Maintenance and Service Guide
OMEN by HP 25 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: Mar 2021
Document Part Number: 916600-OMEN by
HP 25-MSG-V1
Assembly part number: 916600-001
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
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 ........................................................................................................................................................... 3
Features ................................................................................................................................................................. 3
Side and bottom components on the rear panel ..................................................................................................... 4
Stand components ................................................................................................................................................. 5
Locating the rating label ........................................................................................................................................ 6
3 Illustrated parts catalog .............................................................................................................................................. 7
How to order parts ................................................................................................................................................. 8
4 Removal and replacement procedures ........................................................................................................................ 9
Preparation for disassembly .................................................................................................................................. 9
RC ............................................................................................................................................................................ 9
Connector repair .................................................................................................................................................. 11
HDMI connector CN301, CN302 ................................................................................................................ 13
DP connector CN401 ................................................................................................................................. 14
DC jack connector CN801 .......................................................................................................................... 15
USB upstream connector CN701 .............................................................................................................. 15
USB connector CN702, CN703 .................................................................................................................. 15
Headphone connector CN101 ................................................................................................................... 16
Function test ........................................................................................................................................................ 16
Function test ........................................................................................................................................................ 16
Support and troubleshooting .............................................................................................................................. 17
Index ..................................................................................................................................................................... 19
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 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
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:
● 62.23 cm (24.5 in) diagonal viewable area with 1920 × 1080 resolution, plus full-screen support for
lower resolutions
● Tilt capability and easy viewing from sitting or standing position, or while moving from one side of the
monitor to the other
● TN technology providing wide viewing angles with colors that maintain their integrity
● HDMI (High-Definition Multimedia Interface) video input
● DisplayPort video input
● Security cable slot
● Audio headphone/variable line-out jack
● Convenient headphones storage hook on monitor stand
● Plug and Play capability if supported by your operating system
● On-screen display (OSD) adjustments in 10 languages for easy setup and screen optimization
● My Display software for adjusting monitor settings through Windows
● HDCP (High-bandwidth Digital Content Protection) used on digital inputs
● In select regions, software and documentation optical disc provided with the monitor that includes
monitor drivers and product documentation
● VESA mounting capability for attaching the display to a wall mount device or swing arm
● USB 3.0 hub with one upstream port and two downstream ports
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
Side and bottom components on the rear panel
To identify the components on the rear of the monitor, use this illustration and table.
Rear of monitor showing location of controls and connectors
Table 1-1: Front components and their descriptions
Component
Function
1
Power button
When the monitor is off, press the button to turn on
the monitor.
2
OK button
Press to open the OSD menu, select a menu item
from the OSD, or close the OSD menu. An indicator
is activated above the OK button when the OSD
menu is open.
3
Function buttons
Use these buttons to navigate through the OSD
menu based on the indicators above the buttons
that are activated when the OSD menu is open.
4
Security cable slot
Connects a security cable from the monitor to a
stationary object
5
USB 3.x (2) (downstream)
Connect optional USB devices to the monitor.
6
USB 3.x (upstream)
Connects the USB hub cable from the source device
to the monitor.
7
Power connector
Connects an AC adapter.
8
HDMI ports (2)
Connect the HDMI cables from source devices to the
monitor.
9
DisplayPort
Connects the DisplayPort cable from the source
device to the monitor.
10
Audio headphone/variable line-out jack
Connects optional powered stereo speakers,
headphones, earbuds, a headset, or a television
5
audio cable.
Stand components
To identify the components on the rear of the monitor, use this illustration and table.
Rear of the monitor showing of stand components
Table 1-2: Rear components and their descriptions
Component
Function
1
Stand release button
2 Headphone storage hook
Connects headphone
3
Cable management
6
Locating the rating label
The rating label on the monitor provides the product number and serial number. You may need these
numbers when contacting HP about the monitor model. The rating label is located on the bottom of the
display head.
