HP OMEN 27u Manual

Maintenance and Service Guide
OMEN 27u 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: January 2022
Document Part Number:
M54677-OMEN 27u-MSG-V1
Assembly part number:
M54677-001
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/Rear components ......................................................................................................................................... 4
Locating the serial number and product number .................................................................................................. 6
3Illustrated parts catalog .............................................................................................................................................. 7
How to order parts ................................................................................................................................................. 8
4Removal and replacement procedures ........................................................................................................................ 9
Preparation for disassembly.................................................................................................................................. 9
Rear Cover .............................................................................................................................................................. 9
Connector repair .................................................................................................................................................. 14
Headphone connector CN800................................................................................................................... 15
HDMI connector HDMI280, HDMI281 ........................................................................................................ 16
DP connector DP250................................................................................................................................. 16
DC JACK connector CN102 ........................................................................................................................ 17
USB-C connector P600.............................................................................................................................. 17
USB-A connector P601, P602 ................................................................................................................... 18
Function test ........................................................................................................................................................ 19
Function test ........................................................................................................................................................ 19
Support and troubleshooting .............................................................................................................................. 19
Index..................................................................................................................................................................... 21

1
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.

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
2Monitor features
This chapter provides an overview of the monitor’s features.
Features
Depending on the model, your monitor might include the following features:
●68.5 cm (27-inch) diagonal viewable screen area with 3840 x2160 resolution, plus full-screen support
for lower resolutions; includes image scaling for three present mode options, Fill to Screen, Fill to
Aspect Ratio or Pixel-for-pixel.
●HP Eye Ease with Eyesafe® certification (default mode) to reduce blue light to keep your eyes
comfortable
●Flicker-free feature for optimal eye comfort and viewing (Remark: Flicker-Free only effective on static
refresh rate and backlight control, but disable when MPRT is on. There is no "visible" flicker within the
range of 0~3000Hz)
●Liquid crystal display (LCD) with active matrix and in-plane switching (IPS)
●Wide color gamut to provide coverage of sRGB/DCI-P3 color spaces
●Anti-Glare panel with an LED backlight
●Wide viewing angle to allow viewing from a sitting or standing position, or when moving from side to
side
●Tilt and height adjustment capabilities
●Picture beside Picture (PbP) functionality to enable the DisplayPort and 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
●Color space presets for sRGB and DCI-P3
●Energy saver feature to meet requirements for reduced power consumption
Connectors
●DisplayPort™ video input (cable provided with select products only)
●High-Definition Multimedia Interface™(HDMI) video input (cable provided with select products only)
●Audio-out (headphone) jack (cable provided with select products only)
●USB Type-C–to–USB Type-A cable and DisplayPort cable (cable provided with select products only)
●Plug and Play capability, if supported by your operating system
Monitor stand
●Removable stand for flexible monitor head mounting solutions
●VESA® mounting capability (100 ˟100 mm) for attaching the display 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.

4
Front/Rear components
To identify the components on the rear of the monitor, use this illustration and table.
Back of monitor showing locations of controls
Table 1-1: Front and rear components and their descriptions
Component
Function
1
Power light
White: The monitor is on.
Amber: The monitor is in a reduced power state
because of inactivity.
2
OSD controller
Opens the OSD menu and makes adjustments to
monitor settings.
3
Power button
Turns the monitor on or off.

5
Rear component location showing
Table 1-2: Rear components and their descriptions
Component
Function
1
Audio-out (headphone) jack
Connects the headphone or earduds.
CAUTION: To reduce the risk of personal injury,
adjust the volume before using headphones or
earbuds. For additional safety information, see the
Product Notices provided in your documentation
kit.
2
HDMI 2.0 port
Connects the HDMI cable to a source device such
as a computer or game console.
3
HDMI 2.1 port
Connects the HDMI 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
Power connector
Connects an AC adapter.
6
Security cable slot
Connects an optional security cable.
7
USB Type-C port (Upstream)
Connects a USB Type-C to A cable to a source
device such as a computer or game console’s USB
Type-A receptacle.
*It’s USB hub for data only.
This port only enables the USB Type-A ports to
perform their functions
8
USB Type-A ports (downstream)
Connects a USB cable to a peripheral device, such

6
as a keyboard, mouse, or USB flash drive.
9
Headphone storage
The monitor features a headphone hook at the top
of the stand for convenient headphone storage
Locating the serial number and product number
The SPEC label (1) and Barcode label (2) are located on the rear of the monitor. The serial number and product
number are located on a Safety label. You may need these numbers when contacting HP about the monitor
model.
Label Location
For worldwide models (except India):
Spec label
Spec label for Worldwide region
Barcode label
Barcode label for Worldwide region
Barcode label for India region

