HP Z27K G3 Manual

Maintenance and Service Guide
Z27k G3 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: M14216-Z27k G3-
MSG-V1
Assembly part number: M14216-001
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.................................................................................................................................................. 5
Rear and side components..................................................................................................................................... 6
Locating the serial number and product number .................................................................................................. 8
3Illustrated parts catalog .............................................................................................................................................. 9
How to order parts ............................................................................................................................................... 10
4Removal and replacement procedures...................................................................................................................... 13
Preparation for disassembly................................................................................................................................ 13
Rear Cover ............................................................................................................................................................ 13
Power board......................................................................................................................................................... 16
Connector repair .................................................................................................................................................. 18
HDMI connector HDMI1............................................................................................................................. 18
DP connector DP1 DP2 ............................................................................................................................. 19
USB-C connector USBC.............................................................................................................................. 20
RJ45 connector RJ45 ................................................................................................................................ 21
USB-A connector USB2/USB3 ................................................................................................................... 21
USB-A connector USB4/USB5 ................................................................................................................... 21
Function test ........................................................................................................................................................ 22
Support and troubleshooting .............................................................................................................................. 22
Index..................................................................................................................................................................... 24

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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

2
location.
●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
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
●68.6 cm (27 in) diagonal viewable screen area with 2560 × 1440 resolution or 3840 × 2160 resolution,
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 sRGB color spaces
●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,
HDMI, and USB Type-C inputs to be viewed in each half of the screen (select products only)
●On-screen display (OSD) adjustments in several languages for easy setup and screen optimization
●Color space presets for sRGB and BT.709
●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
Connectors
●DisplayPort™ video input (cable included)
●DisplayPort video output (cable included)
●High-Definition Multimedia Interface™ (HDMI) video input
●USB Type-C® port
●USB hub with one USB Type-C port that connects to the computer (upstream) and four USB ports that
connect to USB devices (downstream)
●USB Type-C–to–USB Type-C DisplayPort Alt Mode, 100 W power delivery cable (select products only)
●DisplayPort cable (select products only)
●HDMI cable (select products only)
●Plug and Play capability, if supported by your operating system
●RJ-45 (network) jack (select products only)

4
Monitor stand
●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
thenremove it with the convenient sliding tab release
●VESA® mounting bracket for attaching the monitor head to a wall-mount device or swing arm
●VESA mounting capability (100 × 100 mm) for attaching the monitor to a swing arm mount
●Support for a mounting bracket to attach the monitor to a workstation
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.

5
Front components
To identify the components on the front of the monitor, use this illustration and table.

6
Rear and side components
To identify the components on the rear of the monitor, use this illustration and table.
Table 2-1 Rear and side components and their descriptions
Component
Description
(1)
OSD control
Activates the OSD buttons so that the button labels appear on the
right side of thescreen.
(2)
Security cable slot
Connects an optional security cable.
(3)
Master power switch
Turns on or off all power to the monitor.
(4)
Power connector
Connects the power cord.
(5)
HDMI port
Connects the HDMI cable to a source device such as a computer.
(6)
DisplayPort connector
Connects the DisplayPort cable to a source device such as a
computer.
(7)
DisplayPort connector
OUT
Connects the DisplayPort cable from the monitor to a
secondary monitor.
(8)
USB Type-C port with DP
Alt Mode 1.4, USB
upstream data,and
maximum power
deliveryup to 100 W
Connects the USB Type-C cable to a source device such as a
computer
Charges most USB Type-C devices even when the monitor is in
sleep mode
Note: The monitor must be set to Performance Mode.
This port also enables the USB Type-A ports to perform their
functions.
(9)
RJ-45 (network) jack
Connects an RJ-45 Ethernet network cable to the monitor.
(10)
USB port
Connects a USB cable to a peripheral device, such as a keyboard,
mouse, or USB harddrive.
(11)
USB port
Battery charging 1.2
Connects a USB cable to a peripheral device, such as a keyboard,
mouse, or USB harddrive and supports battery charging 1.2.

7
(12)
USB port
Connects a USB cable to a peripheral device, such as a keyboard,
mouse, or USB harddrive.
(13)
USB port
Battery charging 1.2
Connects a USB cable to a peripheral device, such as a keyboard,
mouse, or USB harddrive and supports battery charging 1.2.

8
Locating the serial number and product number
The serial number and product number are located on the rear of the monitor. You may need these numbers
when contacting HP about the monitor model.
For worldwide models(except India):
Barcode label & Spec label
For India:
Barcode label & Spec label

9
3Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
Table 3-1: Monitor major components and their descriptions
Item
Description
Qty
1
#LCM Module Z27k G3
1

