HP M27 Manual

Maintenance and Service Guide
M27 Webcam and M24 Webcam 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 Statesand other
countries.
The information contained herein is subject to
change without notice. The only warranties for
HP products and services are set forth inthe
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: Jan. 2022
Document Part Number: M73401-M27
Webcam-MSG-V1
Assembly part number:
M24 Webcam - M73398-001
M27 Webcam - M73401-001
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 d escriptions ...................................................................................................................................................................2
Firmware updates........................................................................................................................................................................2
Before returning the repaired product to the customer .........................................................................................................2
2. Monitor features.................................................................................................................................................................................4
Features ........................................................................................................................................................................................4
Front components.......................................................................................................................................................................5
Rear components ........................................................................................................................................................................6
Locating the serial number and product number ....................................................................................................................7
3. Illustrated parts catalog .......................................................................................................................................................................9
How to order parts ...................................................................................................................................................................10
4. Removal and replacement procedures...........................................................................................................................................12
Preparation for disassembly .....................................................................................................................................................12
Rear cover ..................................................................................................................................................................................12
Power board ..............................................................................................................................................................................16
Connector repair .......................................................................................................................................................................17
USB 3.0 TY PE A CN1101 CN1102.......................................................................................................................................19
Repair the usb connector: ........................................................................................................................................................19
PHONE JACK CN601............................................................................................................................................................19
HDMI connector CN501 ...........................................................................................................................................19
DP connector CN502..................................................................................................................................................20
Function test..............................................................................................................................................................................21
Table 4-1: Function test ...........................................................................................................................................................21
Support and troubleshooting ...................................................................................................................................................21

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 trainedservice personnel whoare familiar with this HPproduct should perform service or
maintenancefor 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

3
product before returning it to the customer.

4
2. Monitor features
This chapter provides an overview of the monitor’s features.
Features
60.5 cm (23.8 in) diagonal viewable screen area with 1920 × 1080 @ 60 Hz resolution, plus full screen
support for lower resolutions; includes custom scaling for maximum image size while preserving original aspect ratio
68.6cm (27inch) diagonal viewable screen area with 1920 × 1080 @ 60 hz resolution, plus full screen
support for lower resolutions includes custom scaling for maximum image size while preserving original aspect ratio
Wide color gamut to provide coverage of NTSC 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 for 23.8” and 27" monitor
Landscape orientation only for 23.8” and 27” monitor
Menu button and four on screen display (OSD) buttons, three that you can reconfigure to quickly allow
selection of the most commonly used operations
Onscreen display (OSD) adjustments in several languages for easy setup and screen optimization
Embedded 2w SPK per side in monitor
Slide cover camera and microphone for online collaboration
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.

5
Front components
To identify the components on the front of the monitor, use this illustration and table.
Press the power button on the bottom of the monitor to turn it on.

6
Rear components
To identify the components on the rear of the monitor, use this illustration and table.
Table 1-1: Rear components and their descriptions
Component
Function
1
Power connector
Connects an power cord..
2
DisplayPort IN port
Connects a DisplayPort cable from the source
device to the monitor
3
HDMI Port
Connects an HDMI cable from the source
device to the monitor
4
USB Type C
Connects a USB TypeC
cable from the source device to the monitor.
Serves as a single connection when docking an
HP notebook.
5.
USB ports (2)
Connects a USB device, provides high speed
data transfer, and charges small devices

7
such as a smartphone, even when the
computer is off with OSD Performance mode
on
6
Audio out
(headphone)
Connects optional powered stereo speakers,
headphones, earbuds, a headset, or
a television audio cable.
7
Menu button
Press to open the OSD menu.
8
OSD buttons
When the OSD menu is open, press the buttons
to navigate through the menu.
9
Power button
Turns the monitor on or off.
10
Security cable slot
Connects an optional security cable.
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 when contacting HP about the
monitor.
For worldwide models (except India):
Barcode label and spec label

8
For India:

9
3. Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
item
part name
q'ty
1
Deco bezel
1
2
lens
1
3
Led board
1
4
PANEL
1
5
MIDDLE FRAME
1
6
speaker
2
7
Power mylar
1
8
Power board
1
9
MAINFRAME
1
10
Key board
1
11
Key-lock plate
1
12
Rear cover
1
13
column
1
14
Base
1
15
scalarBOARD
1
16
sensor BOARD
1
17
Bkt-webcam
1
18
Webcam board
1
19
Webcam rubber
2

10
How to order parts
The HP authorized repair center can purchase the adaptor from HP.
Power board
Description
HP spare part number
Manufacturer part number
M24 Webcam
N12399-001
PLPCLE454GFBZ
M27 Webcam
N12400-001
PLPCLH471GFA1
N12400-002
PLPCLH651BFB2
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/
Connectors by manufacturer
Component
description
Location identifier
Componentdistributor
Distributerpart
number
CONN PHONE JACK
CN601
DK
839-54-00175TR-ND
839-54-00175CT-ND
839-54-00175DKR-ND
（54-00175）
HDMI
CN501
DK
1-1747981-1
DP
CN502
DK
670-2430-ND/JAE
USB 3.0 TYPE A
CN1101,CN1102
DK
732-3146-2-ND
732-3146-1-ND /WE
USB Type-C
CN5102
DK
670-2846-2-ND
670-2846-1-ND
670-2846-6-ND/JAE
NOTE: Rearcover and chassis need to be modified to hold connector. Connector may need modifications to
20
Cover Webcam
1
21
lens Webcam
1
S1
SCREW M3 X4
14
S2
SCREW Q4 X4
5
S3
SCREW M3 X6
6
S4
SCREW M4 X6
1
S5
SCREW M4 X10
4

11
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.
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/

12
4. Removal and replacement procedures
Adherence to these procedures and precautions is essential for proper service.
Preparation for disassembly
1. Use this information to properly prepare to disassemble and reassemble the monitor.
2. Read the “Important safety information” and “Important service information and precautions” sections in
the“Getting started” chapter of this guide.
3. Clean the room for disassembly.
4. Identify the disassembly area.
5. 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.
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 12.

13
Remove the Rear cover:
Step
Figure
Description
Remove the
HINGE ASS'Y
Remove the
hinge assy by
push the
hook up
Remove the rear
cover
Remove the
rear cover
screws by the
screwdriver.
Remove the
rear cover
from the top
side by
scraper
disconnect

14
the
connectors of
keyboard
. Disconnect
the
connectors of
camera board
and remove
the tapes

15
Remove the boards
Turn over the
mainframe
and remove
the mylar
Remove the
mainboard
and power
board screws
by the
screwdriver.
Mainboard and
power board

16
Remove the middle
frame
Remove the
screws by the
screwdriver
PANEL
Power board
The power board part number is PLPCLH471GFA1 .
Before removing the power board, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 12.
Remove the power board:
1) The HP M27 power board connector position is as follows: