HP E27q G5 Manual

Maintenance and Service Guide
E27q G5 model
SUMMARY
This guide provides information about spare parts, removal and replacement of parts, diagnostic tests, problem
troubleshooting, and more.

© Copyright 2022 HP Development Company,
L.P.
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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: Dec. 2022
Document Part Number: N22741-E27q G5-
MSG-V1
Assembly part number: N22741-001
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
1Getting started............................................................................................................................................................................................... 2
Important safety information ...............................................................................................................................................................2
Important service information and precautions..................................................................................................................................2
RoHS (2002/95/EC) requirements......................................................................................................................................................3
General descriptions ..............................................................................................................................................................................3
Firmware updates...................................................................................................................................................................................3
Before returning the repaired product to the customer....................................................................................................................3
2Monitor features ............................................................................................................................................................................................ 4
Features....................................................................................................................................................................................................4
Front components..................................................................................................................................................................................6
Rear components....................................................................................................................................................................................7
Locating the serial number and product number...............................................................................................................................8
3Illustrated parts catalog................................................................................................................................................................................. 9
How to order parts...............................................................................................................................................................................11
4Removal and replacement procedures...................................................................................................................................................... 12
Preparation for disassembly ................................................................................................................................................................12
Rear Cover.............................................................................................................................................................................................13
Power board..........................................................................................................................................................................................18
Connector repair...................................................................................................................................................................................19
HDMI connector CN502.......................................................................................................................................................21
DP connector CN501.............................................................................................................................................................21
USB UP connector CN105....................................................................................................................................................22
USB1\ 2 connector CN106\CN104 ....................................................................................................................................23
USB 3\4 connector CN1004\CN1005................................................................................................................................24
Function test .........................................................................................................................................................................................25
Support and troubleshooting..............................................................................................................................................................26
Index ......................................................................................................................................................................................................27

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1Getting 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.
●If you must replace a capacitor, insert new parts carefully to avoid a short circuit caused by the near pin.

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●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
product before returning it to the customer.

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2Monitor features
This chapter provides an overview of the monitor’s features.
Features
Depending on the model, your monitor might include the following features:
Display features
●68.60 cm (27 in), plus full-screen support for lower resolutions; includes custom scaling for maximum image size
while preserving original aspect ratio
●True 8 bit (QHD only)
●sRGB 99%
●Antiglare panel with an LED backlight
●Touch screen capability (select products only)
●Ergonomic monitor setup guide (via the HP Display Center software) during first time use
●Tilt, swivel, height-adjustable, and pivot capabilities
●On-screen display (OSD) adjustments in several languages for easy setup and screen optimization
●Joypad OSD navigation
●Energy saver feature to meet requirements for reduced power consumption
●HP Eye Ease (TUV Low Blue Light Hardware Solution, certified and with a 75 Hz Max Refresh rate)
●Compatible with displays software including:
– HP Display Center
– HP Display Manager
●Secure firmware updates with HP Display Center
●Security cable slot on the rear of the monitor for an optional security cable
●Cable management feature for placement of cables and cords
Connectors
●DisplayPort™ video input
●High-Definition Multimedia Interface® (HDMI®) video input
●USB Type-B port
●USB Type-A port
●Plug and Play capability, if supported by your operating system

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Monitor stand
●Removable stand for flexible monitor head mounting solutions
●VESA® mounting capability (100 × 100 mm) for attaching the monitor to a swing arm mount
NOTE: For safety and regulatory information, see Legislation and regulations on page 39. To access the latest user guide, 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.
Table 1-1: Front components and their descriptions
Component Description
(1) Power button Turns the monitor on or off.
(2) Power LED Indicates that the monitor is powered on.

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Rear components
Rear components
To identify the components on the rear of the monitor, use this illustration and table.
Table 1-3: Rear components and their descriptions
Component Description
(1) Joypad Press to open the OSD settings.
(2) Security cable slot Connects an optional security cable.
(3) Power connector Connects a power cord.
(4) HDMI port Connects the HDMI cable to a source device such as a computer.
(5) DisplayPort connector Connects a DisplayPort cable to a source device such as a computer.
(6) USB Type-B port Connects a USB Type-B to A cable.
NOTE: The USB hub is enabled only if the monitor is connected to the computer via a
USB Type-B to A cable.
NOTE: The touch screen function (select products only) is enabled only if the monitor is
connected to the computer via a USB Type-B to A cable.
(7) USB Type-A ports (2)
Connects a USB device, provides 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.
(8)
USB Type-A port (1), USB
Type-A port with battery fast-
charging 1.2 (1)
USB port: Connects a USB device, provides data transfer, and (for select products) charges
small devices (such as a smartphone) when the computer is on or in Sleep mode.
USB port with battery fast-charging 1.2 (5 V × 1.5 A = 7.5 W): Connects a USB device,
provides high-speed data transfer, and charges small devices (such as a smartphone), even
when the monitor is DC off with OSD performance mode on.
NOTE: Use a standard USB Type-A charging cable or cable adapter (purchased
separately) when charging a small external device.

