HP 24 Manual

Maintenance and Service Guide
Mini-in-One 24 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: Mar 2021
Document Part Number:
L56039--Mini-in-One 24-MSG-V1
Assembly part number: L56039-001
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
Side components.................................................................................................................................................... 4
Rear components ................................................................................................................................................... 5
Locating the serial number and product number .................................................................................................. 6
3Illustrated parts catalog .............................................................................................................................................. 8
How to order parts ................................................................................................................................................. 9
4Removal and replacement procedures ...................................................................................................................... 10
Preparation for disassembly................................................................................................................................ 10
RC.......................................................................................................................................................................... 10
Connector repair .................................................................................................................................................. 13
DP connector CN5 ..................................................................................................................................... 15
DC jack connector CN1 .............................................................................................................................. 16
USB upstream connector P1..................................................................................................................... 16
USB connector P2, P3, P4, P5 (VA) & P1, P2 (RA) ..................................................................................... 16
USB-C connector P1.................................................................................................................................. 17
Headphone connector CN2 ....................................................................................................................... 17
Function test ........................................................................................................................................................ 18
Function test ........................................................................................................................................................ 18
Support and troubleshooting .............................................................................................................................. 18
Index..................................................................................................................................................................... 20

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-in) diagonal viewable screen area with 1920 × 1080 resolution, plus full-screen support
for lower resolutions
●Nonglare panel with an LED backlight
●Wide viewing angle to allow viewing from a sitting or standing position, or when moving from side to
side
●Supports a 35 W or 65 W HP Desktop Mini attached to the rear of the HP Mini-in-One in a fully enclosed
compartment
●Single Power On for both the HP Desktop Mini and the HP Mini-in-One
●On-screen display (OSD) adjustments in several languages for easy setup and screen optimization
●Plug and Play capability, if supported by your operating system
●Tilt, swivel, height, and pivot adjustment capabilities
●Removable stand for flexible display head mounting solutions
●VESA® mounting capability for attaching the display to a wall mount device or swing arm
●USB Type-C connector for interfacing with an HP Desktop Mini
●6 USB 3.1 Gen1 ports (4 on the rear and 2 on the side)
●USB Type-B upstream port
●One DisplayPort™ video input
●Audio-out (headset) jack on side
●2.5 W stereo internal speakers
●1080p HD webcam
●Security cable slot on rear of display for optional security cable
●HDCP (High-bandwidth Digital Content Protection) used on all digital inputs
●Power Saver mode 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
Dual-array microphones
Record sound.
2
Webcam light
Indicates the webcam is on.
3
Webcam shutter
Opens or closes the webcam.
4
Webcam lens
Allows you to share video of your image.
5
Speaker grill
Covers the stereo speakers.
6
Power button
Turns the monitor on or off.
Side components
To identify the components on the sides of the monitor, use this illustration and table.
Front of monitor showing locations of front components

5
Table 1-2: Side components and their descriptions
Component
Function
1
Headset jack
Connects headphones or a headset.
2
USB 3.1 Gen1 ports (2)
Connect USB devices.
Rear components
To identify the components on the rear of the monitor, use this illustration and table.
Sides of monitor showing locations of side components
Rear of monitor showing locations of rear components

6
Table 1-3: Rear components and their descriptions
Component
Function
1
Security cable slot
Connects an optional security cable.
2
USB 3.1 Gen1 ports (4)
Connect USB devices.
3
Stand release latch
Releases the stand.
4
Power connector
Connects an AC adapter.
5
USB-Type-B upstream port
Connects the USB hub cable to a source
device such as a computer
6
DisplayPort connector
Connects a DisplayPort cable to a source
device such as a computer.
7
Master power switch
Turns off all power to the display.
8
Back button
If the OSD menu is open, press to exit or
return to previous menu level.
If the OSD menu is closed, press to open the
Brightness menu.
9
Plus button
If the OSD menu is open, press to navigate
forward through the OSD menu and increase
adjustment levels.
If the OSD menu is closed, press to open the
Color menu.
10
Minus button
If the OSD menu is open, press to navigate
backward through the OSD menu and
decrease adjustment levels.
If the OSD menu is closed, press to open the
Next Active Input menu.
11
Menu/OK button
Press to open the OSD menu, or select a
menu item from the OSD.
12
USB Type-C cable
Connects an HP Desktop Mini inserted into
the display rear compartment.
Locating the serial number and product number
The serial number and product number are located on a barcode label on the bottom edge of the display head.
You may need these numbers when contacting HP about the display model.