HP M27h Manual

Maintenance and Service Guide
M27h model
N28341
M24h model
N28338

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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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: December 2022
Document Part Number: N28339-M24h-
MSG-V1
Assembly part number:
N28342-001
M28339-001
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.....................................................................................7
3Illustrated parts catalog.................................................................................................................................8
How to order parts...................................................................................................................................9
4Removal and replacement procedures.......................................................................................................12
Preparation for disassembly..................................................................................................................12
Rear Cover............................................................................................................................................12
Connector repair....................................................................................................................................16
HDMI connector P200/P300.......................................................................................................17
VGA connector P100..................................................................................................................18
Function test..........................................................................................................................................18
Support and troubleshooting.................................................................................................................20

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: Onlytrained 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
safetyinformation.
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:
●M27h: 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
M24h: 60.47cm (23.8 in) diagonal viewable area with 1920 ×1080 resolution, plus fullscreen
support for lower resolutions, includes custom scaling for maximum image size while preserving
the 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), 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 guide, go to http://www.hp.com/support, and follow the
instructions to find your product. Then select User Guides.

4
Front components
To identify the components on the front of the monitor, use this illustration and table.
M27h/M24h:
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 Power button
Turns the monitor on or off.
4 Power light
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.
NOTE: You can reconfigure the Function buttons in the OSD menu to quickly select the most commonly used
operations. Press the Menu button to open the OSD, and then select Menu Control. Select Assign
buttons, and then select one of the available options for the button you want to assign.

5
Rear components
To identify the components on the rear of the monitor, use this illustration and table.
M24h:
Component Function
1 Security cable slot Connects an optional security cable..
2 Power connector Power connector
3 Power Light On: The monitor is on.
Off: Depending on your monitor model,the
monitor is off or in sleep mode
4 VGA connector Connects a VGA cable to the source device.
5 HDMI port 1 Connects an HDMI cable to the source device

6
M27h:
Component Function
1 Security cable slot Connects an optional security cable..
2 Power connector Power connector
3 Power Light On: The monitor is on.
Off: Depending on your monitor model,the
monitor is off or in sleep mode
4 VGA connector Connects a VGA cable to the source device.
5 HDMI port 1 Connects an HDMI cable to the source device
HDMI ports 2 Connects an HDMI cable to the source device

7
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 for support.
For worldwide models (except India):
Barcode label
M27h
M24h
Safety label
M24h
M27h：
For India:
Bar code label
M24h：
M27h：
Spec label
M24h
M27h：

8
3 Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
M24h
Item Description Qty
1 [M238WF2-HSAKT LM238WF2-HSAKT Encore III M24fLCM
P/N(Block) 1
2 WH A1007H00-6P-2L/A1251-H06 28 75mm+ACETATE W/B HF 1
3WH FFC 30P(1.0mm)180mm(IFOLD+PRO)GOV/ G/F
W/CONNAT5+BC)+AL HF 1
4 FFC 8P(0.5mm) 400mm (2FOLD+2PRO)/ 6OV G/F (A8+A8) HF 1
5 REAR SUPPORT-L CPCR-85% ABS+5% PET/MCK BLACK.
(6009-0337))(ENCORE 3-M24F) 1
6 REAR SUPPORT-R(PCR-85x A8S+5% PETAIACK BLACK (6009-
0537)/(ENCORE 3-M24f) 1
7 MAC. SCREW-MI M3.0*4.0L, BLK- Ni 14
8 MAIN BD ASS'Y HP Encore III M24h (LM238WF2-HSAK1) 2L
1
9 SHIELDING (SECC 0.5T(1A2H-AUDIO)(ENCORE3) 1
10 REAR COVER(ABS 85% POR +5% OBP/JACK BLACK (6009-
0337))(HD M24h)ASSY 1
10-1 REAR COVER(ABS 85% PCR +5% 0BP/JACK BLACK (6009-
0337))(Hp M24h)
1

9
M27h:
10-2 DISPLAY BD ASSY HP Encore !! 1
10-3 ISPLAYKEYABS 85% PER +5% OBP/JACK BLACK (6009-
0337)(ENCORE 3) 1
10-4 SPONGE PU(15*12*13t)(BLK) 1
10-5 SPONGE PU/80*3.0*8.0T)(BLK) 2
10-6 POWER LENS(PC/TRANSPARENT)2213x)
1
11 MAC. SCREW - MI M3.O*6.OL, BLR-ZNNCHEAD DIAMETER 7.0)
2
12 HINGE-HOLDER BKTISGCC 2T) (HD M24h&M27h)
1
2
13 NECK(Hp M24h)(Sliver)_CX
1
14 BASE(Hp M24h)(Sliver)_CX 1
15 FRONT DECO(ABS 85% PCR +5% OBP/CERAMIC
WHITE)(ENCORE 3-M27FWA)ASS'Y 1
15-1 FRONT DECO(ABS 85% PCR +5% OBP/CERAMIC
WHITE)(ENCORE 3-M27FWA) 1
15-2 LENS(PC122/TRANSPARENT)(ENCORE 3) 1
15-3 FOAM TAPE (L606*W3*0.6t EXP060-D33-S) 1