Label location
For worldwide models (except India):
Barcode label
For worldwide models (except India):
Barcode label for Worldwide region
For India:
Barcode label for India region
Spec label
For worldwide region
Spec label for Worldwide region
7
3 Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
Mechanical explosion
Item
Description
Qty
1
FRONT BEZEL, OMEN by HP 25, HF
1
2
panel
1
3
SCREW, I, CROSS T, T3*5 ZN
4 4 SCREW, P, CROSS M3*6, ZN-CC
4
5
PCBA, IF/B, W/OSP, LP25Q3-71L/OMEN by HP
25
1
6
SCREW, I, CROSS, M4*6, BLK-Zn, HF
(NYLOK)&nbs
4
7
ASSY, CHASSIS, OMEN, HF
1 8 ASSY, STAND HINGE, OMEN, HF
1
9
REAR COVER, OMEN, HF
1
10
REAR VOODOO LOGO, OMEN, HF
4
11
REAR OMEN LOGO, OMEN, HF
1
12
ASSY, ARM OF STAND, OMEN, HF
4
13
ASSY, WALL MOUNT, OMEN, HF
1
14
CABLE MANAGEMENT OF ARM, OMEN, HF
1
15
ASSY, BASE OF STAND, OMEN, HF
1
16
KEY BUTTON, OMEN, HF
1
8
17
PCBA
1
18
PCBA
1
19
SCREW, I, CROSS, T2*3, Zn-Cc, ROHS
2
20
LENS, OMEN, HF
1
How to order parts
The HP authorized repair center can purchase the power board from HP.
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
Distributer part number
DisplayPort
CN401
Farnell
47272-0001
HDMI
CN301, CN302
Farnell
208658-1051
Headphone
CN101
Digi-Key
54-00177(Notes: the chassis
and rear cover need to be
modified to make the
connector opening larger)
USB upstream
CN701
Farnell
897-46-009-90-300000
USB A
CN702, CN703
Farnell
48405-0003
(Notes: the chassis and rear
cover need to be modified to
make the connector opening
larger)
DC jack
CN801
Digi-Key
PJ-096H
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.
9
4 Removal 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:
RC
Before removing the RC, follow these steps:
▲ Prepare the monitor for disassembly. See Preparation for disassembly on page 9.
Remove the RC:
10
1) Use hand and a tool to separate back cover assy from monitor as below picture，but pay attention to
avoid the LVDS cable and Lightbar cable.
Monitor separate step
2) Unlock 4 screws and pull out the Audio board and Keypad cable then separated the chassis assy form the
back cover assy.
PCBA and rear cover separate step
3) Unlock 2 screws fixed Keypad and Bucket then the keypad is separated.
11
KP board separate step
4) Pull out all cables except the LVDS and unlock 4 screws fixed Main board and chassis then separate th
PCBA and chassis separate step
5) Unlock 4 screws fixed the hinge and chassis ,take out the small mylar then separate the hinge.
Chassis screw separate step
Connector repair
This procedure includes HDMI, DisplayPort, DC jack, headphone, USB upstream and USB connectors.
12
The connectors are on the main board (board part number 790N41300***H01) and USB side board (board part
number 790N40300***H0*).
The connectors’ identifiers are as follows:
Connector
Location
HDMI
CN301,CN302
DisplayPort
CN401
USB upstream
CN701
USB
CN702,CN703
DC jack
CN801
Connector location showing of main board
Connector
Location
Headphone
CN101
13
Audio Jack location of audio board
Connector location showing of USB side board
Before repairing connectors, follow these steps:
▲ Prepare the monitor for disassembly. See Preparation for disassembly on page 9.
HDMI connector CN301, CN302
Repair the HDMI connector:
1) Use a soldering iron and a desoldering pump to remove as much solder as possible from the pin.
14
HDMI connector repairing
2) Use a hot air gun to melt the solder on the pins.
HDMI connector repairing
3) Lift the CN301, CN302 connector from the PCB.
4) Place the new component on the PCB. Be sure that it matches the PCB footprint.
5) Solder the new component.
DP connector CN401
Repair the DP connector:
1) Use a soldering iron and a desoldering pump to remove as much solder as possible from the pin.
DP connector repairing
2) Use a hot air gun to melt the solder on the pins.
DP connector repairing
3) Lift the CN401 connector from the PCB.
15
4) Place the new component on the PCB. Be sure that it matches the PCB footprint.
5) Solder the new component.
DC jack connector CN801
Repair the DC jack 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 CN201 out of the through holes.