7
3Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
Mechanical explosion
Item
Description
Qty
1
LG Panel
1
2
Main BKT
1
3
Middle frame
5
4
Bottom Ambient light PCB
1
5
Power Lens PCB
1
6
Keypad PCB
1
7
OSD control
4
8
Rear cover Assy
1
9
Ambient light Lens
1
10
Ambient light PCB
4
11
IF Board
1
12
Speaker
1
13
Heat Sink
1
14
Top BKT
1
15
Rear Pack Assy
1
16
VESA Cover
1
17
Hinge Assy
1
18
Stand Base
1

8
How to order parts
Capacitors and connectors are available for purchase from the following EU distributors:
•Farnell: Farnell UK - Electronic Components Distributor
•RS Component: Capacitors | RS Components (rs-online.com)
•Digi-Key Component: Digi-Key Electronic United Kingdom
Connectors by manufacturer
Component description
Location identifier
Component
distributor
Distributor part number
HDMI Port
HDMI280, HDMI281
Farnell
208658-1051
Display Port
DP250
Farnell
47272-0001(Notes: the chassis and
rear cover need to be modified to make
the connector opening larger)
Headphone
CN800
N/A
N/A (Please contact HP Service)
USB-A
P601, P602
RS
48392-0003(Notes: the chassis and
rear cover need to be modified to make
the connector opening larger)
USB-C
P600
Farnell
DX07S024JJ2R1300
DC jack
CN102
N/A
N/A (Please contact HP Service)
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/.

9
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 9.
1) Disassemble Stand. Use the hex key attached to the above base, Release the 2 pcs screw, Separate the
head and foot of the monitor.

10
Disassemble Stand
2) Disassemble VESA screws:
A: Remove this hole with a plastic disassembly rod; Remove VESA cover.
B: Use a Phillips screwdriver to remove the above 6PCS screws, Separate the stand hinge from the display
head.
C: Use a Phillips screwdriver to remove the above 6 pcs screws.
Disassemble VESA screws
3) Disassemble pack Cover& Shielding BKT:
A: Use a plastic disassembly rod; insert the heat dissipation hole on the side of the small back cover, pry
the small back cover and remove it
B: Use a Phillips screwdriver to remove the above 3pcs screws, Remove the metal parts of the top cover.

11
Disassemble pack Cover& Shielding BKT
4) Disassemble Main board.
A: Remove thermal PAD
B: Remove the above screws with a Phillips screwdriver
C: Remove the LED holder on the main board
D: Remove all EE cable
E: Remove all Main board
Separate cable and other materials from main board
5) Disassemble Speaker.
A: Remove 4pcs screw.
B: Remove the speaker.
C: Remove EE Led FFC Cable.

12
Separate speakers and cables
6) Disassemble LED light Assembly.
A: Remove 8 pcs M4 screw
B: Remove 4 pcs LED Bar
C: Remove 4pcs T3 screw
Separate LED bar PCBA and cables
7) Disassemble Ambient Light Led Lens

13
Separate Ambient Light LED Lens
8) Disassemble Middle Frame
A: Remove all EE Cables
B: Remove power LED Board
C: Remove AMBILIGHT Bottom board on display chin.
D: Remove all M3 screws
E: Remove Middle Frame
Separate cables& PCBAs from middle frame
9) Disassemble Main BKT: Remove M3 screws and Main BKT.

14
Separate Main BKT
10) Disassemble Gasket &Heat Sink: Remove M3 screws & Heat Sink and Gasket
Separate M3 screws & Heat Sink & Gasket from Main BKT
Connector repair
This procedure includes HDMI, Display Port, headphone, USB-C, DC JACK and USB connectors.
The connectors are on the main board (board part number 790TA1300A03H01),
The connectors identifiers are as follows:

15
Connector
Location
HDMI Port
HDMI280, HDMI281
Display Port
DP250
Headphone
CN800
USB-A
P601, P602
USB-C
P600
DC jack
CN102
Connector location of Mainboard
Before repairing connectors, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 9.
Headphone connector CN800
Repair the Headphone connector:
1) Use a hot air gun to heat the bottom side of PCB below the headphone connector.

16
Remove headphone connector
2) Lift the CN800 connector from the circuit board.
3) Place the new component on the circuit board. Be sure that it matches the footprint.
4) Solder the new component.
HDMI connector HDMI280, HDMI281
Repair the HDMI connector:
1) Use a hot air gun to melt the solder on the pins. Pin solder with soldering iron and absorber. You can gently
push down with the soldering iron once everything is molten to move the HDMI280, HDMI281 out of the
through holes.
Remove HDMI connector
2) Lift the HDMI280, HDMI281 connector from the circuit board.
3) Place the new component on the circuit board. Be sure that it matches the footprint.
4) Solder the new component.
DP connector DP250
Repair the DP connector:
1) Use a hot air gun to melt the solder on the pins. Pin solder with soldering iron and absorber. You can gently
push down with the soldering iron once everything is molten to move the DP250 out of the through holes.