10
Item Description Qty
1 M270HANO1.6-HSAK1 Encore III 271 LCM P/N(BLACK). 1
2 LENS(PC122/TRANSPARENT) (ENCORE 3) 1
3FRONT DECO( ABS 85% PCR_ +5% QBP/NATURAL SILVER(HP
M27h) 1
4 FROM TAPEL LL606#13*0.64 EXP060-D33-S) 1
5 MAIN BD ASSY HP Encore Ml M271M27OHANO1.6-HSAKT)2L 1
6 MAC. SCREW-MI M3.0:4.0L. BLK-Ni 16
7 WH FFC 30RC1.0mm)230mmLIFOLD+PRO)GOV GIF
W/CONNA15+BC)+AL HF 1
8 WH FFC 8P(0.5mm)350mm(3FOLD)6OV G/F (A8+A6) HF 1
9 WH A1007H00-6P-21/A1251-H06 #28 75mm+ACETATE W/8 HF 1
10 MAC. SCREW-MI M3.0°4.0L, BLK-Ni 2
11 REAR SUPPORT-L(PCR-85% ABS+5% PET/UACK BLACK
(6009-0337))CENCORE 3-M27h) 1
12 REAR SURRORT-R(CRCR-85% ABS+5% PETWACK BLACK
(6009-0337))(ENCORE 3-M/27h) 1
13 HINGE-HOLDER BKT(SGCC 27)(Hp M24h&M27h) 1
14 SHELOING (SECC O.5T)(1A2H-AUDIO)(ENCORE3)-C 1
15 MAC. SCREW-MH #4-40°5.OL.Ni1
16 Gasket Block 30L 8W*6.5Hmm comber surface 2
17 REAR COVERCPCR-85%+5% PETAUACK BLACK (6009-
0337))04/0 M27h) 2
18 DSPLAYKEYABS 85% PCR +5% O8P/ACK BLACK (6009-
0337))(ENCORE 3) 1
2
19 DISPLAY BD ASS'Y HP Encore III 1
20 POWER LENS(PC/TRANSPARENT)(2213x) 1
21 NECK(Hp M27h)(Sliver)Cx 1
22 BASE (Hp M27h)(Sliver)_CX 1
23 LENS(PC122/TRANSPARENT)(ENCORE 3) 1

11
How to order parts
Connectors by manufacturer
HDMI:
0476591100 Molex | Connectors, Interconnects | DigiKey
VGA:
K86X-ED-15S-BR Kycon, Inc. | Connectors, Interconnects | DigiKey
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.
Internal and External Power Supplies are available for purchase from the following EU distributor: EET
https://www.eetgroup.com/en-eu/
TYPE Location Main Source
SPEC.
Distributer P/N Different
than Main
Source
HDMI
P200/P300 19P 180' H=13mm
SMD
900-0476591100TR-ND
900-0476591100CT-ND
900-0476591100DKR-ND
H=8.5mm
VGA P100 180' 15P
H=10.5mm
2092-K86X-ED-15S-BR-ND H=6mm;

12
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 12.
Remove the Rear Cover:

13
Step 1 Quick release Base stand
a. (1). Lay the display on soft desk and Twist out the screw , then pull out the stand form the monitor
head.
b. Twist out the screw
c. Pull out stand & base with another hand
(2). Twist out the screw and separate base and stand.
Twist out the screw
Twist out the screw

14
Step 2: Remove the 2 screws from the back cover and use tools to open the back cover
Step 3: Remove the 8pin FFC from main board then remove rear cover
Step 4: Remove 2 strip of acetate tape from the LVDS/LED cable.
Step 5: Pull out the LVDS/ LED cable to panel.
Step 6: Remove the six screws from the bracket and mainboard.

15
Step 7: Strip 10 screws from the middle frame

16
Connector repair
M24h:
This procedure includes HDMI and VGA connectors.
The connectors are on the main board (board part number R352447120150(AUO)/R352446920150(LHD))
The connectors identifiers are as follows:
Connector Location
HDMI P200
VGA P100
M27h
This procedure includes HDMI and VGA connectors.
The connectors are on the main board (board part number R352731320150(AUO)/ R352731220150(LHD))
The connectors identifiers are as follows:
Connector Location
HDMI 1/2 P200/P300
VGA P100
Before repairing connectors, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 12.
P300 P200 P100
P200 P100