DC Jack connector repairing
2) Lift the CN801 connector from the PCB.
3) Place the new component on the PCB. Be sure that it matches the PCB footprint.
4) Solder the new component.
USB upstream connector CN701
Repair the USB upstream 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 CN602 out of the through holes.
USB upstream connector repairing
2) Lift the CN701 connector from the PCB.
3) Place the new component on the PCB. Be sure that it matches the PCB footprint.
4) Solder the new component.
USB connector CN702, CN703
Repair the USB 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 P101, P102 out of the through
holes.
16
USB connector repairing
2) Lift the CN702, CN703 connector from the PCB.
3) Place the new component on the PCB. Be sure that it matches the PCB footprint.
4) Solder the new component.
Headphone connector CN101
Repair the Headphone connector:
1) Use a hot air gun to heat the bottom side of PCB below the headphone connector.
Headphone connector repairing
2) Lift the CN101 connector from the PCB.
3) Place the new component on the PCB. Be sure that it matches the PCB footprint.
4) Solder the new component
Function test
After repair, be sure to confirm that all functions are working.
Table 4-1: Function test
Test item
Operating description
Tool used
HDMI test
Confirm whether image displays and sound plays
correctly on the monitor.
Computer or DVD player
DP test
Confirm whether image displays and sound plays
correctly on the monitor.
Computer or DVD player
Audio test
Change volume and balance to confirm whether
volume is smooth and loud enough.
Speaker
17
Support and troubleshooting
The following table lists possible problems, the possible cause or each problem, and the recommended
solutions.
USB test
Confirm whether transmitting data between
computer and USB devices.
Computer and USB devices
Table 4-2: Solving common problems
Problem
Possible cause
Solution
Screen is blank or
video is flashing.
Power cord is disconnected.
Connect the power cord.
Monitor is off.
Power the power button.
NOTE: If pressing the Power
button has no effect, press
and hold the power button
for 10 seconds to disable the
Power button lockout
feature.
Video cable is improperly connected.
Connect the video cable
properly.
System is in Sleep mode.
Press any key on the
keyboard or move the
mouse to exit Sleep mode.
Video card is incompatible.
Open the OSD menu and
select the Input Control
menu. Set Auto-Switch Input
to Off and manually select
the input
Image appears
blurred,
indistinct, or too
dark.
Brightness is too low.
Open the OSD menu and
select Brightness to adjust
the brightness scale as
needed.
Check Video Cable
is displayed on
screen.
Monitor video cable is disconnected.
Connect the appropriate
video signal cable between
the computer and monitor.
Be sure that the computer
power is off while you
connect the video cable.
Input Signal Out
of Range is
displayed on
screen.
Video resolution and/or refresh rate are set higher
than what the monitor supports.
Change the settings to a
supported setting.
The monitor is
The monitor’s power saving control is disabled.
Open the OSD menu and
18
off, but it did not
seem to enter
into Sleep mode.
select Power Control > AutoSleep Mode and set autosleep to On.
On-Screen Menus
are Locked is
displayed.
The monitor’s OSD lock function is enabled.
Press and hold the Menu
button on the front bezel to
10 seconds to disable the
OSD lockout function.
Power Button is
Locked is
Displayed
The monitor’s power button is locked.
Press and hold the power
button for 10 seconds to
disable the power button
lock function.
19
Index
components
front, 5
rear, 6
connector repair, 17
DisplayPort connector location, 6
features, 4
firmware updates, 2
front components, 5
function button locations, 5
function test, 20
HDMI connector location, 6
how to order parts, 10
illustrated parts catalog, 9
menu button location, 5
parts, 9
parts, ordering, 10
power board removal, 15
power button location, 5
power connector location, 6
power light location, 5
precautions, 1
preparation for disassembly, 12
RC removal, 12
rear components, 6
removal
power board, 15
RC, 12
xxxx, 20
removal and replacement procedures, 12
returning to customer, 2
RoHS (2002/95/EC) requirements, 2
safety information, 1
serial number location, 7
service information, 1
spare parts, 9
support and troubleshooting, 21
troubleshooting, 21
USB port location, 6
USB upstream port location, 6
VGA connector location, 6
xxxx removal, 20
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