpad...............................................................................................................................................19
System board.................................................................................................................................................................... 19
Removing the system board......................................................................................................................................19
Installing the system board....................................................................................................................................... 23
Display assembly.............................................................................................................................................................. 23
Removing the display assembly................................................................................................................................23
Installing the display assembly..................................................................................................................................26
Hinge Cap..........................................................................................................................................................................27
Removing the hinge cap............................................................................................................................................27
Installing the hinge cap..............................................................................................................................................27
LCD Bezel..........................................................................................................................................................................28
Removing the LCD Bezel.......................................................................................................................................... 28
Installing LCD Bezel................................................................................................................................................... 29
Contents 3
LCD Panel......................................................................................................................................................................... 29
Removing the LCD Panel..........................................................................................................................................29
Installing the LCD Panel............................................................................................................................................. 31
Camera.............................................................................................................................................................................. 32
Removing the camera............................................................................................................................................... 32
Installing the camera..................................................................................................................................................32
LCD Hinge.........................................................................................................................................................................33
Removing the LCD Hinge......................................................................................................................................... 33
Installing the LCD Hinge............................................................................................................................................34
Keyboard........................................................................................................................................................................... 34
Removing the keyboard............................................................................................................................................ 34
Installing the keyboard...............................................................................................................................................37
Palm rest........................................................................................................................................................................... 37
Removing the palmrest..............................................................................................................................................37
3 Product Specications.................................................................................................................................39
4 Software...................................................................................................................................................... 41
Operating System.............................................................................................................................................................41
Chrome OS..................................................................................................................................................................41
Veried Boot...............................................................................................................................................................42
Disk Partition Map......................................................................................................................................................43
Developer and Recovery Mode................................................................................................................................45
Coreboot + U-boot Custom Firmware.................................................................................................................... 45
Chromium OS vs ChromeOS....................................................................................................................................46
View system information.................................................................................................................................................46
Dell activity light...............................................................................................................................................................48
Overview.....................................................................................................................................................................48
Raise your Hand/Answer Question/Discussion buttons.......................................................................................49
MultiColor Poll ...........................................................................................................................................................50
5 Technology and components........................................................................................................................ 51
Keyboard............................................................................................................................................................................ 51
Keyboard keys function..............................................................................................................................................51
Touchpad.......................................................................................................................................................................... 55
Integrated Microphone....................................................................................................................................................56
Key features................................................................................................................................................................57
Typical applications.....................................................................................................................................................57
6 Diagnostics and Troubleshooting................................................................................................................. 58
Bluetooth.......................................................................................................................................................................... 58
Basic troubleshooting......................................................................................................................................................58
Power issues...............................................................................................................................................................59
Chrome commands..........................................................................................................................................................63
CROSH..............................................................................................................................................................................68
CROSH commands................................................................................................................................................... 69
Commonly used CROSH command......................................................................................................................... 71
4Contents
Reset Chromebook.......................................................................................................................................................... 72
Recovering Chromebook.................................................................................................................................................72
Recovering the Chromebook....................................................................................................................................72
7 Contacting Dell............................................................................................................................................ 76
Contents 5
Working on your computer
Safety instructions
Use the following safety guidelines to protect your computer from potential damage and to ensure your personal safety. Unless otherwise
noted, each procedure included in this document assumes that the following conditions exist:
• You have read the safety information that shipped with your computer.
• A component can be replaced or, if purchased separately, installed by performing the removal procedure in reverse order.
WARNING: Disconnect all power sources before opening the computer cover or panels. After you nish working inside the
computer, replace all covers, panels, and screws before connecting to the power source.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional
safety best practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance
CAUTION: Many repairs may only be done by a certied 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, such as a connector on the back of the computer.
CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its
edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by its pins.
CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have
connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the
cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also, before you connect a
cable, ensure that both connectors are correctly oriented and aligned.
NOTE: The color of your computer and certain components may appear dierently than shown in this document.
Before working inside your computer
1 Ensure that your work surface is at and clean to prevent the computer cover from being scratched.
2 Turn o your computer.
3 If the computer is connected to a docking device (docked), undock it.
CAUTION: To disconnect a network cable, rst unplug the cable from your computer and then unplug the cable from
the network device.
4 Disconnect all network cables from the computer.
5 Disconnect your computer and all attached devices from their electrical outlets.
6 Close the display and turn the computer upside-down on a at work surface.
NOTE: To avoid damaging the system board, you must remove the main battery before you service the computer.
7 Remove the base cover.
8 Remove the main battery.
9 Turn the computer top-side up.
10 Open the display.
1
6 Working on your computer
11 Press and hold the power button for few seconds, to ground the system board.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the
display.
CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface,
such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to
dissipate static electricity, which could harm internal components.
12 Remove any installed ExpressCards or Smart Cards from the appropriate slots.
After working inside your computer
After you complete any replacement procedure, ensure you connect any external devices, cards, and cables before turning on your
computer.
CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries
designed for other Dell computers.
1 Replace the battery.
2 Replace the base cover.
3 Connect any external devices, such as a port replicator or media base, and replace any cards, such as an ExpressCard.
4 Connect any telephone or network cables to your computer.
CAUTION: To connect a network cable, rst plug the cable into the network device and then plug it into the
computer.
5 Connect your computer and all attached devices to their electrical outlets.
6 Turn on your computer.
Working on your computer 7
Removing and installing components
This section provides detailed information on how to remove or install the components from your computer.
Recommended tools
The procedures in this document require the following tools:
• Phillips #0 screwdriver
• Phillips #1 screwdriver
• Plastic scribe
microSD card
Removing microSD card
1 Follow the procedure in Before working inside your computer.
2 Press in on the microSD card to release it from the computer.
3 Remove the microSD card from the computer.
Installing microSD card
1 Slide the microSD card into its slot until it clicks into place.
2 Follow the procedure in After working inside your computer.
Base cover
Removing the base cover
1 Follow the procedure in Before working inside your computer.
2 To remove the base cover:
a Using a screwdriver, rst remove the Mylar caps and then remove the two middle screws.
b Loosen the M2.5xL8.5 captive screws that secure the base cover to the computer [2].
