HP E24d G4 Manual

Maintenance and Service Guide
E24d G4&E27d G4 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 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: May 2021
Document Part Number:
L59923-E24d G4-MSG-V1
Assembly part number: L59923-001/
L59923-002/ L59923-710/L59926-001/
L59926-002
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 .................................................................................................. 8
3Illustrated parts catalog .............................................................................................................................................. 9
How to order parts ............................................................................................................................................... 11
4Removal and replacement procedures...................................................................................................................... 13
Preparation for disassembly................................................................................................................................ 13
Rear Cover ............................................................................................................................................................ 13
Power board......................................................................................................................................................... 17
Connector repair .................................................................................................................................................. 19
DP connector CN301/CN401..................................................................................................................... 20
HDMI connector CN201............................................................................................................................. 21
RJ45 connector CN901 ............................................................................................................................. 21
USB connector P103, P104 (VA) & P701, P702 (RA) ................................................................................ 22
USB-C connector P501, P1001................................................................................................................. 22
Headphone connector CN102................................................................................................................... 22
Function test ........................................................................................................................................................ 23
Function test ........................................................................................................................................................ 23
Support and troubleshooting .............................................................................................................................. 23
Index..................................................................................................................................................................... 25

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.

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
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 cm (23.8-inch) diagonal viewable screen area with 1920 x 1080 resolution, plus full-screen
support for lower resolutions; includes custom scaling for maximum image size while preserving
original aspect ratio
●68.5 cm (27-inch) diagonal viewable screen area with 1920 x 1080 resolution, plus full-screen support
for lower resolutions; includes custom scaling for maximum image size while preserving original
aspect ratio
●The monitor features include the following:
●Nonglare panel with an LED backlight
●Skype for Business–certified popup camera and microphone for online collaboration (select models)
●Wide viewing angle to allow viewing from a sitting or standing position, or when moving from side to
side
●Tilt capability
●Pivot capability to rotate the monitor panel from landscape to portrait mode
●Swivel and height adjustment capabilities
●Removable stand for flexible monitor panel mounting solutions
●DisplayPort and VGA video inputs (cables provided)
●One HDMI (High-Definition Multimedia Interface) video input (cable not provided)
●USB 3.0 hub with one upstream port (connects to the computer) and two downstream ports (connect
to USB devices)
●USB BM to AM cable provided to connect the monitor’s USB hub to the USB connector on the computer
(23.8–inch model only)
●USB CM to AM cable provided to connect the monitor’s USB hub to the USB connector on the computer
(27–inch model only)
●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
●Cyberlink YouCam software
●HDCP (High-bandwidth Digital Content Protection) copy protection on all digital inputs
●Software and documentation optical disc (provided with the monitor in select regions) that includes
monitor drivers and product documentation

4
●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.

5
Front components
To identify the components on the front of the monitor, use this illustration and table.
Front of monitor showing location of controls
Table 1-1: Front components and their descriptions
Component
Function
1
Webcam LED
2
Full High Definition (FHD) webcam
3
Microphone
4
Power light
On: The monitor is on.
Amber: Monitor is in a reduced power state
because of inactivity.
Blinking amber: Monitors is in a reduced power
state because of an Energy Saver setting.
5
Menu/ Select
Opens the OSD menu or selects items on the OSD
menu.
6
Next Active Input or Information / Minus
Next Active Input or Information: If the OSD
menu is inactive, press to show Monitor
information OSD under DisplayPort source
Minus: If the OSD menu is open, press to
navigate backward through the OSD menu and
decrease adjustment levels

6
7
Viewing Modes / Plus
Viewing Modes: If the OSD menu is inactive,
press to activate the Viewing Modes to choose
different video settings.
Plus: If the OSD menu is open, press to navigate
forward through the OSD menu and increase
adjustment levels
8
Brightness
Open the brightness chart, press to choose
different brightness level.
9
Power button
Turns the monitor on or off.
Rear components
To identify the components on the rear of the monitor, use this illustration and table.
Rear of monitor showing location connectors
Table 1-2: Rear components and their descriptions
Component
Function
1
Master Power switch and
connector
Master Power control.
Connects the power cord.
2
HDMI port
Connects the HDMI cable to the monitor.
3
Display Port Input port
Connects the Display Port cable to the monitor
4
USB Type-C HUB port
Connects the USB Type-C cable to the monitor*.
*Only this port connected (as a HUB), the fellow ports would be
active.

