HP M24FD Manual

Maintenance and Service Guide
M24fd model
M75605
M27fd model
M31383
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.
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: June 2022
Document Part Number:
M75605-M24fd -MSG-V1
Assembly part number:
M75605-001
M31383-001
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 components .................................................................................................................................................. 4
Rear components ................................................................................................................................................... 5
Locating the serial number and product number .................................................................................................. 6
3Illustrated parts catalog .............................................................................................................................................. 7
How to order parts ............................................................................................................................................... 11
4Removal and replacement procedures ...................................................................................................................... 12
Preparation for disassembly................................................................................................................................ 12
Rear Cover ............................................................................................................................................................ 12
Connector repair .................................................................................................................................................. 18
HDMI connector P200/P300 ..................................................................................................................... 20
VGA connector P100 ................................................................................................................................. 20
Type C connector UP100........................................................................................................................... 20
USB Type A connector UP2/UP3 ............................................................................................................... 21
Function test ........................................................................................................................................................ 21
Support and troubleshooting .............................................................................................................................. 21
Index..................................................................................................................................................................... 23

1
1Getting started
Read this chapter to learn about safety information and where to find additional HP resourcs.
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 sources 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

2
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:
●60.5 (23.8 in) diagonal viewable screen area with 1920 × 1080 FHD plus full-screen support for lower
resolutions; includes custom scaling for maximum image size while preserving original aspect ratio
●68.6 cm (27.0 in) diagonal viewable screen area with 1920 × 1080 FHD 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)
●Wide color gamut to provide coverage of sRGB color spaces
●Nonglare panel with an LED backlight
●Wide viewing angle to allow viewing from a sitting or standing position, or moving from side to side
●Tilt adjustment capability
●High–Definition Multimedia Interface (HDMI), USB and USB Type-C port, and VGA video inputs
●Four on-screen display (OSD) buttons, three that you can reconfigure to quickly allow selection of the
most commonly used operations
●Plug and Play capability if supported by your operating system
●Security cable slot on the rear of the monitor for an optional security cable
●On-screen display (OSD) adjustments in several languages for easy setup and screen optimization
●HP Display Assistant software for adjusting monitor settings and enabling theft deterrence features
●Energy saver feature to meet requirements 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.

4
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, select a menu item
from the OSD, or close the OSD menu. When the
OSD menu is open, the Menu light turns on.
2 OSD buttons
(assignable)
When the OSD menu is open, press the buttons to
navigate through the menu. The function light icons
indicate the default button functions. For a
description of these functions, see Using the
function buttons on page 15.
You can reassign the function buttons to quickly
select the most commonly used operations. See
Reassigning the function buttons on page 16.
3 Function buttons Turns the monitor on or off.
4 Power button White: The monitor is on.
Amber: Monitor is in a reduced power state because
of inactivity. See Using Auto-Sleep Mode on page 16
for more information.

5
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 Security cable slot Connects an optional security cable.
2 Power connector Connects an AC adapter.
3 USB ports (2) Connect USB devices.
4 USB Type-C port Connects a USB Type-C cable to a source
device such as a computer or game console. This
USB Type-C port can function as a DisplayPort
audio/video input or as a USB 3.0 connection. It
can also be used to deliver up to 65 W of power to
a device. Power outputs are 9 V/10 V/12 V/15 V/20
V to achieve a 65 W output.
This port also enables the USB Type-A ports to
perform their functions.
5 VGA port Connects a VGA cable to a sourc device such as a
computer or game console.
6 HDMI port Connects the HDMI cable to a source device such as
a computer or game console.