2
8 Removing and installing components
3 Using a plastic scribe, pry and lift the base cover away from the computer.
Removing and installing components 9
Installing base cover
1 Align the base cover with the screw holders on the computer.
2 Press the edges of the cover until it clicks into place.
3 Tighten the two middle screws.
4 Tighten the M2.5xL8.5 screws to secure the base cover to the computer.
5 Follow the procedure in After working inside your computer.
Battery
Removing the battery
1 Follow the procedure in Before working inside your computer.
2 Remove the base cover
3 To remove the battery:
a Disconnect the battery cable from the connector on the system board [1].
b Remove the M2.0x3.0 screws that secure the battery to the computer [2].
c Lift the battery away from the computer [3].
10 Removing and installing components
Installing the battery
1 Insert the battery into the slot on the computer.
2 Connect the battery cable to the connector on the battery.
3 Tighten the M2.0xL3 screws to secure the battery to the computer.
4 Install the base cover
5 Follow the procedure in After working inside your computer.
Heat sink
Removing the heatsink
1 Follow the procedure in Before working inside your computer.
2 Remove the:
amicroSD card
bbase cover
cbattery
3 To remove the heatsink:
a Remove the M2.5x2.5 screws that secure heat sink to the computer [1].
b Lift the heatsink away from the computer [2].
Removing and installing components 11
Installing the heatsink
1 Insert the heatsink into the slot on the computer.
2 Tighten the M2.5x2.5 screws to secure the heatsink to the computer.
3 Install the:
abattery
bbase cover
cmicroSD card
4 Follow the procedure in After working inside your computer.
System Fan
Removing the system fan
1 Follow the procedure in Before working inside your computer.
2 Remove the:
amicroSD card
bbase cover
cbattery
3 To remove the system fan:
a Unroute the WLAN cable from the routing on the system fan [1].
b Disconnect the fan cable from the connector on the system board [2].
4 Remove the M2xL3 screws that secure the fan to the system board [1].
5 Lift the system fan o the system board [3].
12 Removing and installing components
Installing the system fan
1 Place the fan on the system board.
2 Tighten the M2xL3 screws to secure the fan to the system board.
3 Connect the fan cable to its connector on the system board.
4 Route the WLAN cable onto its routing on the fan.
5 Install the:
abattery
bbase cover
cmicroSD card
6 Follow the procedure in After working inside your computer.
Audio board
Removing the audio board
1 Follow the procedure in Before working inside your computer.
2 Remove the:
amicrSD card
bbase cover
cbattery
3 To remove the audio board:
a Disconnect the audio board cable from its connector on the system board [1]
b Lift and peel o the black adhesive tape to remove the cable from the system board [2].
c Remove the M2xL3 screw that secures the audio board to the system board [3].
Removing and installing components 13
d Lift and remove the audio board from the system [4].
Installing the audio board
1 Place the audio board in its place on the computer.
2 Tighten the M2xL3 screw to secure the audio board to the computer.
3 Ax the cable adhesive to the computer.
4 Reconnect the audio board cable to its connector on the system board.
5 Install the:
abattery
bbase cover
cmicroSD card
6 Follow the procedure in After working inside your computer.
Speakers
Removing the speakers
1 Follow the procedure in Before working inside your computer.
2 Remove the:
amicroSD card
bbase cover
cbattery
14 Removing and installing components
3 To remove the speaker:
a Disconnect the speaker cable from the connector on the system board [1].
b Lift the speaker cable o from the cable guide [2].
c Remove the adhesive tape that secures the speaker cable to the computer [3].
d Unroute the speaker cable from the routing channel [4].
4 Remove the speakers from the computer.
Removing and installing components 15
Installing the speakers
1 Place the speakers into the slots on the computer.
2 Route the speaker cable through the routing channel.
3 Ax the adhesive tape to secure the speaker cable to the computer.
4 Connect the speaker cable to the connector on the system board.
5 Install the:
abattery
bbase cover
cmicroSD card
6 Follow the procedure in After working inside your computer.
Touchpad panel
Removing the touchpad
1 Follow the procedure in Before working inside your computer.
2 Remove the:
amicroSD card
bbase cover
cbattery
3 To remove touchpad cable:
a Lift the latch and disconnect the touchpad cable from the computer [1].
b Lift the touchpad cable o from the system board [2].
16 Removing and installing components
4 Remove the M2xL3 screws that secure the metal bracket to the touchpad on the computer.
5 Peel o the adhesive tapes [1] and [2] and then remove the metal bracket from the system [3].
Removing and installing components 17
6 Remove the M2xL3 screws that secure the touchpad to the system [1] and then lift the touchpad from the system [2].
18 Removing and installing components
Installing the touchpad
1 Place the touchpad into the slots on the computer.
2 Tighten the M2xL3 screws that secure the touchpad to the system.
3 Ax the adhesive tape that secures the touchpad cable to the touchpad.
4 Place the metal bracket and tighten the M2xL3 screws that secure the metal bracket to the touchpad..
5 Connect the touchpad cable to its connector on the system board.
6 Install the:
abattery
bbase cover
cmicroSD card
7 Follow the procedure in After working inside your computer.
System board
Removing the system board
1 Follow the procedure in Before working inside your computer.
2 Remove the:
amicroSD card
bbase cover
cbattery
ddisplay assembly
3 Disconnect the following cables from their connectors:
a WLAN antenna cables from the WLAN card [1].
b Touchpad cable from its connector on the system board [2].
c Keyboard cable from its connector on the system board [3].
