HP Chromebook 14a Series Manual

Maintenance and Service Guide
HP Chromebook 14a
IMPORTANT! This document is intended for HP authorized service
providers only.

© Copyright 2020 HP Development Company,
L.P.
Bluetooth is a trademark owned by its
proprietor and used by HP Inc. under license.
Intel is a trademark of Intel Corporation or its
subsidiaries in the U.S. and/or other countries.
Chromebook, Google, and the Google Logo are
registered trademarks of Google LLC. Intel,
Celeron, and Pentium are trademarks of Intel
Corporation or its subsidiaries in the U.S.
and/or other countries. SDHC, SDXC, and
microSD are trademarks or registered
trademarks of SD-3C LLC.
The information contained herein is subject to
change without notice. The only warranties for
HP products and services are set forth in the
express warranty statements accompanying
such products and services. Nothing herein
should be construed as constituting an
additional warranty. HP shall not be liable for
technical or editorial errors or omissions
contained herein.
First Edition: February 2020
Document Part Number: L93843-001
Product notice
This guide describes features that are common
to most models. Some features may not be
available on your computer.
To access the latest user guides, go to
http://www.hp.com/support, and follow the
instructions to nd your product. Then select
User Guides.
Software terms
By installing, copying, downloading, or
otherwise using any software product
preinstalled on this computer, you agree to be
bound by the terms of the HP End User License
Agreement (EULA). If you do not accept these
license terms, your sole remedy is to return the
entire unused product (hardware and software)
within 14 days for a full refund subject to the
refund policy of your seller.
For any further information or to request a full
refund of the price of the computer, please
contact your seller.

Safety warning notice
WARNING! To reduce the possibility of heat-related injuries or of overheating the device, do not place the
device directly on your lap or obstruct the device air vents. Use the device only on a hard, at surface. Do not
allow another hard surface, such as an adjoining optional printer, or a soft surface, such as pillows or rugs or
clothing, to block airow. Also, do not allow the AC adapter to contact the skin or a soft surface, such as
pillows or rugs or clothing, during operation. The device and the AC adapter comply with the user-accessible
surface temperature limits dened by applicable safety standards.
iii

iv Safety warning notice

Table of contents
1 Product description ....................................................................................................................................... 1
2 Getting to know your computer ...................................................................................................................... 3
Right side ............................................................................................................................................................... 3
Left side ................................................................................................................................................................. 4
Display .................................................................................................................................................................... 5
Keyboard area ........................................................................................................................................................ 6
Touchpad ............................................................................................................................................. 6
Speakers .............................................................................................................................................. 6
Special keys ......................................................................................................................................... 7
Action keys ........................................................................................................................................... 8
Labels ..................................................................................................................................................................... 9
3 Illustrated parts catalog .............................................................................................................................. 10
Computer major components .............................................................................................................................. 10
Cables ................................................................................................................................................................... 12
Display assembly subcomponents ...................................................................................................................... 13
Miscellaneous parts ............................................................................................................................................. 14
4 Removal and replacement procedures preliminary requirements .................................................................... 15
Tools required ...................................................................................................................................................... 15
Service considerations ......................................................................................................................................... 15
Plastic parts ....................................................................................................................................... 15
Cables and connectors ...................................................................................................................... 15
Drive handling ................................................................................................................................... 16
Workstation guidelines ..................................................................................................................... 16
Electrostatic discharge information .................................................................................................................... 16
Generating static electricity .............................................................................................................. 17
Preventing electrostatic damage to equipment ............................................................................... 17
Personal grounding methods and equipment .................................................................................. 18
Grounding the work area ................................................................................................................... 18
Recommended materials and equipment ........................................................................................ 18
Packaging and transporting guidelines .............................................................................................................. 19
5 Removal and replacement procedures for authorized service provider parts .................................................... 20
Component replacement procedures .................................................................................................................. 20
v

