HP X27c Manual

Maintenance and Service Guide
X27c 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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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: M45867-X27c-
MSG-V1
Assembly part number: M45867-001
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
1 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
2 Monitor features............................................................................................................................................4
Features..................................................................................................................................................4
Front components...................................................................................................................................5
Rear components....................................................................................................................................6
Locating the serial number and product number....................................................................................7
3 Illustrated parts catalog.................................................................................................................................8
How to order parts ..................................................................................................................................9
4 Removal and replacement procedures.......................................................................................................11
Preparation for disassembly.................................................................................................................11
Rear Cover............................................................................................................................................11
Power board..........................................................................................................................................14
Connector repair...................................................................................................................................15
HDMI connector CN501.............................................................................................................16
DP connector CN551.................................................................................................................16
Audio Connector CN601............................................................................................................17
Function test .........................................................................................................................................18
Support and troubleshooting.................................................................................................................18
Index.....................................................................................................................................................20

2
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, personnelmust 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.
●If you must replace a capacitor, insert new parts carefully to avoid a short circuit caused by the

3
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.

4
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:
●68,6 cm(27in) curved 1500mm radius with 2560x1440 resolution, ultra-wide backlit display,
plus full-screen support for lower resolutions
●Antiglare panel with an LEDbacklight
●Wide viewing angle to allow viewing from a sitting or standing position, or moving from side to
side
●Tilt adjustment capability
●Height adjustment capability
●DisplayPort (DP) video input
●High-Definition MultimediaInterface(HDMI) video input (cable provided)
●Audio-out (headphone)jack
●Plug and Play capability,ifsupported byyouroperatingsystem
●Security cable slot provision onrearof monitor for optional securitycable
●On-screen display (OSD) adjustments in several languages for easy setupandscreen optimization
●High-bandwidth Digital Content Protection (HDCP) copy protection on all digital inputs
●VESA mountingbracket for attaching the monitor to a wall-mount device or swing arm
●Low blue light modesettings to create a more relaxing and less stimulating image
●Energysaver feature to meetrequirements for reduced power consumption
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.
Table 1-1: Front components and their descriptions
Component
Function
1
Menu/OK
If the OSD menu is open, press to confirm
selection.
If the OSD menu is closed, press to open the
OSD menu.
2
Next Active
Input/Up/Increase
button
If the OSD menu is close, switches the
monitor’s input source to the next active input.
If the OSD menu is close, press to open the
information menu at HDMI, or to perform auto
adjustment at VGA.*
3
Color Modes/Down/Decre
ase button
If the OSD menu is close, opens the Color
menu where you can adjust the monitor screen
to a comfortable
If the OSD menu is open, press to navigate
forward through the OSD menu and decrease
adjustment levels.
4
Brightness+
Input/Exit/Back
button
If the OSD menu is close, opens the
Brightness+ adjustment scale.
If the OSD menu is closed, press to switch to
the next video input port.*
5
Power button
Turns the monitor on or off.

6
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
Power connector
Connects the power cord
2
HDMI port
Connects an HDMI cable from the monitor to a
source device such as a computer.
3
DisplayPort in connector
Connects the DisplayPort cable from the
monitor to a source device such as a
computer.
4
Headphone jack
Connect the headphone to the monitor.

7
Locating the serial number and product number
The SPEC label is 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.
For worldwide models (except India):
Spec label

8
3 Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
1
2
3
4
9
10
11
S1
S7
S6
5
67
8
12
13
S2
S3
S5
S4
Item
Description
Qty
1
DECO_BEZEL L27WR-Dblc1hp-p12
1
2
LENS_POWER
1
3
PANEL
1
4
MIDDLE_FRAME L27WR-Dblc1hp-p12
1
5
INSULATING SHEET 34.1*17
1
6
POWER BOARD
1
7
MAIN BOARD
1
8
MAINFRAME
1
9
KEY BOARD
1
10
LED BOARD
1
11
REAR_COVER
1
12
stand ass'y NA NA
1
13
BASE_ASS’Y NA NA
1
S1
0M1G3030 4120
9
S2
0D1G1030 6120
4

9
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
PSU X27c 1st source
M84744-001
PLPCKH362UQA1
PSU X27c 2nd source
M84744-002
PLPCKH362UQA2
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:Digikey Electronics
Capacitors by distributor
Component
description
Location
Component
distributor
Distributor part number
EC 680uF 20% 35V
12.5*20 3000 hr 2A
PY1V
C905/C906
Digi-Key
EGPA350ELL681MK20S
EC 470uF 20% 25V
10x12 5000 hr 1.6A
ENB1
C9905
RS
EEUFR1E471
Connectors by manufacturer
Component
description
Location
identifier
Component
distributor
Distributer part number
HDMI
CN501
RS
SD-47151-001
(Molex)
DP
CN551
Farnell
DP1RD20JQ3
(JAE)
AUDIO
CN601
RS
913-1021
(RS PRO)
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.
You can purchase cables from the HP part store at https://partsurfer.hp.com/Search.aspx.
Internal and External Power Supplies are available for purchase from the following EU distributor: EET
S3
QM1G38400601200ARA
1
S4
0D1G1030 6120
2
S5
0M1G3030 4120
2
S6
0Q1G 930 5120
1
S7
0M1G2940 10 47 CR3
4

10
https://www.eetgroup.com/en-eu/
NOTE: HP continually improves and changes product parts. For complete and current information
about supported parts for your product, go to https://partsurfer.hp.com/Search.aspx, select your
country or region, and then follow the on-screen instructions.