Removing and installing components 19
4 Then,
a Remove the screw on the metal bracket covering the display cable connector [1].
b Lift the metal bracket o the display cable connector [2].
c Disconnect the display cable from its connector on the system board [3].
d Remove the screw securing the retaining metal bracket to the system board [4].
e Lift the retaining metal bracket o the system board [5].
20 Removing and installing components
5 Then:
a Disconnect the <engineering input> from its connector on the system board [1].
b Disconnect the audio board connector [2] and peel o the adhesive securing the cable to the system board [3].
c Disconnect the speaker cable from its connector [4] and unroute the cable from the cable guide [5].
Removing and installing components 21
6 Remove the M2xL3 screws and lift the system board o the computer.
22 Removing and installing components
Installing the system board
1 Align the system board with the screw holders on the computer.
2 Tighten the M2xL3 screws to secure the system board to the computer.
3 Route the speaker through the cable guide and connect the speaker cable to the its connector.
4 Ax the adhesive of the audio board cable to the system board and connect the audio board cable to its connector.
5 Connect the <engineering input> cable to its connector on the system board.
6 Replace the metal retaining bracket and tighten the screw to secure it to the system board.
7 Connect the display assembly cable to its connector.
8 Place the metal bracket on the display cable connector and tighten the screw.
9 Connect the keyboard and touchpad cables to their connectors on the system board.
10 Connect the antenna cables to the WLAN card.
11 Install the:
adisplay assembly
bbattery
cbase cover
dmicroSD card
12 Follow the procedure in After working inside your computer.
Display assembly
Removing the display assembly
1 Follow the procedure in Before working inside your computer.
CAUTION: The touch LCD Assembly is pre-assembled with the LCD bezel, touch sensor daughter board, touch sensor
cable, display cable, and the camera module and hence cannot be further torn down and must be replaced as an
assembly.
2 Remove the:
amicroSD card
bbase cover
cbattery
3 Then:
a Disconnect the eDP cable [1].
b Disconnect the antenna cables from the WLAN card [2].
c Unroute the WLAN cable from the its routing guide on the fan [3].
d Remove the M1.6xL2 screw securing the power port to the display hinge [4].
e Remove the power port from the system board [5].
Removing and installing components 23
4 Then, do the following to remove the display:
a Remove the M1.6xL2 screw securing the metal bracket covering the display cable connector [1].
b Remove the metal bracket o the computer [2].
c Disconnect the display cable from its connector on the system board [3].
d Flip over the computer [4].
24 Removing and installing components
5 Remove the M2xL4 screws [1] and lift the display assembly o the computer [2].
Removing and installing components 25
Installing the display assembly
1 Place the display assembly to align with the screw holders on the computer.
2 Tighten the M1.6xL2 screws to secure the display assembly to the computer.
3 Turn over the computer.
4 Connect the display cable to the connector.
5 Place the metal bracket over the display connector and tighten the screw to secure the display cable to the computer.
6 Replace the power port on the system board and tighten the screw to secure it to the display hinge.
7 Route the WLAN card cable to its routing guide on the fan and then reconnect the antenna cables to the WLAN card.
8 Connect the eDP cable to its connector on the system board.
9 Install the:
abattery
bbase cover
cmicroSD card
10 Follow the procedure in After working inside your computer
26 Removing and installing components
Hinge Cap
Removing the hinge cap
1 Follow the procedure in Before working inside your computer.
2 Remove the:
amicroSD card
bbase cover
cbattery
ddisplay assembly
3 To remove the hinge cap:
a Press on the left hinge cap to release it from the display assembly [1].
b Press on the right hinge cap to release it from the display assembly [2].
c Remove the hinge cap from the computer [3].
Installing the hinge cap
1 Place the hinge cap on the display assembly.
2 Press the left side of the hinge cap to snap it into place.
3 Press the right side of the hinge cap to snap it into place.
4 Install the:
adisplay assembly
bbattery
cbase cover
dmicroSD card
5 Follow the procedure in After working inside your computer.
Removing and installing components 27
LCD Bezel
Removing the LCD Bezel
1 Follow the procedure in Before working inside your computer.
NOTE: These instructions are applicable only for systems with a non-touch screen display.
2 Remove the:
amicroSD card
bbase cover
cbattery
ddisplay assembly
ehinge cap
3 Remove the M2xL4 screws that secure the bezel to the cover.
4 Using a plastic scribe, gently pry the bezel loose from the cover.
28 Removing and installing components
Installing LCD Bezel
1 Replace the bezel and gently press on the edges to snap the bezel into place.
2 Tighten the screws to secure the LCD bezel to the cover of the computer.
3 Install the:
ahinge cap
bdisplay assembly
cbattery
dbase cover
emicroSD card
4 Follow the procedure in After working inside your computer
LCD Panel
Removing the LCD Panel
1 Follow the procedure in Before working inside your computer.
NOTE: These instructions are applicable only for systems with a non-touch screen display.
2 Remove the:
amicroSD
bbase cover
cbattery
ddisplay assembly
Removing and installing components 29
ehinge cap
fLCD bezel
3 Remove the M1.6xL2 screws securing the LCD panel to the metal bracket and ip over the LCD panel.
4 Lift up the adhesive sticker [1] to expose the foam padding [2]. Then, disconnect the cable from the LCD panel [3] and remove the
connector from the panel [4].
30 Removing and installing components
Installing the LCD Panel
1 Connect the LCD cable to its connector.
2 Replace the foam padding.
3 Ax the adhesive sticker.
4 Place the LCD panel on the cover of the computer.
5 Tighten the screws to secure the LCD panel to the metal bracket.
6 Replace the bezel and gently press on the edges to snap the bezel into place.
7 Tighten the screws to secure the LCD bezel to the cover of the computer.
8 Install the:
aLCD bezel
bhinge cap
cdisplay assembly
dbattery
ebase cover
fmicroSD card
9 Follow the procedure in After working inside your computer
Removing and installing components 31
Camera
Removing the camera
1 Follow the procedure in Before working inside your computer.
NOTE: These instructions are applicable only for systems with a non-touch screen display.
