HP E22 G4 Manual

Maintenance and Service Guide
E22 G4 model
SUMMARY
This guide provides information about spare parts, removal and replacement of parts, diagnostic tests, problem
troubleshooting, and more.

© Copyright 2021 HP Development Company,
L.P.
AMD is a trademark of Advanced Micro
Devices, Inc. Bluetooth is a trademark owned
by its proprietor and used by HP Inc. under
license. NVIDIA is a trademark and/or
registered trademark of NVIDIA Corporation
in the U.S. and other countries. USB Type-C
and USB-C are registered trademarks of USB
Implementers Forum. DisplayPort and the
DisplayPort logo are trademarks owned by the
Video Electronics Standards Association
(VESA) in the United States and other
countries.
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: November. 2021
Document Part Number: L97478-E22 G4-
MSG-V1
Assembly part number: L97478-101
Product notice
Only trained service personnel familiar with this
product should service it. Before performing any
maintenance or service, be sure to read
“Important Safety Information”.

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Table of Contents
1. Getting started ..........................................................................................................................................................................................1
Important safety information..........................................................................................................................................................1
Important service information and precautions ...........................................................................................................................1
RoHS (2002/95/EC) requirements................................................................................................................................................2
General descriptions .........................................................................................................................................................................2
Firmware updates ..............................................................................................................................................................................2
Before returning the repaired product to the customer .............................................................................................................2
2. Monitor features........................................................................................................................................................................................4
Features ...............................................................................................................................................................................................4
Front components.............................................................................................................................................................................5
Rear components...............................................................................................................................................................................6
Locating the serial number and product number ........................................................................................................................7
3. Illustrated parts catalog..............................................................................................................................................................................8
How to order parts............................................................................................................................................................................9
4. Removal and replacement procedures ................................................................................................................................................11
Preparation for disassembly...........................................................................................................................................................11
Rear cover .........................................................................................................................................................................................11
Power board .....................................................................................................................................................................................15
Connector repair..............................................................................................................................................................................16
USB 3.0 TYPE B CN7732 ............................................................................................................................................................17
Repair the usb connector: ..............................................................................................................................................................17
USB 3.0 TYPE A CN103 ..............................................................................................................................................................18
VGA CN503 ....................................................................................................................................................................................18
HDMI connector CN502 .................................................................................................................................................18
DP connector CN501 .......................................................................................................................................................19
Function test.....................................................................................................................................................................................20
Table 4-1: Function test .................................................................................................................................................................20
Support and troubleshooting ........................................................................................................................................................20

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1. Getting started
Read this chapter to learn about safety information and where to find additional HP resources.
Important safety information
Carefully read the cautions and notes within this document to minimize the risk of personal injury to service personnel.
The cautions and notes are not exhaustive. Proper service methods are important to the safe, reliable operation of
equipment. Improper service methods can damage equipment.
The service procedures recommended and described in this service manual provide effective methods of performing
service operations. Service engineers should have prior repair knowledge and experience as well as appropriate training
for the product before performing service procedures.
●Be sure your working environment is dry and clean and meets all government safety requirements.
●Be sure that other persons are safe while you are servicing the product.
●Do not perform any action that can cause a hazard to the customer or make the product unsafe.
●Use proper safety devices to ensure your personal safety.
●Always use approved tools and test equipment for servicing.
●Never assume the product’s power is disconnected from the main power supply. Check that it is
disconnected before opening the product’s cabinet.
●Modules containing electrical components are sensitive to electrostatic discharge (ESD). Follow ESD safety
procedures while handling these parts.
●Some products contain more than one battery. Do not disassemble or expose a battery to high temperatures,
such as throwing into fire, or the battery may explode.
●Refer to government requirements for battery recycling or disposal.
This information provides general service information for the monitor. Adherence to the procedures and
precautions is essential for proper service.
IMPORTANT: Only trained service personnel who are familiar with this HP product should perform service or
maintenance for it. Before performing any service or maintenance, personnel must read the important safety information.
IMPORTANT: You must disconnect the power cord from the power source before opening the monitor to
prevent component damage.
Important service information and precautions
●Repair must be performed by professional service technicians in a repair center. End users should not
perform these procedures.
●Please note during servicing that the primary side is the high voltage area.
●This monitor meets ROHS requirements. Be sure to use lead-free solder wire when soldering.
●If you must change a capacitor, be sure to match the polarity as printed on the PCB.
●If you must replace a capacitor, make sure the specification and part number match the BOM and location.

