HP M27fw Manual

Maintenance and Service Guide
M27f model
M31376
M27fe model
M73283
M27fw model
M31379
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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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
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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: Feb 2022
Document Part Number:
M31376-M27f-MSG-V1
Assembly part number:
M31376-001
M73283-001
M31379-001
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.................................................................................................................................................. 5
Rear components ................................................................................................................................................... 6
Locating the serial number and product number .................................................................................................. 5
3Illustrated parts catalog .............................................................................................................................................. 9
How to order parts ................................................................................................................................................. 8
4Removal and replacement procedures ........................................................................................................................ 9
Preparation for disassembly.................................................................................................................................. 9
REAR COVER............................................................................................................................................................ 9
Connector repair .................................................................................................................................................. 12
VGA connector P100 ................................................................................................................................. 13
HDMI connector P200/P201 ..................................................................................................................... 18
Function test ........................................................................................................................................................ 15
Support and troubleshooting .............................................................................................................................. 15
Index..................................................................................................................................................................... 17

1
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:
●68.6 cm/27 in diagonal viewable screen area with 1920 × 1080 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
●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 when moving from side to
side
●Tilt adjustment capability
●High-Definition Multimedia Interface (HDMI) video inputs (cable provided)
●VGA video input (cable provided)
●Plug and Play capability, if supported by your operating system
●Security cable slot provision on rear of monitor for 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 the theft deterrence
features
●High-bandwidth Digital Content Protection (HDCP) copy protection on all digital inputs
●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.
Table 2-1: Front components and their descriptions
Component
Function
1 Menu / OK Menu: If the OSD menu is closed, opens the OSD main menu.
OK: If the OSD menu is open, selects an item in the OSD menu.
2 Information / Auto-Adjustment / Minus
Function button 3—assignable
Information: If the OSD menu is closed and HDMI is the primary
video source, opens the Information menu.
Auto-Adjustment: If the OSD menu is closed and VGA is the primary
video source, activates the auto-adjustment feature to optimize
the screen image.
Minus: If the OSD menu is open, navigates backward through the
OSD menu and decreases adjustment levels.
3
Input
/
Plus
Function button 2—assignable
Input
: If the OSD menu is closed, switches to the next video input
port (VGA or HDMI).
Plus: If the OSD menu is open, navigates forward through the OSD
menu and increases adjustment levels.
4
Viewing Modes
/
Exit
Function button 1—assignable
Viewing Modes
: If the OSD menu is closed, opens the Viewing
Modes menu to choose different screen viewing settings.
Exit: If the OSD menu is open, saves changes and exits the OSD
menu.
5
Power
Turns the monitor on or off.
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.
Table 2-2: Rear components and their descriptions
Component
Function
1 HDMI ports (2)
Connect HDMI cables to the HDMI connectors on
source devices.
2 VGA connector
Connects a VGA cable to the DisplayPort
connector on the source device.
3 Power connector
Connects an DC adapter.
4 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 for support.

6
For worldwide models
Rating label
M27f
M27fe
M27fw
Safety label

7
3Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
M27f/M27fe/M27fw
Item Description Q’ty
1 Encore III M27f LCM P/N(Black)/Encore III M27fw LCM
P/N(White)/ Encore III M27fe LCM P/N(Black)
1
2 WH A1007H00-6P-2L/A1251-H06 #28
75mm+ACETATE W/B HF
1
3 WH FFC 30P(1.0mm)230mm(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% PU/JACK BLACK
(6009-0337)
1
6 REAR SUPPORT-M(PCR-85% ABS+5% PU/JACK BLACK
(6009-0337)
1
7 REAR SUPPORT-R(PCR-85% ABS+5% PU/JACK BLACK
(6009-0337)
1
8 MAC SCREW-Ml M3.0*4.0L, BLK-N, 16

8
How to order parts
Connectors by manufacturer
•Digi-Key Component: Digi-Key Component United Kingdom
Component description Location
identifier
Component
distributor
Distributer part number
VGA P100 RS
10090929
-S154XLF
HDMI P200/P201
Farnell
51V019S
-33WN-BD
Digikey
483078012
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/
9 MYLAR BLACK(/85*60*0.3251 1
10 MAIN BD ASS'Y HP Encore III M27f/M27fw/M27fe 1
11 SHIELDING (SECC 0.5T)(1A2H-AUDIO)(ENCORE3)-C 1
12 MYLAR BLACK(/65*15*03251) 1
13 MAC. SCREW-MH #4-40*5.0L 2
14 REAR COVER 1
14-1 REAR COVER 1
14-2 DISPLAY 8D 1
14-3 DISPLAYKEY 1
14-4 SPONGE PU(15*12*13t)(BLK) 1
15 MAC. SCREW-MI M3.0*6.0L, BLK 2
16 Hinge(Encore 3-M27f)(Sliver) CX 1
17 Neck(Encore 3-M27f)(Sliver) CX 1
18 Base(Encore 3-M27f)(Sliver) CX 1
19 Front Deco 1
19-1 Front Deco 1
19-2 LENS(PC122/TRANSPARENT)(ENCORE 3) 1
19-3 From tape(L606*W2*0.6t EXP060-D33-S) 1

9
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
9.
Remove the Rear Cover:

10
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.
3. Strip two screws from the rear cover，then move rear cover follow the below way
Push up the white
button
Twist out the
screw

11
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

12
7. Strip fourteen screws from the rear cover supporter and M/B.
Connector repair
This procedure includes HDMI and VGA connectors.

13
This procedure includes VGA, HDMI connectors.
The connectors are on the main board.
The connectors identifiers are as follows:
Connector
Location
VGA
P100
HDMI P200/P201
Before repairing connectors, follow these steps:
▲Prepare the monitor for disassembly. See Preparation for disassembly on page 9.
VGA P100
Repair the VGA 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 P100 out of the through holes.
2) Lift the P100 connector from the PCB..
3) Place the new component on the PCB. Be sure that it matches the PCB footprint.
4) Solder the new component.
P100
P200
P201

14
HDMI connector P200/P201
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.
3) Lift the P200/P201 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.

15
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.
Table 4-1: Function test
Test item Operating description Tool used
HDMI test Confirm whether image displays correctly
on the monitor.
Computer or DVD player
VGA test Confirm whether image displays correctly
on the monitor.
Computer or DVD player
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 Sleep mode. Press any key on the keyboard or move the
mouse to exit Sleep mode.
Video card is incompatible. Open the OSD menu and select the Input
Control menu. Set Auto-Switch Input to Off
and manually select the input
Image appears blurred,
indistinct, or too dark.
Brightness is too low. Open the OSD menu and select Brightness to
adjust the brightness scale as needed.
Check Video Cable is
displayed on screen.
Monitor video cable is disconnected. Connect the appropriate video signal cable
between the computer and monitor. Be sure
that the computer power is off while you
connect the video cable.
Input Signal Out of
Range is displayed on
screen.
Video resolution and/or refresh rate
are set higher than what the monitor
supports.
Change the settings to a supported setting.
The monitor is off, but it
did not seem to enter into
Sleep mode.
The monitor’s power saving control is
disabled.
Open the OSD menu and select Power
Control > Auto-Sleep Mode and set auto-
sleep to On.
On-Screen Menus are
Locked is displayed.
The monitor’s OSD lock function is
enabled.
Press and hold the Menu button on the front
bezel to 10 seconds to disable the OSD
lockout function.
Power Button is Locked
is
Displayed
The monitor’s power button is locked.
Press and hold the power button for 10
seconds to disable the power button lock
function.

16