HP X34 Manual

Maintenance and Service Guide
X34 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.
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Devices, Inc. Bluetooth is a trademark owned
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license. NVIDIA is a trademark and/or
registered trademark of NVIDIA Corporation
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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: June. 2022
Document Part Number: M42010-X34-MSG-
V1
Assembly part number: M42010-001
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”.

1
Table of Contents
Getting 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
1. Monitor features........................................................................................................................................................................................5
Features ...............................................................................................................................................................................................................5
Front components.............................................................................................................................................................................................6
Rear components...............................................................................................................................................................................................7
Locating the serial number and product number ........................................................................................................................................8
3. Illustrated parts catalog............................................................................................................................................................................10
How to order parts..........................................................................................................................................................................................11
4. Removal and replacement procedures ................................................................................................................................................13
Preparation for disassembly...........................................................................................................................................................................13
Rear cover .........................................................................................................................................................................................................13
Power board .....................................................................................................................................................................................................17
Connector repair..............................................................................................................................................................................................19
Audio connector M1 .........................................................................................................................................................................20
HDMI connector J2 ..........................................................................................................................................................................20
DP connector J3.................................................................................................................................................................................21
Function test.....................................................................................................................................................................................................22
Table 4-1: Function test .................................................................................................................................................................................22
Support and troubleshooting ........................................................................................................................................................................23

2
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.

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●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.

4
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.

5
1. Monitor features
This chapter provides an overview of the monitor’s features.
Features
Depending on the model, your monitor might include the following features:
86.7 cm (34 in) diagonal viewable screen area with 3440 ×1440 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)Swivel and height
adjustment capabilities
Wide color gamut to provide coverage of s RGB color spaces
Non-glare panel with an LED backlight
Wide viewing angle to allow viewing from a sitting or standing position, or moving from side to side
Tilt and height adjustment capabilities
Pivot capability to rotate the monitor head from landscape to portrait orientation (select products
only
Four on-screen display (OSD) buttons, three that you can reconfigure to quickly allow selection of
the most commonly used operations
On-screen display (OSD) adjustments in several languages for easy setup and screen optimization
Color space presets for Gaming
Energy saver feature to meet requirements for reduced power consumption
Security cable slot on the rear of the monitor for an optional security cable
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.

6
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
Function
1
Menu button
Press to open the OSD menu. When the OSD
menu is open, the Menu light turns on.
2
OSD buttons
When the OSD menu is open, press the buttons
to navigate through the menu. The function light
icons indicate the default button functions.
3
Power button
Turns the monitor on or off.

7
Rear components
To identify the components on the rear of the monitor, use this illustration and table.
Table 1-2: Rear components and their descriptions
Component
Function
1
OSD buttons
2
Power button
Turns the monitor on or off
3
Power connector
Connects an AC adapter
4
HDMI port
Connects the HDMI cable to a source device
such as a computer or game console.
5.
Display Port connector
Connects the Display Port cable to a source
device such as a computer or game console
6
Audio-out (headphone jack)
7
Security cable slot
Connects an optional security cable.

8
Locating the serial number and product number
Depending on the product, the serial number and product number are located on a label on the rear of
the monitor or on a label under the front bezel of the monitor head. You might need these numbers
contacting HP for support.
For worldwide models (except India):
Barcode label and spec label

9
For India:

10
3. Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
item
part name
q'ty
1
DECO
1
2
LENS
1
3
MIDDLE FRAME
1
4
MYLAR
1
5
POWER BOARD
1
6
KEY BOARD
1
7
LED BOARD
8
BASE
1
9
STAND
1
10
REAR COVER
1
11
MAINFRAME
1
12
SCALER BOARD
1
13
CONVERTER BOARD
1
14
PANEL
1
S1
SCREW M3
15
S2
SCREW M3
7
S3
SCREW M4
1
S4
SCREW M4
4

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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
X34
M84750-001
ADPCK1908FGB
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)
DK : https://www.digikey.com/
Capacitors by distributor
Component
description
Location
Component
distributor
Distributor part
number
470uF 20% 25V
10*12 3000 hr
1600mA P5.0 lace
C9135,C9136,C9137,C9138,C91
39,
C9141
RS
25ZL470MEFC10X1
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Connectors by manufacturer
Component
description
Location identifier
Component distributor
Distributer part
number
HDMI
J2
RS
1-1747981-1
Display Port
J3
DK
670-2430-ND/JAE
Audio
M1
RS
913-1021
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.

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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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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:
Rear cover
Before removing the rear cover, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 13.

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Remove the rear cover:
Step
Figure
Description
Remove the
HINGE ASS'Y
Put the
monitor face
down on a
matched
cushion
Remove the
hinge assy by
push the
hook up
Remove the
REAR_COVER
Remove the
rear cover
screws by the
screwdriver.
Remove the rear
cove
Remove the
rear cover
from the top
side by hand
disconnect
the
connectors
and tapes and
aluminum foil.

15
Remove the
mainframe
Remove the
mainframe
screws ,

16
Remove the mylar
Tear out all
tapes
Remove the boards
Remove the
screws by the
screwdriver
Power board and
mainboard and
converter board

17
Remove the
middle frame
Remove the
screws by the
screwdriver
panel
Power board
The power board part number is ADPCK1908FGB
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 X34 power board connector position is as follows:

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2) Locate the part number location on the board.
Warning : after unpluging the
power supply, the capacitance is
still chagred, do not touch and
discharge the capacitor