11
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 11.
Remove the Rear Cover:

12
1) Remove four screw from the rear case.
2) Use your fingers to split the left and right sides apart between the middle frame and rear case.
3) Insert the scraper bar tool into the gap between the middle frame and rear case, and then rotate.
The hook opens. Repeat the steps.
4) Disassemble Rear Cover.
5) Remove the key board wire from the Interface-board.

13
6) Disassemble the Key board and LED board from the Rear Cover (if required).
7) Tear off the tapes.
8) Remove 2 screws from the main frame.
9) Remove 2 screws from bracket
10) Disassemble 5 screws from the board.
11) Disassemble all the boards from housing.

14
12) Disconnect all the wires from the board.
Power board
The power board part number is PLPCKH362UQA1 (1st source) or
PLPCKH362UQA2 (2nd source).
Before removing the power board, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 11.
Remove the power board:
1) The HP X27c power board connector position is as follows:
2) Locate the part number location on the board
Warning: After unplugging the
power supply, the capacitance
is still charged, do not touch
and discharge the capacitor.

15
Connector repair
This procedure includes HDMI, DisplayPort and Audio connectors.
The connectors are on the main board (board part number CBPC1A8HPQ1)
The connectors’ identifiers are as follows:
Connector
Location
HDMI
CN501
DisplayPort 1
CN551
Audio
CN601
Before repairing connectors, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 11.
IMPORTANT:
• Repair Condition: Connector repair is only for out of warranty.
• Repairing must operate by professional repairers (Note) in repair center, not applicable for end
user.
• Electrostatic protection is required when component replacement is required.
• The monitor meets ROHS, please use Lead-free solder wire for soldering.
• If Connector need to replace, must check specification and part number whether match the BOM
and location.
• If connector need to replace, please insert new parts carefully because the near pin may cause
short circuit by inappropriate operate.
• DO NOT allow any liquid on the board. Water and moisture may cause short-circuit to the
electronic components and lead to malfunctions.
• The fusion point of Lead-Free solder is requested. Repairing with conventional lead wire may
cause damage.
• Work quickly to avoid overheating the circuit board as soon as you confirm the steady soldering
CN501
CN551
CN601
MAIN BOARD

16
condition.
• Keep the soldering iron tip clean and well tinned and when replacing parts.
• A close inspection of the circuit board revealed look in good condition.
•After repaired, must connect source to each port to check Main board function is ordinary.
Note: (The requirement of professional repairers’ regulation by ERP lot5)
1) The professional repairer has the technical competence to repair electronic displays and complies
with the applicable regulations for repairers of electrical equipment in the Member States where it
operates. Reference to an official registration system as professional repairer, where such system
exists in the Member States concerned, shall be accepted as proof of compliance with this point.
2) The professional repairer is covered by insurance covering liabilities resulting from its activity,
regardless of whether this is required by the Member State.
HDMI connector CN501
Repair the HDMI connector:
1) Use a soldering iron and a de-soldering pump to remove as much solder as possible from the pin.
2) Use a hot air gun to melt the solder on the pins.
3) Lift the CN501 connector from the circuit board.
4) Place the new component on the circuit board. Be sure that it matches the footprint.
5) Solder the new component.
DP connector CN551
Repair the DP connector:
1) Use a soldering iron and a de-soldering pump to remove as much solder as possible from the pin.

17
2) Use a hot air gun to melt the solder on the pins.
3) Lift the CN551 connector from the circuit board.
4) Place the new component on the circuit board. Be sure that it matches the footprint.
5) Solder the new component.
Audio Connector CN601
Repair the DP connector:
1) Use a soldering iron and a de-soldering pump to remove as much solder as possible from the pin.
2) Use a hot air gun to melt the solder on the pins.
3) Lift the CN601 connector from the circuit board.
4) Place the new component on the circuit board. Be sure that it matches the footprint.
5) Solder the new component.

18
Function test
After repair, be sure to confirm that all functions are working.
Support and troubleshooting
The following table lists possible problems, the possible cause or each problem, and the recommended
solutions.
Function test
After repair, be sure to confirm that all functions are working.
Table 4-1: Function test
Te
st 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
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
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 Auto-Sleep Mode.
Press any key on the
keyboard or move the
mouse to inactivate the
screen blanking utility.
Video card is incompatible.
Open the OSD menu and
select the Input menu. Set
Auto-Switch Input to Off
and manually select the
input or replace the video
card or connect the video
cable to one of the
computer’s on-board video
sources.
Image appears
Brightness is too low.
Open the OSD menu and