10
2
#Main Chassis brkt Z27k G3
1
3
# Power Board Z27k G3
1
4
# Interface Board Z27k G3
1
5
# SCRW M3*6 TAPPING META
6
6
# SCRW_CAP HEAD_M4*8_CHQ1018
1
7
# Power Mylar Z27k G3
1
8
# SCRW_tapping_wafer_M3*8.0_White Ni
2
9
# SCRW MAC TRU M3*0.5*L3.0 NI
4
10
# IO COVER Z27k G3
1
11
# SCRW MAC WAFER M3*0.5*L4NI/
3
12
# BEZEL BOTTOM Z27k G3
1
13
# POWER_LENS_Z24F_Z24_Z27
1
14
# POWER_KEY_Z24F_Z24_Z27
1
15
# Power Key Board Z Series
1
16
#SCRW_Tapping_Without_Taper_M2*2.4
2
17
# SCRW_M2X2.7X0.8T_U2419H
4
18
# SCRW_M2X2.8_U2419H
2
19
# REAR_COVER_Z27k G3
1
20
# SIDE_USB_HOLDER_Z24F_Z24_Z27
1
21
# Side USB Board Z Series
1
22
# SCRW_TAP_PAN_M3*6_NI
2
23
# OSD_KEY_HOLDER_Z_SERIES
1
24
# OSD Board Z Series
1
25
# JOYSTICK_CAP_Z_SERIES
1
26
# SCRW_TAP_PAN_M3*6_NI
2
27
# Z_LOGO_48MM_PET_BLACK
1
28
# Assy hinge for Z27k G3
1
29
# SCRW_MEC_FLAT_M4L6_NI_STE
4
30
# Piovt Cover for Z27k G3
1
31
# Assy stand column for Z27k G3
1
32
# Assy base for Z27k G3
1
33
# Driver Board Z27k G3
1
How to order parts
The HP authorized repair center can purchase the power board from HP.

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Power board
Description
HP spare part number
Manufacturer part number
POWER BD MF27HHC-BQDX(C) Z27K G3 DIP
M97972-001
755.06D05.0001
Capacitors and connectors are available for purchase from the following EU distributors:
Digi-Key (RUBYCON ALU CAP): www.digikey.com
CAPXON: www.capxongroup.com
Capacitors by distributor
Component description
Location
Component
distributor
Distributor part number
CAP EL 330U 35V M
10X12.5 ZLH RUBYCON
AC714,AC715,AC717,
AC718,AC719
RUBYCON
35ZLH330MEFCT8 10X12.5
CAP EL 330U 35V M
10*12.5 P5 CAPXON
CAPXON
ZH331M035G125ETABRZ
10*12.5
Connectors by manufacturer
Component
description
Location
identifier
Component
distributor
Distributer part number
Remark
HDMI
HDMI1
Switchcraft
Inc.
https://www.digikey.com
PN:
137-RAHHD19TR-ND
1.Modify the rear cover I/O
metal and plastic.
DP
DP1
DP2
Molex
https://www.digikey.com
PN:
WM14328DKR-ND
1. Only DP1.1
2. Modify the rear cover
I/O metal
3. Cut off the through hole
USB-C
USBC
Molex
https://www.digikey.com
PN:
900-2171840001DKR-ND
Cut off the Pin as below
RJ45
RJ45
Adam Tech
https://www.digikey.com
PN:
2057-MTJ-88TX1-LV-ND
1. Modify the pin type
as below.

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2. chenge the length
from 20.75mm to
23.5mm
3. Modify the rear cover
I/O metal and plastic.
USB-A
USB2
USB3
Molex
https://www.digikey.com
PN:
WM10413TR-ND
1.Cut off the Pin as below
USB-A
USB4
USB5
Molex
https://www.digikey.com
PN:
WM10413TR-ND
1.Modify the rear cover
I/O metal and plastic.
2. Change the height
from 15mm to
11.5mm
3.Cut off the Pin as below
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.
NOTE: HP continually improves and changes product parts. For complete and current information about
supported parts for your computer, go to http://partsurfer.com, select your country or region, and then
follow the on-screen instructions.
Internal and External Power Supplies are available for purchase from the following EU distributor: EET
https://www.eetgroup.com/en-eu/

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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:
Rear Cover
Before removing the Rear Cover, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 13.
1) Pull the release button to remove Stand Base From Display Head

14
2) Remove Rear Cover From Display Head: Use the tool to remove the hinge cover, then Release the four
screws from back bracket and remove the hinge, then Loose all the hooks by hand for pulling the rear
cover
3) Remove USB BD Screws to remove USB BD: Remove the EMI gasket, then loose the two hooks by hand, then
remove the cable
4) Release OSD key BD from rear cover

15
5) Remove IO cover from display head(Remove three screws and loose three hooks by hand)
6) Release the bracket with panel: disconnect all inside cable, then remove the four screws from the back
bracket.
7) Remove bezel bottom ASSY from display head(Remove six(4+2) screws), then remove bracket chassis
module.

16
8) Remove Power Key Board from Bezel bottom assy.(Remove two screws)
9) Disassemble Bracket Assembly: remove black Mylar, then release the six screws for releasing the power
board and interface board. Remove the two AC screws and remove all boards.
Power board
The power board part number is 755.06D05.0001.
Before removing the power board, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 13.
Remove the power board:
1) The HP Z27k G3 power board connector has no connector:

17
2) Locate the part number location on the board.