6
Locating the serial number and product number
The SPEC label (1) and BaRear Coverode 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.
For worldwide models (except India):
Barcode label
Spec label
For India:
Bar code label
Spec label

7
3Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
M24fd
Item Description Qty
1 23.8 LCM for Encore III 1
2 WH A1007H00-6P-2L/A1251-H06 #28 75mm+ACETATE W/B HF 1
3 WH FFC 30P(1.0mm)180mm(1FOLD+PRO)60V G/F
W/CONN(A15+BC)+AL HF 1
4 WH FFC 8P(0.5mm)270mm(3FOLD)60V G/F (A8+A6) HF 1
5 REAR SUPPORT-L(PCR-85% ABS+5% PET/JACK BLACK (6009-
0337))(ENCORE 3-M24fd) 1
6 REAR SUPPORT-R(PCR-85% ABS+5% PET/JACK BLACK
(6009-0337))(ENCORE 3-M24fd) 1
7 MAC. SCREW-MI M3.0*4.0L, BLK-Ni 20
8 MAIN BD outer preelaboration for HP M24fd Lehui (LM238WF2-
HSAK2)
1
9 SHIELDING (SECC 0.5T)(1A2H-AUDIO)(ENCORE3) 1
10 MAC. SCREW-MH #4-40*5.0L,Ni 2
11 REAR COVER(PCR-85%+5% PET/JACK BLACK (6009-
0337))(ENCORE 3-M24fd) ASS'Y 1
11-1 REAR COVER(PCR-85%+5% PET/JACK BLACK (6009-
0337))(ENCORE 3-M24fd) ASS'Y 1
11-2 DISPLAY BD ASS'Y HP Encore III TOP 1

8
11-3 DISPLAYKEY(ABS 85% PCR +5% OBP/JACK BLACK (6009-
0337))(ENCORE 3) 1
11-4 SPONGE PU(15*12*13t)(BLK) 1
11-5 SPONGE PU(80*3.0*8.0T)(BLK) 2
12 MAC. SCREW-MI M3.0*6.0L, BLK-ZNNI(HEAD DIAMETER 7.0) 2
13 HINGE(ENCORE3-M24f)(Sliver) GT 1
14 NECK(ENCORE3-M27f)(Sliver) ASS'Y GT 1
15 BASE(ENCORE3-M24f)(Sliver) GT 1
16 FRONT DECO( ABS 85% PCR +5% OBP/NATURAL
SILVER)(ENCORE 3-M24FD)ASS'Y 1
16-1 FRONT DECO(VIRGIN ABS 85% PCR +5% OBP/NATURAL
SILVER)(ENCORE 3-M24FD) 1
16-2 LENS(PC122/TRANSPARENT)(ENCORE 3) 1
16-3 FOAM TAPE (L534*W3*0.6t EXP060-D33-S) 1

9
To identify the monitor major components, use this illustration and table.
M27fd
Item Description Qty
1 LM270WF7-HSAK2 Encore III M27fd LCM P/N(Black) 1
2 WH A1007H00-6P-2L/A1251-H06 #28 50mm W/B HF 1
3 WH FFC 30P(1.0mm)180mm(1FOLD+PRO)60V G/F
W/CONN(A15+BC)+AL HF 1
4 WH FFC 8P(0.5mm) 350mm(3FOLD)60V G/F (A8+A6) HF 1
5 REAR SUPPORT-L(PCR-85% ABS+5% PET/JACK BLACK (6009-
0337))(ENCORE 3-M27F) 1
6 REAR SUPPORT-R(PCR-85% ABS+5% PET/JACK BLACK
(6009-0337))(ENCORE 3-M27F) 1
7 MAC. SCREW-MI M3.0*4.0L, BLK-Ni 13
8 MYLAR BLACK(220*43*0.325t) (ENCORE 3-M27FD) 1
9 MAIN BD ASS'Y HP Encore III M27fd (LM270WF7-HSAK2) TOP 1
10 SHIELDING (SECC 0.5T)(1A2H-AUDIO)(ENCORE3) 1
11 MYLAR BLACK(16.5*15*0.325t) (ENCORE 3-SHIELDING
MIDDLE SCREW) 1
12 MAC. SCREW-MH #4-40*5.0L,Ni 2
13 REAR COVER(VIRGIN ABS+5% PET/JACK BLACK (6009-
0337))(ENCORE 3-M27FD)ASS'Y 1
13-1 REAR COVER(VIRGIN ABS+5% PET/JACK BLACK (6009-
0337))(ENCORE 3-M27FD) 1
13-2 DISPLAY BD ASS'Y HP Encore III TOP 1
13-3 DISPLAYKEY(VIRGIN ABS+5% PET/JACK BLACK (6009-
0337))(ENCORE 3) 1
13-4 SPONGE PU(24.0*12.0*16.0t)(ENCORE2_23F)(BLK) 1