Preparation for disassembly ............................................................................................................. 20
Bottom cover ..................................................................................................................................... 21
Battery ............................................................................................................................................... 23
WLAN module .................................................................................................................................... 24
Speaker .............................................................................................................................................. 26
Touchpad ........................................................................................................................................... 27
USB board .......................................................................................................................................... 29
System board .................................................................................................................................... 30
Power connector (DC in) cable .......................................................................................................... 33
Display assembly ............................................................................................................................... 34
Keyboard with top cover ................................................................................................................... 42
6 Specications .............................................................................................................................................. 43
Computer specications ...................................................................................................................................... 43
35.6 cm (14.0 in) display specications .............................................................................................................. 44
7 Power cord set requirements ........................................................................................................................ 45
Requirements for all countries ............................................................................................................................ 45
Requirements for specic countries and regions ................................................................................................ 46
8 Recycling .................................................................................................................................................... 48
Index ............................................................................................................................................................. 49
vi

1 Product description
Table 1-1 Product components and their descriptions
Category Description
Product Name HP Chromebook™ 14a
Model numbers: 14a-na0000 ~ 14a-na0999
CTO Model: 14at-na000
Processor Intel® Pentium® Silver Processor N5030 (1.1 GHz, turbo up to 3.1 GHz, 2400 MHz FSB, 4 MB L2 cache,
quad core, 6 W; Intel UHD 605 Graphics)
Intel Pentium Silver Processor N5000 (1.1 GHz, turbo up to 2.7 GHz, 2400 MHz FSB, 4 MB L2 cache, quad
core, 6 W; Intel UHD 605 Graphics)
Intel Celeron® N4020 Processor (1.1 GHz, turbo up to 2.8 GHz, 2400 MHz FSB, 4 MB L2 cache, dual core, 6
W; Intel UHD 600 Graphics)
Intel Celeron N4000 Processor (1.1 GHz, turbo up to 2.6 GHz, 2400 MHz FSB, 4 MB L2 cache, dual core, 6
W; Intel UHD 600 Graphics)
Graphics Internal graphics
Intel UHD 605 Graphics (Intel Pentium processors)
Intel UHD 600 Graphics (Intel Celeron processors)
Supports HD decode, DX12, and HDMI
Display panel 35.6 cm (14.0 in), WLED, slim (3.0 mm), narrow bezel, 45% NTSC
High-denition (HD) (1366 × 768), antiglare, SVA, eDP 1.2, 220 nits
HD, BrightView, SVA, eDP, 220 nits, Touch-on Panel (TOP)
Full high-denition (FHD) (1920 × 1080), antiglare, UWVA, eDP 1.2, 250 nits
FHD, antiglare, UWVA, eDP, 250 nits, Touch-on Panel (TOP)
Memory Not customer accessible or upgradeable
LPDDR4-2400 dual channel support (LPDDR4-4266 bridge to LPDDR4-3733 and LPDDR4-3733
downgrade to LPDDR4-2400)
Supports up to 8 GB maximum system memory in the following congurations:
●8 GB
●4 GB
Storage eMMC v5.0 congurations
128 GB
64 GB
32 GB
Audio Audio brand: B&O Audio
Dual speakers
1

Table 1-1 Product components and their descriptions (continued)
Category Description
Video HP Wide Vision HD Camera
720p by 30 frames per second
Dual-array digital microphone with appropriate software: echo cancellation, noise suppression, Google™
Assistant Support
Wireless networking Integrated wireless option with dual antennas (M.2/PCIe)
Realtek RTL8822CE 802.11ac 2 × 2 Wi-Fi + Bluetooth® 5.0 (MU-MIMO supported)
Ports Audio-out (headphone)/Audio-in (microphone) combo jack
USB 3.2 Type A port (right side)
(2) USB 3.2 Type C ports (right and left side)
Support power delivery, data transfer, DisplayPort 1.2 out up to 4096 × 2304 (60 Hz) and HDMI 1.4 out
through adapter
Media card reader Supports microSD™, SDHC™, SDXC™
Push-push insertion and removal
Keyboard/pointing
devices
Google Keyboard
Full size, island style
Full size, island style, textured, backlit
Touchpad requirements
Multitouch gestures enabled
Taps enabled as default
Power requirements Battery
2 cell, 47 Whr long-life battery
Supports battery fast charge (50% in 45 minutes, 90% in 90 minutes)
AC adapter
45 W, nPFC, USB Type-C, straight
Power cord
1 m. conventional, C5
Security H1 Secure Microcontroller
Operating system Preinstalled
Google Chrome 64
Serviceability User replaceable part
AC adapter
2 Chapter 1 Product description