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Locating the serial number and product number
The Label is located on the rear of the monitor.
You may need these numbers when contacting HP about the monitor model.
Label

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3Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
Item
Description
Qty
1 LOGO HP 12 1
2 MIDDLE_FRAME L27W-2Ghp2-p2 1
3 SPONGE 1
4 LENS 1
5 KEY_POWER 1
6 MAINFRAME 1
7 KEY_FUNCTION 1
8 KEY 1
9 REAR_COVER L27W-2Ghp2-p2 1
10 COVER_VESA L27W-2Ghp2-p2 1

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11 HINGE ASS''Y 1
12 BASE_ASS’Y L27W-Ghp2-p2 N/A 1
13 stand ass''y L27W-2Ghp2-p2 NA 1
14 LOGO HP size 72 1
15 Spring Finger 2
16 LCD LM270WQ4-SSE1 HZ LGD 1
17 ADAPTER BOARD NA 1
18 CONVERSION 715GD333* 1
19 USB BOARD 1
20 KEY BOARD 1
21 KEY BOARD 1
S1 SCREW M4 6 1
S2 SCREW D3 6 7
S3 SCREW M3 4 13
S4 SCREW Q2 3 2
S5 SCREW Q3 6 4
S6 SCREW M4 10 4
S7 SCREW M3 3 2

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How to order parts
The HP authorized repair center can purchase the power board from HP.
Power board
Description
HP spare part number
Manufacturer part number
PSU E27q G5 1st Source
N42718-001
PLPCMH311IQA3
（
CF
）
PLPCMH311IQA4(C2)
PSU E27q G5 2nd Source N42718-002 PLPCMH511GQA1
PSU E27q G5 3rd Source
N42718-003
PLPCMH671KQA2
Capacitors and connectors are available for purchase from the following EU distributors:
•RS Component: Capacitors | RS Components (rs-online.com)
Capacitors by distributor
Component description
Location
Component
distributor
Distributor part number
NA NA NA NA
Connectors by manufacturer
Component description
Location identifier
Component
distributor
Distributer part number
HDMI
CN502
NA
Contact HP Support
DisplayPort
CN501
NA
Contact HP Support
USB UP CN105 RS 692221030100
（Wurth Elektronik）
USB 1/2
CN106/CN104
RS
10117836-002LF
(Amphenol ICC)
USB 3/4 CN1004/CN1005 RS 10117836-002LF
(Amphenol ICC)
NOTE: Rear cover and chassis need to be modified to hold connector. Connector may need modifications to
meet functional, safety and regulatory requirements accordingly if it doesn’t match exactly.
NOTE: The connector may need to be modified to meet functionality, regulatory and safety requirements if it is
not an exact match.
You can purchase cables from the HP part store at https://partsurfer.hp.com/Search.aspx.
Internal and External Power Supplies are available for purchase from the following EU distributor: EET
https://www.eetgroup.com/en-eu/
NOTE: HP continually improves and changes product parts. For complete and current information about
supported parts for your product, go to https://partsurfer.hp.com/Search.aspx, select your country or region, and
then follow the on-screen instructions.

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4Removal and replacement procedures
Adherence to these procedures and precautions is essential for proper service.
Preparation for disassembly
Use this information to properly prepare to disassemble and reassemble the monitor.
1) Read the “Important safety information” and “Important service information and precautions” sections in
the “Getting started” chapter of this guide.
2) Clean the room for disassembly.
3) Identify the disassembly area.
4) Check the position that the monitors are to be placed along with the number of monitors. Prepare the area for
material flow according to the disassembly layout.
5) Be sure to have the following equipment and materials:
•Press fixture
•Working table
•Screwdriver
•Knife
•Gloves
•Cleaning cloth
•ESD protection
•Scraper bar in the following dimensions:

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Rear Cover
Before removing the Rear Cover, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 12.
Remove the Rear Cover:
1) Remove the Stand-Base Assy and remove four screw to remove the rear cover.
2) Use your fingers to split the left and right sides apart between the middle frame and rear case.
3) Insert the scraper bar tool into the gap between the middle frame and rear case, and then rotate. The hook opens.
Repeat the steps.

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4) Disassemble the Rear Cover and disconnect the connectors.

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5) Remove the Mylar.
6) Disassemble 6 screws from the boards.
7) Disassemble all the boards from housing.
8) Disconnect all the wires from the board.

16

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9) Remove the screws to remove the middle frame and the panel.

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Power board
The power board part number is 1st Source PLPCMH311IQA3（CF）PLPCMH311IQA4(C2), 2nd Source
PLPCMH511GQA1 and 3rd Source PLPCMH671KQA2.
Before removing the power board, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 12.
Remove the power board:
1) The HP E27q G5 power board connector position is as follows:
2) Locate the part number location on the board.
CN
902
CN
801
Warning: After unplugging the
power supply, the capacitance
is still charged, do not touch
and discharge the capacitor.