2 Remove the:
amicroSD
bbase cover
cbattery
dLCD bezel
ehinge cap
f LCD bezel
3 Disconnect the camera cable [1] and remove the camera module from the LCD assembly [2].
Installing the camera
1 Place the camera module in its slot on the LCD assembly.
2 Connect the camera cable to its connector on the camera.
3 Replace the bezel and gently press on the edges to snap the bezel into place.
32 Removing and installing components
4 Tighten the screws to secure the LCD bezel to the cover of the computer.
5 Install the:
ahinge cap
bbattery
cbase cover
dmicroSD card
6 Follow the procedure in After working inside your computer
LCD Hinge
Removing the LCD Hinge
1 Follow the procedure in Before working inside your computer.
NOTE: These instructions are applicable only for systems with a non-touch screen display.
2 Remove the:
amicroSD card
bbase cover
cbattery
ddisplay assembly
ehinge cap
fLCD bezel
3 Remove the M1.6xL2 screws that secure the LCD hinge to the metal bracket of the LCD panel and remove the metal bracket o the
computer [2].
Removing and installing components 33
Installing the LCD Hinge
1 Align the LCD hinges to the screw holes on the computer cover.
2 Tighten the screws to secure the hinges to the metal bracket of the LCD assembly.
3 Install the:
aLCD bezel
bhinge cap
cdisplay assembly
dbattery
ebase cover
fmicroSD card
4 Follow the procedure in After working inside your computer
Keyboard
Removing the keyboard
1 Follow the procedure in Before working inside your computer.
2 Remove the:
amicroSD
bbase cover
cbattery
3 Disconnect the keyboard cable from the system board.
4 Hold the sides of the palm rest assembly securely while pushing into the two release holes using a plastic scribe.
34 Removing and installing components
5 Gently pry up the lower edge of the keyboard from the computer.
Removing and installing components 35
CAUTION: As you remove the keyboard from the palmrest, carefully pull out the keyboard cable from the opening on
the palmrest.
6 Remove the keyboard away from the computer.
36 Removing and installing components
Installing the keyboard
1 Align the keyboard trim with the tabs on the computer and press it until it clicks into place .
CAUTION: When reinstalling the keyboard, insert the keyboard cable into the opening on the palmrest rst, before you
slot the keyboard into the top latches.
2 Connect the keyboard cable on the system board.
3 Install the:
abattery
bbase cover
cmicroSD
4 Follow the procedure in After working inside your computer.
Palm rest
Removing the palmrest
1 Follow the procedure in Before working inside your computer
2 Remove the:
amicroSD card
bbase cover
Removing and installing components 37
cbattery
dkeyboard
eheatsink
ffan
gaudio board
hspeakers
itouchpad
jdisplay assembly
ksystem board
NOTE: The component you are left with is the palmrest.
3 Install the following components on the new palmrest.
asystem board
bdisplay assembly
ctouchpad
dspeakers
eaudio board
ffan
gheatsink
hkeyboard
ibattery
jbase cover
kmicroSD card
4 Follow the procedure in After working inside your computer
38 Removing and installing components
Product Specications
This topic details the product specications of the Dell Chromebook 13 (3380).
Table 1. Chromebook 13 (3380) Product Specications
Features Chromebook 13 (3380)
Processor • Intel Celeron Processor 3855U (15W, 2M cache, 1.60 GHz)
• Intel Core i3–6006U Processor (15W.3M cache, 2.0GHz)
Operating System Google Chrome OS
Chipset Intel Skylake (integrated with processor)
Security Browser based security with hardware TPM: Phishing and malware,
SSL certicates, content settings
Dimension Front Height: 0.906 inches (23 mm)
Back Height: 20.8 mm
Width: 13.1 inches (332.9 mm)
Depth: 9.13 inches (231.8mm)
Weight 3.63 lb (1.6448 kg)
Display • 13.3” HD 16:9 (1366 X 768) Anti Glare, non touch
• 13.3” HD 16:9 (1366 x 768) Touch with Corning® Gorilla® Glass
NBT
Graphics Intel HD Graphics
Memory • 4G (LPDDR3) 4 GB 1866 MHz
AC Adapter • 65 W Type-C AC adapter
Battery 4-cell lithium ion (56 Whr Prismatic No ExpressCharge)
Audio Codec MAX98357A AMP
Integrated Microphone Akustica AKU240 digital-output MEMS microphone
Primary Storage 16/32/64 GB eMMC storage
Connectivity • Intel Dual Band Wireless-AC 7265 802.11AC Wi-Fi + BT 4.0 LE
Wireless Card
• Bluetooth: 4.0
Multimedia • Stereo Speakers
• Webcam 720p
• microSD Card Reader
3
Product Specications 39
Features Chromebook 13 (3380)
Ports and Slots • 2 x USB 3.1 Gen 1 with BC1.2
• 1 x USB Type-C (supports USB 3.1 Gen 1, DisplayPort, and
power delivery charging)
• 1 x HDMI 1.4a (Out)
• Universal Audio Jack
• microSD card reader
• Noble Wedge lock slot
Internal MiniCard Slots (M.2)
Warranty • 1 year onsite repair/service
• ProSupport with NBD Onsite
• Premium Phone Support In-Home
• 1-4 years warranty extension options.
Multiple Display Options A connector is available for an external HDMI display up to 1080p
Dock Options N/A
Regulatory and Environmental Compliance Regulatory and product certication for US and EMEA
40 Product Specications
Software
This section provides information about the operating system, commands, and bundled software for the Dell Chromebook 13 (3380).