10
14 MAC. SCREW-MI M3.0*6.0L, BLK-ZNNI(HEAD DIAMETER 7.0) 2
15 HINGE(ENCORE3-M27f)(Sliver) CX 1
16 NECK(ENCORE3-M27f)(Sliver) ASS'Y CX 1
17 BASE(ENCORE3-M27f)(Sliver) CX 1
18 FRONT DECO(VIRGIN ABS+5% PET/NATURAL
SILVER)(ENCORE 3-M27FD)ASS'Y 1
18-1 FRONT DECO(VIRGIN ABS+5% PET/NATURAL
SILVER)(ENCORE 3-M27FD) 1
18-2 LENS(PC122/TRANSPARENT)(ENCORE 3) 1
18-3 FOAM TAPE (L606*W3*0.6t EXP060-D33-S) 1

11
How to order parts
The HP authorized repair center can puRear Coverhase the power board from HP.
Connectors by manufacturer
Digi-Key Component: Digi-Key Component United Kingdom
Type LHD P/N Main Source SPEC
DigikeyDistributer P/N Different than
Main Source
USB CONN. 3.0 A R030062100080
USB CONN. 3.0 A TYPE
180' H=14.45mm BLACK
(U3A27C-09BM5YN24)
HF
USB1086-GF-B Color Different. Digikey is blue.
LHD IS BLK
USB CONN. 3.0 A R030062100130
USB CONN. 3.0 A TYPE
180' H=14.45mm BLACK
(W-US48409-0A10B-
Z)HF
USB1086-GF-B Color different. Digikey is blue.
LHD IS BLK
USB CONN. 3.1 C R030062500080 USB CONN. 3.1 C TYPE 180' H=12mm (050-
4G2090-040H) HF 12401951E412A N/A
CONN. HDMI 19P R030410000210 CONN. HDMI 19P 180' H=13mm HDM4PB-
19BM1RN17 SMD HF
900-0476591100TR-ND
900-0476591100CT-ND
900-0476591100DKR-ND
Height different
(digikey.5mm;
LHD 13mm)
D-SUB FEMALE R030012105155
D-SUB FEMALE 180'
15P H=10.5mm BLACK
DSB6TC-
15BM1YN30HF HF
2092-K86X-ED-15S-BR-ND Height different (digikey.9mm;
LHD 10.5mm)
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.
Internal and External Power Supplies are available for purchase from the following EU distributor: EET
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, select your country or region, and then
follow the on-screen instructions.

12
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 123.
Remove the Rear Cover:

13
Step 1 Quick release Base stand (M24fd)
(1) Lay the display on soft desk and push the button of stand to unlock the stand, then pull out the stand form the
monitor head.
(2) Twist out the screw and separate base and stand.
Press the white button
Twist out the screw

14
Step 2: Strip two screws from the Rear Cover, then move Rear Cover follow the below way
Step 3: Strip four screws from the hinge.
Step 4: Remove the acetate tapes from the LVDS/ LED cable.
Step 5: Pull out the LVDS/ LED cable to panel.
Remove the screws with
Screwdriver
Dismantle the rear cover first from
the two marked position
Remove the 8pin FFC from main
board then remove rear cover
Remove the DECO

15
Step 6: Strip twelve screws from the Rear Cover supporter and M/B.
Step 1 Quick release Base stand (M27fd)
(1) Lay the display on soft desk and push the button of stand to unlock the stand, then pull out the stand form the
monitor head.
Push up
the white button

16
(2) Twist out the screw and separate base and stand.
Step 2: Strip two screws from the Rear Cover, then move Rear Cover follow the below way
Twist out the screw
Remove the screws with
Screwdriver Dismantle the rear cover first from
the two marked position
Remove the DECO
Remove the 8pin FFC from main
board then remove rear cover

17
Step 3: Strip four screws from the hinge.
Step 4: Remove the acetate tapes from the LVDS/ LED cable.
Step 5: Pull out the LVDS/ LED cable to panel.
Step 6: Strip twelve screws from the Rear Cover supporter and M/B.