2 Getting to know your computer
Your computer features top-rated components. This chapter provides details about your components, where
they are located, and how they work.
Right side
Table 2-1 Right-side components and their descriptions
Component Description
(1) USB Type-C power connector and port Connects an AC adapter that has a USB Type-C connector,
supplying power to the computer and, if needed, charging the
computer battery.
– and –
Connects a USB device, provides data transfer, and (for select
products) charges small devices when the computer is on or in
Sleep mode.
– and –
Connects a display device that has a USB Type-C connector,
providing DisplayPort™ output.
NOTE: Cables, adapters, or both (purchased separately) may
be required.
(2) AC adapter and battery light ●White: The AC adapter is connected and the battery is fully
charged.
●Amber: The AC adapter is connected and the battery is
charging.
●O: The battery is not charging.
(3) USB SuperSpeed port with Sleep and Charge Connects a USB device, provides high-speed data transfer, and
charges small devices.
Right side 3

Left side
Table 2-2 Left-side components and their descriptions
Component Description
(1) Audio-out (headphone)/Audio-in
(microphone) combo jack
Connects optional powered stereo speakers, headphones, earbuds, a headset,
or a television audio cable. Also connects an optional headset microphone.
This jack does not support optional standalone microphones.
WARNING! To reduce the risk of personal injury, adjust the volume before
putting on headphones, earbuds, or a headset. For additional safety
information, see the Regulatory, Safety, and Environmental Notices.
NOTE: When a device is connected to the jack, the computer speakers are
disabled.
(2) AC adapter and battery light ●White: The AC adapter is connected and the battery is fully charged.
●Amber: The AC adapter is connected and the battery is charging.
●O: The battery is not charging.
(3) USB Type-C power connector and
port
Connects an AC adapter that has a USB Type-C connector, supplying power to
the computer and, if needed, charging the computer battery.
– and –
Connects a USB device, provides data transfer, and (for select products)
charges small devices when the computer is on or in Sleep mode.
– and –
Connects a display device that has a USB Type-C connector, providing
DisplayPort output.
NOTE: Cables, adapters, or both (purchased separately) may be required.
(4) microSD™ memory card reader Reads optional memory cards that enable you to store, manage, share, or
access information.
To insert a card:
1. Hold the card label-side up, with connectors facing the computer.
2. Insert the card into the memory card reader, and then press in on the
card until it is rmly seated.
To remove a card:
▲Press in on the card, and then remove it from the memory card reader.
4 Chapter 2 Getting to know your computer

Display
Table 2-3 Display components and their descriptions
Component Description
(1) WLAN antennas* Send and receive wireless signals to communicate with wireless local
area networks (WLANs).
(2) Internal microphones Record sound.
(3) Camera Allows you to video chat, record video, and record still images.
NOTE: Camera functions vary depending on the camera hardware
and software installed on your product.
(4) Camera light On: The camera is in use.
*The antennas are not visible from the outside of the computer. For optimal transmission, keep the areas immediately around the
antennas free from obstructions.
For wireless regulatory notices, see the section of the Regulatory, Safety, and Environmental Notices that applies to your country or
region.
Display 5

Keyboard area
Touchpad
Table 2-4 Touchpad and its description
Component Description
Touchpad zone Reads your nger gestures to move the pointer or activate items on the
screen.
Speakers
Table 2-5 Speakers and their description
Component Description
Speakers (2) Produce sound.
6 Chapter 2 Getting to know your computer

