HP Z27xs G3 Manual

Maintenance and Service Guide
Z27xs G3 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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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 March.2022
Document Part Number:
M13916-Z27xs G3-MSG-V1
Assembly part number: M13916-001
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”.

iii
Table of Contents
1Getting 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
2Monitor features............................................................................................................................................3
Features...................................................................................................................................................3
Front components.....................................................................................................................................4
Rear and side components......................................................................................................................5
Locating the serial number and product number......................................................................................6
3Illustrated parts catalog.................................................................................................................................7
How to order parts....................................................................................................................................7
4Removal and replacement procedures.......................................................................................................10
Preparation for disassembly...................................................................................................................10
Rear Cover.............................................................................................................................................11
Power board...........................................................................................................................................14
Connector repair.....................................................................................................................................15
For Main Board............................................................................................................................17
HDMI connector CN5101.............................................................................................................17
DP 1 connector CN551................................................................................................................18
DP 2 connector CN501................................................................................................................19
TYPE-C connector CN5302.........................................................................................................20
USB 3.0 A 1 connector CN1103..................................................................................................21
USB 3.0 A 2 connector CN1105..................................................................................................21
For Connector Board...................................................................................................................22
USB 3.0 connector CN154 ..........................................................................................................22
USB TYPE-C connector CN152..................................................................................................22
Function test...........................................................................................................................................23
Function test...........................................................................................................................................23
Support and troubleshooting..................................................................................................................23

1
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 personnelwho are familiar with this HPproduct should perform service
or maintenance for it.Beforeperforming 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.

2
●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 product before returning it to the customer.

3
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:
Display features
● 68.6 cm (27 in) diagonal viewable screen area with 3840 ×2160 resolution 4K UHD, plus full-screen
support for lower resolutions; includes custom scaling for maximum image size while
preserving original aspect ratio
● Liquid crystal display (LCD) with active matrix and in-plane switching (IPS)
●Wide color gamut to provide coverage of the P3 color space
●Nonglare 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
●Dual Picture in Picture (PIP) and Picture beside Picture (PbP) functionality to enable the DisplayPort™
and High-DefinitionMultimedia Interface™ (HDMI) inputs to be viewed in each half of the screen
● On-screen display (OSD) adjustments in several languages for easy setup and screen optimization
●Workflow-basedcolor space presets for standard and wide gamut applications
●Energy saver feature to meet requirements for reduced power consumption
● Security cable slot on the rear of the monitor for an optional security cable
● Cable management feature for placement of cables and cords

4
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
Table 1-2 Front components and their descriptions
Component
Description
(1)
Brightness adjustment buttons
Left Button: Brightness Quick Full (default)
Sets the brightness to the maximum available on the
display.Right Button: Brightness Quick Restore (default)
Restores the previous brightness setting.
NOTE: The functions of these buttons can be changed using the
customization features in the OSD. See Using the OSD menu on page 18.
(2)
Power button
Turns the monitor on or

5
Rear and side 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)
OSD control
Pressing the center activates the OSD buttons so that the button labels appear on
theright side of the screen.
Up button: Next Active Input Down
button: Display InformationLeft
button: Brightness
Right button: Color
(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 the DisplayPort cable to a source device such as a computer.
(6)
DisplayPort Out connector
Connects a DisplayPort cable from the monitor to a secondary monitor.
NOTE: This connector is covered by a rubber plug. Remove the plug to connect a
downstream display.
(7)
USB Type-C port (upstream)
Connects a USB Type-C cable to a source device such as a computer. This USB Type-
C portcan function as a DisplayPort audio/video input or as a USB upstream
connection, or it can be used to deliver up to 100 W of power to a device. Power outputs
are 5 V, 9 V, 12 V, 15 V, and 20 V with a total maximum output of 100 W.
This port also enables the downstream USB ports to perform their functions.
(8)
USB port (downstream)
Connects a USB cable to a peripheral device such as a keyboard, mouse, or USB
harddrive.
(9)
USB port (charging)
Connects a USB cable to a peripheral device, such as a keyboard, mouse, or USB
harddrive and supports battery charging.
(10)
USB port (downstream)
Connects a USB cable to a peripheral device, such as a keyboard, mouse, or USB
harddrive.
(11)
USB Type-C port (downstream)
Connects a USB Type-C cable to a peripheral device, such as a keyboard, mouse,
or USBhard drive.

6
Locating the serial number and product number
The serial number and product number are located on a label on the rear of the monitor panel. You may
need these numbers when contacting HP about the monitor model.

7
3 Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
Item
Description
Qty
1
LCD LM270WR8-SSB1 GZ LGD
1
2
CONNECTOR BOARD
1
3
KEY_POWER
1
4
LENS
1
5
MIDDLE_FRAME L27W-Ehp1-p1
1
6
INSULATING SHEET 215*223.1
1
7
ADAPTER BOARD NA
1
8
CONNECTOR BOARD
1
9
MAINFRAME
1
10
CONNECTOR BOARD
1
11
KEY_FUNCTION
1
12
REAR_COVER N/A
1
13
HINGE ASS'Y
1
14
HINGE_LEFT
1
15
stand ass'y NA NA
1
16
BASE_ASS’Y N/A NA
1
17
LOGO HP NA
1
18
CONNECTOR BOARD
1