Topics:
• Operating System
• View system information
• Dell activity light
Operating System
This page contains information about the operating system used by the Dell Chromebook 13 (3380).
Chrome OS
Chromebooks are powered by the Google Chrome operating system, based on Google's popular Chrome browser. It has been developed to
provide a fast, simple, and more secure computing experience for users who spend most of their time online.
Key Benets
• Speed
• Simplicity
• Security
• Updatability
• Synchronization ability
• High power at low cost
• Easy to learn and use
• Documents, calendar, e-mail, contacts, and tasks available online and oine, and all securely backed-up and synchronised in the cloud.
• Access to the Chrome web app store
• The latest Intel Core processors
• Fun games
• Built-in support for popular le types and external devices
• New feature: Android apps from the Google Play Store also work in Chrome now.
For more information about the Chrome OS, please visit the Chrome OS training page
4
Software 41
Veried Boot
Read Only rmware veries the integrity of Read/Write (R/W) rmware. R/W rmware veries the active Linux kernel. During run time,
the kernel veries each block read from disk.
If a verication step fails and there is no backup option, the machine enters recovery mode.
The Developer Mode switch turns o veried boot (at the Kernel stage) to enable users to run Chromium OS (or other OS). The BIOS is
always veried.
42 Software
Disk Partition Map
There are two copies of Chrome OS on disk: an active copy and a backup copy. Each copy consists of a kernel partition and a root le
system. The backup copy is updated automatically in the background. Users only need to reboot. The partition contains encrypted user
data and is also used in the factory for storing test software.
Software 43
44 Software
Developer and Recovery Mode
Table 2. Developer and Recovery Mode
Developer Mode Recovery Mode
• Used to boot without verication.
• Can be turned on via key combination during boot.
• Stateful partition is wiped during transitions.
• Used in the factory to boot test image.
• Allows a user to reinstall the Chrome OS from a USB key or SD
card.
• Recovery mode is entered if veried boot fails.
• A user can force recovery mode via a key combination during
boot
Coreboot + U-boot Custom Firmware
Coreboot (x86 only)
• Memory and chipset initialization
• Open-source, except for MRC binary from Intel.
U-Boot
• Performs veried boot
• Handles recovery and Developer Mode
• Open source code
Normal boot is very fast, as it takes less than 1 second to start loading kernel. Chromebook does not boot other operating systems such as
Windows or OS X.
Software 45
Chromium OS vs ChromeOS
Table 3. Dierence between Chromium OS and ChromeOS
Dierence between Chromium OS and ChromeOS
Chromium OS Chrome OS
• Is an open source project: http://www.chromium.org/
chromium-os
• Runs on regular PCs and Chrome devices
• Is based on Chromium OS
• Only runs on Chrome devices with required hardware features
(TPM, RO rmware, recovery button, developer switch)
• Includes additional licensed features such as the Netix plugin,
video codecs, and fonts
View system information
This page contains all the information about viewing system information for the Dell Chromebook 13 (3380).
Dell Chromebook 13 (3380) does not support Dell BIOS. Hence, there are several ways to check system specications depending on the
information you are searching for. The table below lists some of the most commonly used methods to view system information and
specications.
46 Software
Table 4. View System Information
Commands Action and Purpose Screenshot
Chrome:help View basic OS information.
Chrome:settings View information such as screen resolution
options (Device > Display settings),
touchpad, and other basic hardware
information.
Chrome:system View advanced system information such as
Google Chrome version, BIOS information,
CPU information, memory information,
network status, power supply information,
etc.
Software 47
Commands Action and Purpose Screenshot
Chrome:net-internals View advanced networking information.
Dell activity light
This page contains all the information about the Dell Bright Light software that is used to control Dell Activity Light.
Overview
Dell Activity Light can be used as an indicator for the interaction between school teacher and student, and Dell has designed a software
over this feature. The application will not be factory installed when product RTS, but it can be downloaded and installed via the web-store
through the following link: https://chrome.google.com/webstore/detail/dell-led/klhphccnhmdlnljpdljjhehlmplnmini
48 Software
Raise your Hand/Answer Question/Discussion buttons
Students can either click the on-screen button or press keyboard hot key to on/o the Ask question LED. The on-screen button can be the
Chrome application in the menu or the shortcut icon on the task bar.
Software 49
MultiColor Poll
Students can vote with dierent LED color by either clicking the on-screen button (suggested) or pressing keyboard hot key.
50 Software
Technology and components
This chapter details the technology and components available in the systems.
Topics:
• Keyboard
• Touchpad
• Integrated Microphone
Keyboard
Dell Chromebook 13 (3380) keyboards have a few extra features to help you browse the web eortlessly and eciently. The keyboard
contains a dedicated search key and a new row of web shortcut keys. A standard USB Windows keyboard 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:
5
Technology and components 51
Table 5. Special keys
Special keys
Go to the previous page in browser history (F1)
Go to the next page in browser history (F2)
Reload current page (F3)
Open your page in fullscreen mode (F4)
Switch to your next tab or window (F5)
Decrease screen brightness (F6)
Increase screen brightness (F7)
Mute (F8)
Decrease the volume (F9)
Increase the volume (F10)
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. If you are using a regular keyboard the Windows key in between Ctrl and Alt will work as the
search key. To turn Caps Lock on temporarily, press Alt + Search
Adjust special keys and Caps Lock
Chromebooks come with a special search key to help quickly search the web. To type capital letters, users can make the search key work
like the Caps Lock key. Similarly, you can also adjust the way the Ctrl and Alt keys work on the Settings page.