7
5
Display Port Output port
Connects the Display Port cable to the extension monitor.
6
USB Type-C Thunderbolt
port with HP Sleep and
Charge
When the monitor is on, the USB Type-C port connects a USB device,
provides data transfer, and even when the monitor is off, charges
most USB devices that have a Type-C connector, such as a mobile
phone, camera, activity tracker, or smart watch, and provides data
transfer.
7
RJ-45 (network) jack
Connects the network cable to the device.
8
USB 3.1 Super Speed port
Connects a USB device, such as a mobile phone, camera, activity
tracker, or smart watch, and provides high-speed data transfer.
9
USB 2.0 (downstream)
Connects a USB device.
10
Headset/Mic Combo jack
Connects the headphone
11
Security Lock Slack
Connects the Security Cable
12
Stand Release Button
Release the Stand

8
Locating the serial number and product number
The SPEC label (1) and Barcode 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.
Label Location
For worldwide models:
E24d G4:
Barcode label
Barcode label for worldwide region
E27d G4：
Barcode label
Barcode label for worldwide region
E24d G4/E27d G4：
Spec label
Spec label for worldwide region

9
3Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
Mechanical explosion
Item
Description
Qty
1
LG PANEL
1
2
MID-FRAME_QWHH
1
3
PI BOARD
1
4
IF BOARD
1
5
MAIN PCB SHIELDING
1
6
IO Cover
1
7
USB BOARD
1
8
E274D_SIDE_BKT
1
9
E274D_Webcam_ASSY
1
10
REAR COVER_QWHH
1
11
STAND_ARM_ASSY
1
12
STAND_BASE_ASSY
1
13
KEYPAD
1
14
E274D_KEY_PAD
1
15
LENS, V201, HF
1
16
LENS, V201, HF
1
17
E274D_SLIDE
1
18
E274D_RELEASE_BUTTON
1
19
MYLAR, POWER BOARD BOTTOM, P174
1

10
20
SPK BAR COVER, JB, MT11010, HF
1
21
keypad
1
22
BUTTON, POWER, OSD, PC, P174
1
23
LENS, POWER, PC, P174, HF
1
24
BUTTON, POWER, OSD, PC, P174
1
25
DISPLAY CHIN
1
A
SCREW_Iron_I_M3*3_Machine_Black Zn
14
B
SCREW, F, CROSS, T3*6, Zn
6
C
SCREW, I, CROSS, M4*10, BLK-NL
4
D
SCREW, PW, CROSS M4X9, Zn-CC
1
E
SCREW, P, CROSS M3*6, ZN-CC
10
F
SCREW, I, CROSS, M3*4 ZN-CC
2

11
How to order parts
The HP authorized repair center can purchase the power board from HP.
Power board
Description
HP spare part number
Manufacturer part number
Remark
PCBA, PI/BD, W/OSPK, LP24QJ-
A1V/E24d/HF
M84521-001
790PB1400A00H01
Common power
board of E24d
G4&E27d G4
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)
•Digi-Key Component: Digi-Key Electronic United Kingdom
Capacitors by distributor
Component
description
Location
Component
distributor
Distributor part number
Capacitor 680 µF
10*12.5 10K
C816 and
C817
Farnell
16ZLH680MEFC10X12.5
Capacitor 680 µF
10*12.5 6K
16ZLS680MEFC10X12.5
Capacitor 680 µF
10*12.5 10K
RS
16ZLH680MEFC10X12.5
Connectors by manufacturer
Component description
Location
identifier
Component
distributor
Distributer part number
HDMI Port
CN201
Farnell
208658-1051
Display Port
CN301,
CN401
Farnell
47272-0001 (Notes: the rear cover and
chassis need to be modified to make the
connector opening larger)
Headphone
CN102
N/A
N/A (Please contact HP Service)
RJ45
CN901
Digi-Key
6116075-1 (Notes: the rear cover and
chassis need to be modified to make the
connector opening larger)
USB(VA)
P103, P104
Digi-Key
0484080003 (Notes: the rear cover and
chassis need to be modified to make the
connector opening larger)
USB(RA)
P701, P702
Farnell
48405-0003(Notes: the chassis and rear
cover need to be modified to make the
connector opening larger)
USB-C
P501, P1001
Farnell
DX07S024JJ2R1300
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.

12
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.

13
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 13.
Remove the Rear Cover:
1) Remove four screw from Disassemble VESA screws.

14
Remove the VESA-screws
2) Disassemble Rear-cover: Use disassembling tool to separate bucket from monitor (starting from the
disassembling hole as shown). Watch out the cable of the Keypad/camera/USB.
Disassemble Rear-Cover
3) Disassemble rear-cover assembly: use screwdriver to disassemble side USB and Webcam Assy

15
Disassemble Rear-cover Assembly
4) Disassemble Side USB Chassis Assembly: Release all screws that fixed on chassis then to take out the PCB
Board.
Disassemble Side USB Chassis Assembly
5) Disassemble webcam Assembly: Release the screw that fixed on PCB and peel camera PMMA glass use
tool/hand, then disassemble webcam Assy and take out the camera PCB

16
Disassemble Side Webcam Assembly
6) Disassemble IO Cover: Release the screws that fixed on Panel and peel off all Foils
Disassemble IO Cover
7) Disassemble chassis PCB: Release the screw that fixed on PCB and peel off Mylar/rubber
Disassemble Chassis PCB