Special keys
Table 2-6 Special keys and their descriptions
Component Description
(1) esc key Activates certain computer functions when pressed in
combination with other keys, such as Tab or Shift.
(2) Action keys Execute frequently used system functions. See Action keys
on page 8.
(3) Power button ●When the computer is o, press the button to turn on the
computer.
●When the computer is on, press the button briey to
initiate Sleep.
●When the computer is in the Sleep state, press the button
briey to exit Sleep (select products only).
IMPORTANT: Pressing and holding down the power button
results in the loss of unsaved information.
If the computer has stopped responding and shutdown
procedures are ineective, press and hold the power button
down for at least 10 seconds to turn o the computer.
Keyboard area 7

Action keys
An action key performs the function indicated by the icon on the key. To determine which keys are on your
product, see Special keys on page 7.
▲To use an action key, press and hold the key.
For more information on action keys and keyboard shortcuts, go to https://support.google.com/chromebook/
answer/183101. Select your language at the bottom of the page.
Table 2-7 Action keys and their descriptions
Icon Key Description
Back Displays the previous page in your browser history.
Forward Displays the next page in your browser history.
Reload Reloads your current page.
Full screen Opens your page in full-screen mode.
Display apps Displays open apps.
NOTE: Pressing this button in conjunction with ctrl takes a screenshot.
Brightness down Decreases the screen brightness incrementally as long as you hold down
the key.
Press simultaneously with ctrl to decrease the keyboard backlight (select
products only) incrementally as long as you hold down the key.
Brightness up Increases the screen brightness incrementally as long as you hold down
the key.
Press simultaneously with ctrl to increase the keyboard backlight (select
products only) incrementally as long as you hold down the key.
Mute Mutes speaker sound.
Volume down Decreases speaker volume incrementally as long as you hold down the
key.
Volume up Increases speaker volume incrementally as long as you hold down the key.
8 Chapter 2 Getting to know your computer

Labels
The labels axed to the computer provide information you may need when you troubleshoot system
problems or travel internationally with the computer. Labels may be in paper form or imprinted on the
product.
IMPORTANT: Check the following locations for the labels described in this section: the bottom of the
computer, inside the battery bay, under the service door, on the back of the display, or on the bottom of a
tablet kickstand.
●Service label—Provides important information to identify your computer. When contacting support, you
may be asked for the serial number, the product number, or the model number. Locate this information
before you contact support.
Table 2-8 Service label components
Component
(1) HP product name
(2) Model number
(3) Product ID
(4) Serial number
(5) Warranty period
●Regulatory label(s)—Provide(s) regulatory information about the computer.
●Wireless certication label(s)—Provide(s) information about optional wireless devices and the approval
markings for the countries or regions in which the devices have been approved for use.
Labels 9

3 Illustrated parts catalog
Computer major components
NOTE: HP continually improves and changes product parts. For complete and current information about
supported parts for your computer, go to http://partsurfer.hp.com, select your country or region, and then
follow the on-screen instructions.
NOTE: Details about your computer, including model, serial number, product key, and length of warranty,
are on the service tag at the bottom of your computer. See Labels on page 9 for details.
10 Chapter 3 Illustrated parts catalog