Change key behavior
1 Sign in to Chromebook
2 Click the status area in the lower-right corner, where the account picture appears.
3 Select Settings.
4 In the Device section, click Keyboard settings.
5 Use the menus to adjust the behavior of the search, Ctrl, and Alt keys.
6 Click OK.
52 Technology and components
Keyboard shortcut keys
Table 6. Shortcut keys
Shortcut keys
Shortcut Function
Esc Stop the loading of your current page
Alt + Up arrow Page up
Alt + Down arrow Page down
Alt + Left arrow (Backspace) Go to previous page in your browsing history
Alt + Right arrow(Shift + Backspace) Go to the next page in your browsing history
Ctrl + Right arrow Move to the end of the next word
Ctrl + Down arrow Move to the start of the previous word
Ctrl + Alt + Up arrow Home
Ctrl + Alt + Down arrow End
Ctrl + Alt + Right arrow Select next word or letter
Ctrl + Alt + Left arrow Select previous word or letter
Ctrl + Alt + ZEnable or disable accessibility features if you're not signed in with a
Google Account. If you're signed in, you can congure the
accessibility feature on the Settings page.
Ctrl + Alt + /Open the list of available keyboard shortcuts
Ctrl + Shift + D Save all open pages in the current window as bookmarks in a new
folder
Ctrl + Shift + G orShift + Enter Go to the previous match for the input in the nd bar
Ctrl + Shift + BToggle the display of the bookmarks bar. Bookmarks appear on the
New Tab page if the bar is hidden.
Ctrl + Shift + I Toggle the display of the Developer Tools panel
Ctrl + Shift + J Toggle the display of the DOM Inspector
Ctrl + Shift + L Locks the screen
Ctrl + Shift + N Open a new window in incognito mode
Ctrl + Shift + BToggle the bookmark bar
Ctrl + Shift + QSign out Google Account
Ctrl + Shift + Q (twice) Sign out Google Account on Chrome OS
Ctrl + Shift + RReload your current page without using cached content
Ctrl + Shift + TReopen the last tab being closed. Google Chrome remembers the
last 10 tabs being closed.
Ctrl + Shift + VPaste content from the clipboard as plain text
Ctrl + Shift + WClose the current window
Ctrl + .Display hidden les in the Files app
Ctrl + ?Go to the Help Center
Ctrl + 0Reset zoom level
Technology and components 53
Shortcut keys
Shortcut Function
Ctrl + 1 through Ctrl + 8Go to the tab at the specied position in the window
Ctrl + 9Go to the last tab in the window
Ctrl + ASelect everything on the page
Ctrl + CCopy selected content to the clipboard
Ctrl + DSave your current webpage as a bookmark
Ctrl + FSearch your current webpage
Ctrl + G or Enter Go to the next match for the input in the nd bar
Ctrl + HOpen the History page
Ctrl + JOpen the Downloads page
Ctrl + K or Ctrl + EPerform a search. Type a search term after the question mark in the
address bar and press Enter.
Ctrl + L or Alt + D Select the content in the address bar
Ctrl + NOpen a new window
Ctrl + OOpen a le in the browser
Ctrl + PPrint your current page
Ctrl + R Reload your current page
Ctrl + S Save your current page
Ctrl + TOpen a new tab
Ctrl + UView page source
Ctrl + VPaste content from the clipboard
Ctrl + WClose the current tab
Ctrl + XCut
Ctrl + ZUndo the last action
Ctrl + Backspace Delete the previous word
Ctrl + Tab Switch to next tab
Ctrl + Enter Add www. and .com to your input in the address bar and open the
resulting URL
Ctrl + Shift + Tab Go to the previous tab in the window
Ctrl + Shift + Refresh Rotate screen 90 degrees
Ctrl + Shift + )Reset screen scale
Ctrl + Shift + + Increase screen scale
Ctrl + Shift + -Decrease screen scale
Ctrl + Shift + Refresh Rotate screen 90 degrees
Ctrl + +Zoom in on the page
Ctrl + -Zoom out on the page
Alt + click a link Open the link you clicked in a new background tab
Alt + 1 through Alt + 8Go to the window at the specied position
Alt + 9 Go to the last window open
54 Technology and components
Shortcut keys
Shortcut Function
Alt + E or Alt + F Open the Chrome menu on the browser toolbar
Alt + Backspace Delete the next letter (forward delete)
Alt + Tab Go to the next window that have opened
Alt + Shift + Tab Go to the previous window that have opened
Alt + Shift + MOpen the Files app
Alt + Shift + BPlace focus on the bookmarks bar. Use the actions listed for Shift
+Alt+T to move the focus.
Shift + Alt + SOpens the status area in the bottom-right corner of the screen
Shift + Alt + LPlace focus on the launcher
• Press Tab or the right arrow to focus on the next item in the
toolbar
• Press Shift+Tab or the left arrow to focus on the previous item
in the toolbar
• Press Space or Enter to activate buttons, including page actions
and browser actions
• Press Shift + Volume increase to open the context menu for the
button (if available)
• Press Esc to return focus to the page
Shift + Search + Volume Up Open right-click menus for focused items
Shift + Esc Open the Task Manager
To see more shortcuts, simply press Ctrl+Alt+? To open the keyboard viewer on your screen.
Touchpad
This page contains information for Dell Chromebook 13 (3380) touchpad gestures.
The following table lists some gestures and actions supported by the Chromebook touchpad:
Table 7. Touchpad gestures
Touchpad gestures
Gestures Explanation
Simply move your nger across the touchpad.
Technology and components 55
Touchpad gestures
Gestures Explanation
Move the Cursor
Single Click
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.
Right Click
Click the touchpad with two ngers.
Scroll
Place two ngers 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 ngers 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 ngers to quickly move between tabs.
Swipe Quickly move two ngers left or right to go backward or forward on web pages or while using apps.
Drag and Drop
Click the item you want to move with one nger. With a second nger, move the item. Release both ngers to
drop the item at its new location.
Integrated Microphone
This page contains all the information about the Dell Chromebook 13 (3380) integrated microphone.
