HP M27fq User manual

Maintenance and Service Guide
M27fq model
SUMMARY
This guide provides information about spare parts, removal and replacement of parts, diagnostic tests, problem
troubleshooting, and more.
M31385

© 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 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:M31385-M27fq-
MSG-V1
Assembly part number: M31385-001
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 .................................................................................................. 5
3Illustrated parts catalog .............................................................................................................................................. 7
How to order parts ................................................................................................................................................. 9
4Removal and replacement procedures ...................................................................................................................... 10
Preparation for disassembly................................................................................................................................ 10
Rear Cover............................................................................................................................................................ 11
Connector repair .................................................................................................................................................. 13
DP P300 .................................................................................................................................................... 14
HDMI connector P100 P200...................................................................................................................... 15
Function test ........................................................................................................................................................ 16
Support and troubleshooting .............................................................................................................................. 17
Index..................................................................................................................................................................... 18

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1Getting 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.
●If you must replace a capacitor, insert new parts carefully to avoid a short circuit caused by the near

2
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:
●68.47 cm (27-in) diagonal viewable area with 2560 x 1440 resolution, plus full-screen 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
●Wide color gamut to provide coverage of sRGB color spaces
●Nonglare screen with an LED backlight
●Wide viewing angle to allow viewing from a sitting or standing position, or moving from side to side
●Tilt adjustment capabilities
●High–Definition Multimedia Interface (HDMI), and DP inputs
●Four OSD buttons, three that can be reconfigured 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

5
Rear components
To identify the components on the rear of the monitor, use this illustration and table.
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.

6
Barcode label
Spec label
Bar code label

7
3Illustrated parts catalog
To identify the monitor major components, use this illustration and table.

8
Item Description Qty
1 LM270WQ4-HSAK1 Encore III M27fq LCM P/N （black）1
2 WH A1007H00-6P-2L/A1251-H06#28 75MM+ACETATE W/B HF 1
3
WH FFC 41P(0.5mm) 320mm(2FOLD+PRO)60V G/F W/CONN(A5+BC)+AL(AA) HF
WH FFC 51P(0.5mm) 220mm(1FOLD+PRO)60V G/F W/CONN(A5+BC)+AL(AA) 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 1
6 REAR SUPPORT-M(PCR-85% ABS+5% PET/JACK BLACK 1
7 REAR SUPPORT-R(PCR-85% ABS+5% PET/JACK BLACK 1
8 MAC. SCREW-MI M3.0*4.0L, BLK-Ni 15
9 MYLAR BLACK(185*45*0.325t) 1
10 MAIN BD ASS'Y HP Encore III M27fq (LM270WQ4-HSAK1) 1
11 SHIELDING (SECC 0.5T)(1DP2H)(ENCORE3) 1
12 MYLAR BLACK(16.5*15*0.325t) (ENCORE 3-SHIELDING MIDDLE SCREW) 1
14 REAR COVER(ABS 85% PCR +5% OBP/JACK BLACK (6009-0337))(ENCORE 3-
M27FQ) ASS’Y 1
14-1
REAR COVER(ABS 85% PCR +5% OBP/JACK BLACK (6009-0337))(ENCORE 3-
M27FQ)
1
14-2 DISPLAY BD ASS'Y HP Encore III 1
14-3 DISPLAYKEY(ABS 85% PCR +5% OBP/JACK BLACK (6009-0337))(ENCORE 3) 1
14-4 SPONGE PU(24.0*12.0*16.0t)(ENCORE2_23F)(BLK) 1
14-5 SPONGE PU(80*3.0*8.0T)(BLK) 1
14-6 POWER LENS(PC/TRANSPARENT)(2213xi) 1
15 MAC. SCREW-MI M3.0*6.0L, BLK-ZNNI(HEAD DIAMETER 7.0) 2
16 HINGE(ENCORE3-M27f)(Sliver) CX 1
17 NECK(ENCORE3-M27f)(Sliver) ASS'Y CX 1

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How to order parts
Connectors by manufacturer
•Digi-Key Component: Digi-Key Component United Kingdom
•
TYPE
LHD P/N
Main Source SPEC.
Distributer P/N
Different than Main
Source
HDMI R030410000210 19P 180' H=13mm SMD
900-0476591100TR-ND
900-0476591100CT-ND
900-0476591100DKR-ND
H=8.5mm
DP R030470000290 20P 180' H=13mm SMD A118339-ND H=15.96mm
HDMI:
0476591100 Molex | Connectors, Interconnects | DigiKey
DP:
2041441-1 TE Connectivity AMP Connectors | 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/
18 BASE(ENCORE3-M27f)(Sliver) CX 1
19 FRONT DECO(ABS 85% PCR +5% OBP/NATURAL SILVER)(ENCORE 3-
M27FQ)ASS'Y 1
19-1 FRONT DECO(ABS 85% PCR +5% OBP/NATURAL SILVER)(ENCORE 3-M27FQ) 1
19-2 LENS(PC122/TRANSPARENT)(ENCORE 3) 1
19-3 FOAM TAPE (L606*W3*0.6t EXP060-D33-S) 1

10
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.
Read the “Important safety information” and “Important service information and precautions” sections in the “Getting
started” chapter of this guide.
Clean the room for disassembly.
Identify the disassembly area.
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:

11
Rear Cover
Before removing the RC, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 14.
Step 1 Quick release Base stand
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.
Push up the whlte
button
Twist out the
screw

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3. Strip two screws from the rear cover，then move rear cover follow the below way
4. Strip four screws from the hinge
5. Remove the acetate tapes from the LVDS/ LED cable.
6. 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

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7. Strip twelve screws from the rear cover supporter and M/B.
Connector repair
This procedure includes HDMI, DisplayPort and audio connectors.
The connectors are on the main board (board part number R017122810774).
The connectors identifiers are as follows:
Connector
Location
DP
P300
HDMI P100, P200

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Before repairing connectors, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 10.
DP P300
Repair the DisplayPort connector:
1) Use a hot air gun to melt the solder on the pins. Pin solder with soldering iron and absorber. You can gently
push down with the soldering iron once everything is molten to move the P300 out of the through holes.
2) Use a soldering iron or hot air gun to melt the solder on the pins.

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3) Lift the P300 connector from the PCB.
4) Place the new component on the PCB. Be sure that it matches the PCB footprint.
5) Solder the new component.
HDMI connector P100 P200
Repair the HDMI connector:
1) Use a soldering iron and a disordering pump to remove as much solder as possible from the pin.
2) Use a soldering iron or hot air gun to melt the solder on the pins.

16
3) Lift the P100, P200 connector from the PCB.
4) Place the new component on the PCB. Be sure that it matches the PCB footprint.
5) Solder the new component.
Function test
After repair, be sure to confirm that all functions are working.
Table
4-1: Function test
Te Operating description Tool used
HDMI test
Test item Operating description Tool used
Confirm whether image displays correctly
on the monitor.
Computer or DVD player
DP test Computer or DVD player
Confirm whether image displays correctly
on the monitor.