Table 3-1 Computer major components and their descriptions
Item Component Spare part number
(1) Display assembly
NOTE: Display assemblies are oered as spare parts only at a subcomponent level.
(2) Keyboard with top cover
For a detailed list of country codes, see Keyboard with top cover on page 42.
Snow white; no backlight L91515-xx1
Snow white; backlit L91516-xx1
Ash silver; no backlight L91511-xx1
Ash silver; backlit L91512-xx1
Natural silver; no backlight L91513-xx1
Natural silver; backlit L91514-xx1
(3) Touchpad
The touchpad cable is available as spare part number L91527-001.
L91526-001
(4) USB board L91522-001
(5) Speaker assembly L91528-001
(6) System board (includes integrated processor and thermal material)
NOTE: The system board thermal pad is available as spare part number L76600-001.
Intel Pentium Silver N5030 processor, 8 GB system memory, and 128 GB eMMC memory L91521-001
Intel Pentium Silver N5030 processor, 4 GB system memory, and 64 GB eMMC memory L91520-001
Intel Pentium Silver N5000 processor, 8 GB system memory, and 128 GB eMMC memory M03106-001
Intel Pentium Silver N5000 processor, 8 GB system memory, and 128 GB eMMC memory,
models with a backlit keyboard
M03111-001
Intel Pentium Silver N5000 processor, 4 GB system memory, and 64 GB eMMC memory M00111-001
Intel Pentium Silver N5000 processor, 4 GB system memory, and 64 GB eMMC memory,
models with a backlit keyboard
M03109-001
Intel Celeron N4020 processor, 8 GB system memory, and 128 GB eMMC memory L91519-001
Intel Celeron N4020 processor, 4 GB system memory, and 64 GB eMMC memory L91518-001
Intel Celeron N4020 processor, 4 GB system memory, and 32 GB eMMC memory L91517-001
Intel Celeron N4000 processor, 8 GB system memory, and 128 GB eMMC memory M03105-001
Intel Celeron N4000 processor, 8 GB system memory, and 128 GB eMMC memory, models
with a backlit keyboard
M03110-001
Intel Celeron N4000 processor, 4 GB system memory, and 64 GB eMMC memory M00110-001
Intel Celeron N4000 processor, 4 GB system memory, and 64 GB eMMC memory, models
with a backlit keyboard
M03108-001
Intel Celeron N4000 processor, 4 GB system memory, and 32 GB eMMC memory M00109-001
Intel Celeron N4000 processor, 4 GB system memory, and 32 GB eMMC memory, models
with a backlit keyboard
M03107-001
Computer major components 11

Table 3-1 Computer major components and their descriptions (continued)
Item Component Spare part number
(7) Power connector cable L99191-001
(8) Thermal pad L76600-001
(9) WLAN module (Realtek RTL8822CE 802.11ac 2 × 2 Wi-Fi + Bluetooth 5.0) L44796-005
(10) Battery (2 cell, 47 Whr) L75783-005
(11) Bottom cover L91523-001
(12) Rubber feet L91524-001
Screw covers (not illustrated) L91525-001
Cables
Table 3-2 Cables and their descriptions
Item Component Spare part number
(1) Touchpad cable L91527-001
(2) Power connector cable (DC in) L99191-001
(3) USB high speed cable L73309-001
(4) USB low speed cable L73310-001
12 Chapter 3 Illustrated parts catalog

Display assembly subcomponents
Table 3-3 Display components and their descriptions
Item Component Spare part number
(1) Display bezel
Ash grey L91534-001
Mineral silver L91535-001
(2) Display panel (includes display tape and panel adhesive)
FHD, antiglare L91591-001
FHD, antiglare, Touch-on Panel (TOP) L91592-001
HD, antiglare L91593-001
HD, BrightView, Touch-on Panel (TOP) L91594-001
(3) Display hinges (left and right) (include display tape) L91537-001
(4) Display panel cable (includes display tape)
For use with touch displays L91539-001
For use with nontouch displays L91538-001
(5) Webcam/microphone module L91540-001
(6) Wireless antennas (dual) (includes display tape) L91533-001
(7) Webcam cable (includes display tape) L91541-001
Display assembly subcomponents 13

Table 3-3 Display components and their descriptions (continued)
Item Component Spare part number
(8) Display back cover
Mineral silver L91530-001
Forest teal L91529-001
Ceramic white L91531-001
Miscellaneous parts
Table 3-4 Miscellaneous parts and their descriptions
Component Spare part number
AC adapter (USB Type-C, 45 W, nPFC, 3 pin, 1.8 m) L43407-001
Screw Kit L91542-001
Screw protective tape L91525-001
Power adapter for use in Japan (C5) 226768-001
Power cord (C5, 1.0 m)
For use in Australia L19358-001
For use in Denmark L19360-001
For use in Europe L19361-001
For use in India L19363-001
For use in Japan L19365-001
For use in North America L19367-001
For use in South Korea L19366-001
For use in Taiwan L19372-001
For use in the United Kingdom L19373-001
14 Chapter 3 Illustrated parts catalog