Akustica AKU240 is an HD Voice quality, top port, digital output MEMS microphone in a small 4.0 x 3.0 x 1.0 mm package. The robust digital
output stream from the AKU240 is virtually immune to all forms of Radio Frequency Interference (RFI) and Electromagnetic Interference
(EMI) allowing the microphone to be integrated anywhere on the platform regardless of proximity to displays, the Wi-Fi antennae, or other
sources of interference that would degrade the signal of conventional analog microphones. For the device manufacturer, this translates to a
higher degree of design exibility by providing a consistent SNR level regardless of environment, resulting in shorter design cycles.
56 Technology and components
The output of the microphone is pulse density modulated (PDM), a single-bit digital output stream designed to enable the multiplexing of
stereo microphone data onto a single wire. With a user selectable Left/Right channel option, the AKU240 is ideal for use in multiple
microphone applications.
Key features
• Digital MEMS Microphone with PDM (pulse density modulation) output
• Excellent acoustic performance with 63 dB SNR
• Compatible with Microsoft Windows 8 and Intel Ultrabook Requirements for Digital Microphones
• Tightly controlled sensitivity of -26 dBFS +/- 2 dB
• Robust digital-output immune to RF/EM interference
• Matched microphones in frequency and phase response for array applications
• Output supports dual-microphone, single-wire multiplexing •Industry standard microphone interface compatible with multiple codecs.
• Low current power-down mode
• Lead-free surface-mountable and RoHS2 compliant
• Halogen-free in accordance with IEC61249-2-21
• Thin prole, SMT packaging
• Industry-standard package of 4.00 x 3.00 x 1.00 mm
Typical applications
• Ultrabooks
• Mobile phones
• Media tablets
• eReaders
• Microphone arrays
• Webcams and camera modules
Technology and components 57
Diagnostics and Troubleshooting
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,
rst 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 bt on or bt o 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 will 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.
3 Select your Bluetooth status in the menu that appears.
4 If Bluetooth is disconnected, click the disconnected icon bt o 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 conrm 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 rst 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.
Basic troubleshooting
This page contains all the information for Dell Chromebook 13 (3380) 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.
6
58 Diagnostics and Troubleshooting
Power issues
Table 8. Power Issue
Power issues
Issue Possible solutions
Chromebook does not Power On
If the Chromebook does 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 gure 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
rst time, the battery is still in shipping mode.
To resolve this issue, turn o 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 by pressing Refresh + Power.
4 Use a dierent AC adapter with the same power voltage.
5 Remove the AC adapter and turn on with the battery power
only.
6 If the above steps did not resolve the issue, perform a hard
reset.
NOTE: You can perform a hard reset by pressing Refresh +
Power.
Display issue
Table 9. 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 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 o, then turn it back on again.
3 Reset or Recover the Chromebook.
Diagnostics and Troubleshooting 59
Audio, screen and camera issues
Table 10. 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 very low when
attempting to listen to audio:
1 Make sure 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 les 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 les stored locally on the Chromebook.
3 Try rebooting the Chromebook.
4 If audio still does not respond, try Reset or Recover the
Chromebook
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 Reset or Recover the
Chromebook.
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 dierent apps that use the camera. Try a Google+
Hangout or the onboard camera app
3 Try rebooting the Chromebook
4 If the camera issues persist, try Reset or Recover the
Chromebook.
60 Diagnostics and Troubleshooting
Bluetooth issue
Table 11. 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're trying to pair
is supported by the Chromebook. Check with the device
vendor for compatibility. Chrome does not support driver
installation, so specialized devices may not work.
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 issues with Bluetooth, try Reset or
Recover the Chromebook.
Touchpad / Hotkeys Issues
Table 12. Touchpad / Hotkeys Issues
Touchpad / Hotkeys issues
Issue Possible solutions
Touchpad not responding
If the touchpad 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 ngers across the touchpad for a few seconds.
3 Restart the Chrome OS by holding down the power button
until the device turns o, and then turn it back on again.
4 If the cursor still does not move when using the touchpad, try
logging in from the Guest account using the tab key to
navigate.
5 If users experience touchpad 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 Reset or Recover the
Chromebook.
Top row of keys (Hotkeys) not responding
If a hotkey (like the volume or brightness keys) is not responding,
try the following troubleshooting steps, making sure to test the keys
after each one:
1 If the aected 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 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.
3 Restart the Chrome OS by holding down the power button
until the device turns o, and then turn it back on again.
4 Try using the keys in the Guest account.
Diagnostics and Troubleshooting 61
Touchpad / Hotkeys issues
Issue Possible solutions
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 Reset or Recover the
Chromebook.
Chrome OS issue
Table 13. 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 wasn’t 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 theGoogle
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 o 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 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 dierent PC.
3 Open an internet browser and navigate to https://
www.google.com/accounts/recovery/.
62 Diagnostics and Troubleshooting
Chrome OS issues
4 Select I don’t know my password, and then enter the e-mail
address that you use to sign in to Google.
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.
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:
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 stu
Create Recovery USB Stick chrome://imageburner/ Google's version of DBAR/DBRM
Chrome Flags chrome://ags Experimental features beyond the scope of
what Dell supports
Memory Troubleshooting chrome://memory View running processes and memory
utilization
Module Load chrome://conicts Shows conicts 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
Diagnostics and Troubleshooting 63
Purpose Browser Shortcut Explanation
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:
Table 15. Helpful chrome commands
Chrome Commands Purpose Screenshot
chrome://ags 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.
chrome://dns This displays the list of hostnames for which
the browser will prefetch the DNS records.
64 Diagnostics and Troubleshooting
Chrome Commands Purpose Screenshot
chrome://downloads This is also available from the Menu >
Downloads. Shortcut key is Ctrl+J.
chrome://extensions This is also available from the Menu > Tools
> Extensions.
chrome://bookmarks This is also available from the Menu >
Bookmarks > Bookmark Manager. Short cut
key is Ctrl+Shift+O.
