HP Chromebook Pro c640 G2 Manual

Maintenance and Service Guide
SUMMARY
This guide provides information about spare parts, removal and replacement of parts, security, backing up, and more.

© Copyright 2021 HP Development Company,
L.P.
Bluetooth is a trademark owned by its
proprietor and used by HP Inc. under license.
Chrome, Chrome OS, Chromebook, Google,
Google Assistant, and Google Drive are
trademarks of Google LLC. Intel, Celeron, Core,
Iris, Pentium, and vPro 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. Microsoft and
Windows are either registered trademarks or
trademarks of Microsoft Corporation in the
United States and/or other countries. USB
Type-C and USB-C are registered trademarks of
USB Implementers Forum.
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: June 2021
Document Part Number: M73765-001
Product notice
This guide describes features that are common
to most models. Some features may not be
available on your computer.
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
Reduce the possibility of heat-related injuries or of overheating the computer by following the practices
described.
WARNING! To reduce the possibility of heat-related injuries or of overheating the computer, do not place
the computer directly on your lap or obstruct the computer air vents. Use the computer 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 come into contact with the
skin or a soft surface, such as pillows or rugs or clothing, during operation. The computer 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 Components .................................................................................................................................................. 4
Right ....................................................................................................................................................................... 4
Left ......................................................................................................................................................................... 5
Display .................................................................................................................................................................... 6
Keyboard area ........................................................................................................................................................ 7
Touchpad ............................................................................................................................................. 7
Speakers and ngerprint reader ......................................................................................................... 8
Special keys ......................................................................................................................................... 8
Bottom ................................................................................................................................................................... 9
Labels ................................................................................................................................................................... 10
3 Illustrated parts catalog .............................................................................................................................. 12
Computer major components .............................................................................................................................. 12
Display assembly subcomponents ...................................................................................................................... 14
Miscellaneous parts ............................................................................................................................................. 16
4 Removal and replacement procedures preliminary requirements .................................................................... 18
Tools required ...................................................................................................................................................... 18
Service considerations ......................................................................................................................................... 18
Plastic parts ....................................................................................................................................... 18
Cables and connectors ...................................................................................................................... 18
Drive handling ................................................................................................................................... 18
Electrostatic discharge information .................................................................................................................... 19
Generating static electricity .............................................................................................................. 19
Preventing electrostatic damage to equipment ............................................................................... 20
Personal grounding methods and equipment .................................................................................. 20
Grounding the work area ................................................................................................................... 21
Recommended materials and equipment ........................................................................................ 21
Cleaning your computer ...................................................................................................................................... 22
Enabling HP Easy Clean (select products only) ................................................................................. 22
Removing dirt and debris from your computer ................................................................................ 22
Cleaning your computer with a disinfectant ..................................................................................... 23
Caring for wood veneer (select products only) ................................................................................. 24
Packaging and transporting guidelines .............................................................................................................. 24
v

Accessing support information ........................................................................................................................... 24
5 Removal and replacement procedures for authorized service provider parts .................................................... 26
Component replacement procedures .................................................................................................................. 26
Preparation for disassembly ............................................................................................................. 26
Bottom cover ..................................................................................................................................... 26
Battery ............................................................................................................................................... 27
Solid-state drive ................................................................................................................................ 29
Speakers ............................................................................................................................................ 29
Touchpad ........................................................................................................................................... 30
Fingerprint sensor board .................................................................................................................. 32
Fan ..................................................................................................................................................... 32
Heat sink ............................................................................................................................................ 33
Lock bracket ...................................................................................................................................... 35
USB board .......................................................................................................................................... 36
USB door ............................................................................................................................................ 37
System board .................................................................................................................................... 38
Display assembly ............................................................................................................................... 40
Keyboard with top cover ................................................................................................................... 47
6 Backing up, resetting, and recovering ........................................................................................................... 49
Backing up ............................................................................................................................................................ 49
Resetting .............................................................................................................................................................. 49
Recovering ........................................................................................................................................................... 49
Installing the Chromebook Recovery Utility ..................................................................................... 50
Creating recovery media ................................................................................................................... 50
Recovering the Chrome operating system ....................................................................................... 50
Setting up your computer after a reset or recovery ........................................................................................... 51
Erasing and reformatting the recovery media .................................................................................................... 51
7 Specications .............................................................................................................................................. 52
Computer specications ...................................................................................................................................... 52
35.6 cm (14.0 in) display specications .............................................................................................................. 52
8 Statement of memory volatility .................................................................................................................... 54
Current BIOS steps ............................................................................................................................................... 54
Nonvolatile memory usage ................................................................................................................................. 56
Questions and answers ....................................................................................................................................... 58
Using HP Sure Start (select products only) ......................................................................................................... 59
vi

