HP 22m, 24m, 27m Service Manual

Maintenance and Service Guide

22m/24m/27m model

SUMMARY

This guide provides information about spare parts, removal and replacement of parts, diagnostic tests, problem troubleshooting, and more.

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 2021

Document Part Number: L25744-22m- MSG-V1

Assembly part number: L25744- 001/L25747-001/L25750-001

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”.

Table of Contents
1	Getting 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
2	Monitor features ............................................................................................................................................	3
	Features ..................................................................................................................................................	3
	Front components....................................................................................................................................	4
	Rear components ....................................................................................................................................	5
	Locating the serial number and product number.....................................................................................	6
3	Illustrated parts catalog.................................................................................................................................	8
	How to order parts...................................................................................................................................	9
4 Removal and replacement procedures ...................................................................................................... .		10
	Preparation for disassembly..................................................................................................................	10
	RC .........................................................................................................................................................	10
	Function test..........................................................................................................................................	17
	Support and troubleshooting .................................................................................................................	17
	Index......................................................................................................................................................	19

iii

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: 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 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.

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:

●54.6 cm (21.5 in) diagonal viewable area with 1920 × 1080 resolution, plus full-screen support for lower resolutions, includes custom scaling for maximum image size while preserving the original aspect ratio

●60.47 cm (23.8-inch) diagonal viewable screen area with 1920 x 1080 resolution, plus fullscreen support for lower resolutions; includes custom scaling for maximum image size while preserving original aspect ratio

●68.58 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

●Non-Glare panel with an LED backlight

●Wide viewing angle to allow viewing from a sitting or standing position, or moving from side to side

●Tilt capability

●VGA video input

●HDMI (High-Definition Multimedia Interface) video input

●Plug-and-play capability if supported by the 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

●HDCP (High Bandwidth Digital Content Protection) 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 guides or manuals for your product, go to http://www.hp.com/support and follow the instructions to find your product. Then select Manuals.

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

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