Diagnostics and Troubleshooting 65
Chrome Commands Purpose Screenshot
chrome://history This is also available from the Menu >
History. Short cut key is Ctrl+H.
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.
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/.
66 Diagnostics and Troubleshooting
Chrome Commands Purpose Screenshot
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
les.
chrome://sessions This displays the number of sessions and
magic list that are currently running.
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.
Diagnostics and Troubleshooting 67
Chrome Commands Purpose Screenshot
chrome://sync-internals This gives information about the Chrome
sync feature, including the Sync URL used
by Google, and sync statistics.
CROSH
This topic covers the information 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
troubleshooting 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 dierently 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.
68 Diagnostics and Troubleshooting
CROSH commands
The table below lists the available commands in Chrome Shell (CROSH).
Table 16. Help commands
Command Purpose
exit Exits the CROSH Shell.
help Displays this help.
help_advanced Displays the help for more advanced commands, used for
debugging.
ping [-c count] [-i interval] [-n] [-s packetsize] [-W waittime] — Sends
ICMP ECHO_REQUEST packets to a network host. If is "gw", then
the next hop gateway for the default route is used. It works just 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 17. 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
species the capability of a pairing agent the console provides; see
the Bluetooth Core specication 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.
_debug [<tag_expr>] [--help] [--list_valid_tags] [--reset] Adds and removes imam 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 Congures the modem for the specied carrier.
network_diag[--date] [--link] [--show-macs] [--wi] [--help] [--wi-
mon] <host>
Performs a suite of network diagnostics and saves a copy of the
output to your download directory
network_logging <wi|cellular|ethernet> Enables a predened set of tags useful for debugging the specied
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
Diagnostics and Troubleshooting 69
Command Purpose
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.
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 specied by
<network-id>. If <network-id> is not specied, 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 conguration. Can be used to play/record audio
samples and enable beam forming on Pixel. sound beamforming
<on|o > will enable/disable the feature. sound record [duration]
will start recording. sound play <lename> plays the recorded audio
samples
storage_status Reads storage device SMART health status, vendor attributes, and
error logs.
storage_test_1 Performs a short oine SMART test.
storage_test_2 Performs an extensive readability test.
syslog <message> Logs a message to system log.
tpcontrol{status | taptoclick [on|o] sensitivity [1-5] | set
<property>< value>} tpcontrol {syntp [on|o]}
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|o > Turns autorepeat on/o. If a keycode is specied, it aects only
that key. If not specied, it aects global behavior.
70 Diagnostics and Troubleshooting
Commonly used CROSH command
This page contains information about the most commonly used CROSH commands to diagnose the Dell Chromebook 13 (3380).
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 eMMC storage device.
Check battery charging status
The Chrome Shell (CROSH) includes a simple battery health diagnostic test. This is to conrm 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.
5 Type battery_test 1 into CROSH, and then press Enter.
6 Check the result to conrm 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.
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 Battery is Unknown, the battery might need to be replaced.
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.
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.
Diagnostics and Troubleshooting 71
Follow the instruction to gather the information about the network and diagnose the network errors.
1 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.
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) le in the Files app.
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 the Dell Chromebook 13 (3380).
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 prole.
NOTE: All data stored on your Chromebook such as downloaded les, 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 aect 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.
2 Click Settings as highlighted from the screenshot below.
3 Click Show advanced settings to expand the menu.
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 rst 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 will be set as the owner account.
Recovering Chromebook
This page contains information about recovering the Dell Chromebook 13 (3380).
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 les, 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 aected by the recovery process. After the recovery process is complete, you will be guided
through the initial setup again.
Prerequisites:
72 Diagnostics and Troubleshooting
Before starting this process, you will need the following:
• A Chrome device, Windows, Mac, or Linux computer with administrative rights.
• A 4 GB or larger USB ash 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 rst 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 verication is turned o message, refer to Chrome OS verication is turned o section below.
Step 2: Create the recovery USB ash drive or SD card
Insert a USB ash drive or SD card into your computer and follow the instructions below:
Table 18. USB ash drive or SD card
Operating System Instructions
Chrome Device Instructions
Create a recovery ash 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 ash 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 Run the tool and follow the instructions that appear on your
screen.
3 After you recover your Chromebook, you must format your
USB ash drive or SD card using the Recovery Tool. If you do
not format your USB ash drive or SD card, you will not be
able to use all the storage space on your external device.
Additionally, your USB ash drive or SD card may not be
recognizable by Windows.
Mac Instructions
Create a recovery ash drive by using the Recovery Tool. The tool
may not be available in all languages.
1 Click this link to download the Recovery Tool.
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 ash 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
Diagnostics and Troubleshooting 73
Operating System Instructions
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 ash 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 ash 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 ash drive or SD card.
6 Remove the USB ash 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 verication is turned o" 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 verication is turned o" 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.
NOTE: Dell does not support the use of the Developer Mode or non-standard OS versions.
Troubleshooting Tips
Table 19. 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:
1Conrm that you successfully completed all instructions
exactly as specied in Step 2: Create the recovery USB ash
drive or SD card above.
2 Try using a dierent USB stick or SD card.
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 specied 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.
74 Diagnostics and Troubleshooting
Question Solution
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.
Diagnostics and Troubleshooting 75
Contacting Dell
NOTE: If you do not have an active Internet connection, you can nd contact information on your purchase invoice, packing slip,
bill, or Dell product catalog.
Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services
may not be available in your area. To contact Dell for sales, technical support, or customer service issues:
1 Go to Dell.com/support.
2 Select your support category.
3 Verify your country or region in the Choose a Country/Region drop-down list at the bottom of the page.
4 Select the appropriate service or support link based on your need.
7
76 Contacting Dell