9 Power cord set requirements ........................................................................................................................ 60
Requirements for all countries ............................................................................................................................ 60
Requirements for specic countries and regions ................................................................................................ 60
10 Recycling .................................................................................................................................................. 62
Index ............................................................................................................................................................. 63
vii

viii

1 Product description
This table provides detailed product information.
Table 1-1 Product components and their descriptions
Category Description
Product Name HP Pro c640 G2 Chromebook™
Processors Intel® processors
Intel Core™ i7-1185G7 (3.00 GHz base frequency, up to 4.30 GHz with Intel Turbo Boost Technology, 12 MB
cache, 4 cores)
Intel Core i7-1165G7 (2.80 GHz base frequency, up to 4.70 GHz with Intel Turbo Boost Technology, 12 MB
cache, 4 cores)
Intel Core i5-1145G7 (2.60 GHz base frequency, up to 4.40 GHz with Intel Turbo Boost Technology, 8 MB
cache, 4 cores)
Intel Core i5-1135G7 (2.40 GHz base frequency, up to 4.20 GHz with Intel Turbo Boost Technology, 8 MB
cache, 4 cores)
Intel Core i3-1125G4 (2.00 GHz base frequency, up to 3.70 GHz with Intel Turbo Boost Technology, 8 MB
cache, 4 cores)
Intel Core i3-1115G4 (3.00 GHz base frequency, up to 4.10 GHz with Intel Turbo Boost Technology, 6 MB
cache, 2 cores)
Intel 7505 Pentium® Gold (2.00 GHz base frequency, up to 3.50 GHz with Intel Turbo Boost Technology, 4 MB
cache, 2 cores)
Intel Celeron® 6305 (1.80 GHz base frequency, 4 MB cache, 2 cores)
Graphics Internal graphics
Intel Iris® Xe Graphics (i7/i5 processors)
Intel UHD Graphics (i3/Pentium/Celeron processors)
Supports HD Decode, DX12, and HDMI
Display 35.6 cm (14.0 in), WLED, antiglare, eDP, narrow bezel, nontouch
Full high denition (FHD) (1920 × 1080), UWVA 45, 250 nits
High denition (HD) (1366 × 768), SVA 45, 250 nits
35.6 cm (14.0 in), antiglare, eDP, narrow bezel, Touch-on Panel (TOP)
FHD, UWVA 45, 250 nits
HD, SVA 45, 250 nits
Memory Soldered on board, nonupgradeable
DDR4-3200 dual-channel support
Supports the following congurations:
●16 GB
1

Table 1-1 Product components and their descriptions (continued)
Category Description
●8 GB
Primary storage On-board embedded MultiMedia Controller (eMMC v5.0) conguration
64 GB
32 GB
Solid-state drive (2230, NVMe, PCIe)
256 GB
128 GB
Audio and video HD audio
B&O Play
Dual stereo speakers
HD Camera: HD WFOV + integrated dual microphone
Dual microphone with appropriate software: beam forming, echo cancellation, noise suppression
Supports Google Assistant™ virtual digital assistant
1280 × 720 by 30 frames per second
Camera privacy cover
Wireless Integrated wireless options with dual antennas
Intel® Wi-Fi 6 AX201 + Bluetooth® 5 (non-vPro®)
Media card reader Supports microSD™, SDHC™, SDXC™ up to UHS-104
Push-push insertion/removal
Ports HDMI v2.0
Audio-out (headphone)/audio-in (microphone) combo jack
(2) USB 3.2 Gen2 Type C
(2) USB 3.2 Gen2 Type-A
Keyboard/pointing
devices
Keyboard
Full size, island style, textured, not backlit, with or without ngerprint reader
Full size, island style, 3-coat paint, backlit, with or without ngerprint reader
Clickpad requirements
Multitouch gestures enabled
Taps enabled as default
Power requirements Battery
3 cell, 58 Whr, polymer, HP Long Life, fast charge
AC adapter, USB Type-C
65 W, nPFC, straight, 1.8 m (6 ft)
2 Chapter 1 Product description

Table 1-1 Product components and their descriptions (continued)
Category Description
45 W, nPFC, straight, 1.8 m (6 ft)
Power cord
C5, 1 m (3.3 ft)
Security Fingerprint sensor (select products only)
Camera privacy cover
H1 Secure Microcontroller
Operating system Google® Chrome™ 64
Serviceability End user replaceable parts
AC adapter
3

2 Components
Your computer features top-rated components. This chapter provides details about your components, where
they are located, and how they work.
Right
Use the illustration and table to identify the components on the right side of the computer.
Table 2-1 Right-side components and their descriptions
Component Description
(1) Memory card reader (select products only) Reads optional memory cards that store, manage, share, or
access information.
To insert a card:
1. Hold the card label-side up, with the 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.
(2) 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.
(3) 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.
4 Chapter 2 Components