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●If you must replace a capacitor, insert new parts carefully to avoid a short circuit caused by the near pin.
●Do not get the board wet. Water and moisture can cause a short circuit that causes malfunctions.
●To avoid damage, be sure to use lead-free solder.
●When soldering, work quickly to avoid overheating the circuit board.
●Keep the soldering iron tip clean and well tinned when replacing parts.
●After repair, perform a close inspection of the circuit board to confirm it is in good condition.
●After repair, perform a function test to confirm the power supply is working properly.
ERP Lot5 requirement
1. A professional repairer must have the technical competence to repair electronic displays and comply with the
applicable regulations for repairers of electrical equipment in the Member States where the repairer operates.
Reference to an official registration system as professional repairer, where such a system exists in the Member
States, shall be accepted as proof of compliance.
2. A professional repairer must have insurance that covers liabilities resulting from repairs, regardless of whether
required by the Member State.
RoHS (2002/95/EC) requirements
Applied to all countries that require RoHS.
The RoHS (Restriction of Hazardous Substance in Electrical and Electronic Equipment Directive) is a legal
requirement by the EU (European Union) for the global electronics industry sold in the EU and other countries. Any
electrical and electronics products launched in the market after June 2006 should meet this RoHS requirement.
Products launched in the market before June 2006 are not required to be compliant with RoHS parts. If the original
parts are not RoHS complaint, the replacement parts can be non-ROHS complaint. If the original parts are RoHS
compliant, the replacement parts MUST be RoHS complaint.
If product service or maintenance requires replacing parts, confirm the RoHS requirement before replacement.
General descriptions
This manual contains general information. There are two levels of service:
Level 1: Cosmetic/appearance/alignment service
Level 2: Circuit board or standard parts replacement
Firmware updates
Firmware updates for the monitor are available at support.hp.com. If no firmware is posted, the monitor does not
need a firmware update.
Before returning the repaired product to the customer
Perform an AC leakage current check on exposed metallic parts to be sure the product is safe to operate without the
potential of electrical shock. Do not use a line isolation transformer during this check.
Measurements that are not within specified limits present a possible shock hazard. You must check and repair the

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product before returning it to the customer.

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2. Monitor features
This chapter provides an overview of the monitor’s features.
Features
Depending on the model, your monitor might include the following features:
54.6 cm (21.5 in) diagonal viewable screen area with 1920 ×1080 resolution
In-plane switching (IPS) panel
Non glare panel with an LED backlight
Wide viewing angle to allow viewing from a sitting or standing position, or moving from side to side
Tilt, swivel, and height adjustment capabilities
Pivot capability to rotate the monitor head from landscape to portrait orientation
Removable stand for flexible monitor head mounting solutions
HP Quick Release 2 device to quickly attach the monitor head to the stand with a simple click, and then
remove it with the convenient sliding tab release
DisplayPort™video input (cable included)
High-Definition Multimedia Interface™(HDMI) video input (cable included)
VGA video input (cable included in select regions)
USB hub with one USB Type-B port (cable included) that connects to the computer (upstream) and four USB
ports that connect to USB devices (downstream)
Four on-screen display (OSD) buttons, three that you can reconfigure to quickly allow selection of the most
commonly used operations
Plug and Play capability if supported by your operating system
VESA®mounting bracket for attaching the monitor head to a wall-mount device or swing arm
Security cable slot on the rear of the monitor for an optional security cable
Cable management feature for placement of cables and cords
On-screen adjustments in several languages for easy setup and screen optimization
Energy saver feature to meet requirements for reduced power consumption
NOTE: For safety and regulatory information, refer to the Product Notices provided in your documentation kit.
To access the latest user guides or manuals for your product, go to http://www.hp.com/support and follow the
instructions to find your product. Then select Manuals.

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Front components
To identify the components on the front of the monitor, use this illustration and table.
Press the power button on the bottom of the monitor to turn it on.

6
Rear components
To identify the components on the rear of the monitor, use this illustration and table.
Table 1-1: Rear components and their descriptions
Component
Function
1
Security cable slot
Connects an optional security cable.
2
Power connector
Connects the power cord
3
VESA release button
Connects the DisplayPort cable to a source device
such as a computer or game console
4
DisplayPort connector
Connects the DisplayPort cable to a source
device such as a computer or game console
5.
HDMI port
Connects the HDMI cable to a source device
such as a computer or game console
6
VGA port
Connects the VGA cable to the source device
7
USB Type-B port (upstream)
Connects the USB Type-B cable to a source device
such as a computer or game console.
8
USB ports (2) (downstream)
Connect a USB cable to a peripheral device, such as a
keyboard, mouse, or USB hard driver
9
USB ports (2) (downstream)
Connect a USB cable to a peripheral device, such as a
keyboard, mouse, or USB hard drive.