Table 2-1 Right-side components and their descriptions (continued)
Component Description
(4) USB Type-C® power connector and
SuperSpeed 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 high-speed data transfer,
and (for select products) charges small devices (such as a
smartphone) when the computer is on or in Sleep mode.
NOTE: Use a standard USB Type-C charging cable or cable
adapter (purchased separately) when charging a small
external device.
– and –
Connects a display device that has a USB Type-C connector,
providing DisplayPort™ output.
(5) USB SuperSpeed port Connects a USB device, provides high-speed data transfer,
and (for select products) charges small devices (such as a
smartphone) when the computer is on or in Sleep mode.
NOTE: Use a standard USB Type-A charging cable or cable
adapter (purchased separately) when charging a small
external device.
Left
Use the illustration and table to identify the components on the left side of the computer.
Table 2-2 Left-side components and their descriptions
Component Description
(1) USB SuperSpeed port Connects a USB device, provides high-speed data transfer,
and (for select products) charges small devices (such as a
smartphone) when the computer is on or in Sleep mode.
NOTE: Use a standard USB Type-A charging cable or cable
adapter (purchased separately) when charging a small
external device.
(2) HDMI port Connects an optional video or audio device, such as a high-
denition television, any compatible digital or audio
component, or a high-speed High Denition Multimedia
Interface (HDMI) device.
Left 5

Table 2-2 Left-side components and their descriptions (continued)
Component Description
(3) USB Type-C power connector and SuperSpeed
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 high-speed data transfer,
and (for select products) charges small devices (such as a
smartphone) when the computer is on or in Sleep mode.
NOTE: Use a standard USB Type-C charging cable or cable
adapter (purchased separately) when charging a small
external device.
– and –
Connects a display device that has a USB Type-C connector,
providing DisplayPort™ output.
(4) 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.
(5) Security cable slot Attaches an optional security cable to the computer.
NOTE: The security cable is designed to act as a deterrent,
but it might not prevent the computer from being mishandled
or stolen.
Display
Use the illustration and table to identify the components on the 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.
6 Chapter 2 Components

Table 2-3 Display components and their descriptions (continued)
Component Description
(3) Camera light On (white): The camera is in use.
On (amber): The camera is turned o by the switch.
O: The camera is turned o by the software.
(4) 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.
(5) Camera privacy cover By default, the camera lens is uncovered, but you can slide the
camera privacy cover to block the camera's view. To use the camera,
slide the camera privacy cover in the opposite direction to reveal the
lens.
*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.
Keyboard area
Keyboards can vary by language.
Touchpad
The touchpad settings and components are described here.
Table 2-4 Touchpad component and description
Component Description
Touchpad zone Reads your nger gestures to move the pointer or activate items on the screen.
Keyboard area 7

Speakers and ngerprint reader
Speakers are located on the right and left of the keyboard. Fingerprint readers can be located on the
touchpad, on a side panel of the computer, or on the top cover below the keyboard.
Table 2-5 Speakers and ngerprint reader and their descriptions
Component Description
(1) Speakers (2) Produce sound.
(2) Fingerprint reader (select products only) The ngerprint reader allows you to unlock the computer screen
or to resume computer operations. The reader does not function
as a login device.
▲Touch your nger to the ngerprint reader.
Special keys
Use the illustration and table to locate the special keys.
8 Chapter 2 Components

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.
(3) Power key ●When the computer is o, press the button briey to turn
on the computer.
●When the computer is in the Sleep state, press the button
briey to exit Sleep (select products only).
●When the computer is in Hibernation, press the button
briey to exit Hibernation.
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 for
at least 10 seconds to turn o the computer.
(4) Search key Opens a search box.
Bottom
Use the illustration and table to identify the bottom component.
Table 2-7 Bottom component and its description
Component Description
Vent Enables airow to cool internal components.
NOTE: The computer fan starts automatically to cool internal components
and prevent overheating. It is normal for the internal fan to cycle on and o
during routine operation.
Bottom 9

Labels
The labels axed to the computer provide information that you might need when you troubleshoot system
problems or travel internationally with the computer. Labels can 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
might be asked for the serial number, the product number, or the model number. Locate this
information before you contact support.
Your service label will resemble one of the following examples. Refer to the illustration that most closely
matches the service label on your computer.
Table 2-8 Service label components
Component
(1) Serial number
(2) Product ID
(3) HP product name and model number
Table 2-9 Service label components
Component
(1) HP product name
(2) Model number
(3) Product ID
(4) Serial number
(5) Warranty period
10 Chapter 2 Components

Table 2-10 Service label components
Component
(1) HP product name
(2) Model number
(3) Warranty period
(4) Product ID
(5) Serial number
●Regulatory labels—Provide regulatory information about the computer.
●Wireless certication labels—Provide information about optional wireless devices and the approval
markings for the countries or regions in which the devices have been approved for use.
Labels 11

3 Illustrated parts catalog
Use this table to determine the spare parts that are available for the computer.
Computer major components
To identify the computer major components, use this illustration and table.
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.
12 Chapter 3 Illustrated parts catalog