Maintenance and Service Guide
E22 G4 model
SUMMARY
This guide provides information about spare parts, removal and replacement of parts, diagnostic tests, problem
troubleshooting, and more.
Table of Contents
1. Getting started ..........................................................................................................................................................................................1
Important safety information..........................................................................................................................................................1
2. Monitor features........................................................................................................................................................................................4
Features...............................................................................................................................................................................................4
4. Removal and replacement procedures................................................................................................................................................11
Rear cover.........................................................................................................................................................................................11
Power board.....................................................................................................................................................................................15
Repair the usb connector:..............................................................................................................................................................17
HDMI connector CN502.................................................................................................................................................18
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.
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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.
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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
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Repair must be performed by professional service technicians in a repair center. End users should not
perform these procedures.
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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.
1
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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
2
product before returning it to the customer.
3
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 screen area with 1920 × 1080 resolution
In-plane switching (IPS) panel
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, swivel, and height adjustment capabilities
Pivot capability to rotate the monitor head from landscape to portrait orientation
Removable stand for flexible monitor head mounting solutions
HP Quick Release 2 device to quickly attach the monitor head to the stand with a simple click, and then
remove it with the convenient sliding tab release
DisplayPort™ video input (cable included)
High-Definition Multimedia Interface™ (HDMI) video input (cable included)
VGA video input (cable included in select regions)
USB hub with one USB Type-B port (cable included) that connects to the computer (upstream) and four USB
ports that connect to USB devices (downstream)
Four on-screen display (OSD) buttons, three that you can reconfigure to quickly allow selection of the most
commonly used operations
Plug and Play capability if supported by your operating system
VESA® mounting bracket for attaching the monitor head to a wall-mount device or swing arm
Security cable slot on the rear of the monitor for an optional security cable
Cable management feature for placement of cables and cords
On-screen adjustments in several languages for easy setup and screen optimization
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.
instructions to find your product. Then select Manuals.
4
Rear components
To identify the components on the rear of the monitor, use this illustration and table.
Table 1-1: Rear components and their descriptions
Component
Function
1
Security cable slot
Connects an optional security cable.
Connects the power cord
2
Power connector
3
4
VESA release button
Connects the DisplayPort cable to a source device
such as a computer or game console
DisplayPort connector
Connects the DisplayPort cable to a source
device such as a computer or game console
5.
HDMI port
Connects the HDMI cable to a source device
such as a computer or game console
6
7
VGA port
Connects the VGA cable to the source device
USB Type-B port (upstream)
Connects the USB Type-B cable to a source device
such as a computer or game console.
8
9
USB ports (2) (downstream)
USB ports (2) (downstream)
Connect a USB cable to a peripheral device, such as a
keyboard, mouse, or USB hard driver
Connect a USB cable to a peripheral device, such as a
keyboard, mouse, or USB hard drive.
6
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 about the
monitor.
For worldwide models (except India):
Barcode label and spec label
For India: （N/A）
7
14
15
16
17
18
19
20
21
S1
S2
S3
S4
S5
RELEASE BUTTON
KEY BOARD
KEY BUTTON
REAR COVER
HP LOGO
SPEAKER COVER
STAND
BASE
SCREW M3 X6
SCREW M4 X6
SCREW M3 X4
SCREW Q3 X4
SCREW M4 X4
1
1
1
1
1
1
1
1
5
1
11
3
4
How to order parts
The HP authorized repair center can purchase the adaptor from HP.
Power board
Description
HP spare part number
Manufacturer part number
E22 G4
E22 G4
E22 G4
M97943-001
M97944-001
M97945-001
PLPCJB541IQA2
PLPCJB391GQA3
PLPCJB631IQA4
Capacitors and connectors are available for purchase from the following EU distributors:
Capacitors by distributor
Component
description
470uF 20% 25V 10*12.5 C904
Location
Component
distributor
RS
Distributor part
number
EEUFR1E471
5000hr 1450mA
470uF 20% 25V 10*12
10000hr 1.7A P5.0
C916
RS
NRZJ471M25V10X12.5F
Connectors by manufacturer
Component
description
Location identifier
Component distributor Distributer part
number
USB 3.0 TYPE A R/A 18P CN103
DK
WM10420-ND
(0484060003)
732-3158-ND
H16.42MM
USB 3.0 TYPE B
CN7732
DK
（692221030100）
9
D-SUB
HDMI
CN503
CN502
DK
DK
WM12594-ND
(1731090066
1731090066)
SAM14939TR-ND
SAM14939CT-ND
SAM14939DKR-ND
(HDMR-19-02-S-SM-TR)
WM19271TR-ND
WM19271CT-ND
WM19271DKR-ND
(0472720001)
DP
CN501
DK
NOTE: Rear cover and chassis need to be modified to hold connector. Connector may need modifications to
meet functional, safety and regulatory requirements accordingly if it doesn’t match exactly.
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
10
4. Removal 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:
Rear cover
Before removing the rear cover, follow these steps:
▲
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Remove the Rear cover:
Step
Figure
Description
Remove the
hinge assy by
press the
Remove the
HINGE ASS'Y
hook on the
rear cover .
Remove the
rear cover
Remove the rear
cover
screws by the
screwdriver.
Remove the
rear cover
from the top
side
12
disconnect
the
connectors
.
Disconnect
the
connecters
Remove the mylar
Tear out all
tapes and
disconnect
the
connectors by
hand
13
Remove the power
board
Remove the
screws by the
screwdriver
Remove the
screws by the
screwdriver
Remove the main
board
Remove the
hex screws by
the hex
screwdriver
Remove the
screws by the
screwdriver
Remove the USB
board
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Remove the
screws by the
screwdriver
Remove the middle
frame
PANEL
Power board
The power board part number is PLPCJB391GQA3 .
Before removing the power board, follow these steps:
Remove the power board:
1) The HP E22 G4 power board connector position is as follows:
Warning : after unplug the power supply, the capacitance is still
chagred, do not touch and discharge the capacitor
Locate the part number location on the board.
15
Connector repair
This procedure includes HDMI, Display Port , USB and VGA connectors.
The connectors are on the main board (board part numberCBPCNA6H0FD).
The connectors identifiers are as follows:
Connector
Location
Display Port
HDMI
VGA
USB 3.0 TYPE B
USB 3.0 TYPE A
CN501
CN502
CN503
CN7732
CN103
Before repairing connectors, follow these steps:
IMPORTANT:
• Repair Condition: Connector repair is only for out of warranty.
16
• Repairing must operate by professional repairers (Note) in repair center, not applicable for end user.
• Electrostatic protection is required when component replacement is required.
• The monitor meets ROHS, please use Lead-free solder wire for soldering.
• If Connector need to replace, must check specification and part number whether match the BOM and
location.
• If connector need to replace, please insert new parts carefully because the near pin may cause short
circuit by inappropriate operate.
• DO NOT allow any liquid on the board. Water and moisture may cause short-circuit to the electronic
components and lead to malfunctions.
• The fusion point of Lead-Free solder is requested. Repairing with conventional lead wire may cause
damage.
• Work quickly to avoid overheating the circuit board as soon as you confirm the steady soldering condition.
• Keep the soldering iron tip clean and well tinned and when replacing parts.
• A close inspection of the circuit board revealed look in good condition.
• After repaired, must connect source to each port to check Main board function is ordinary.
Note: (The requirement of professional repairers’ regulation by ERP lot5)
1) The professional repairer has the technical competence to repair electronic displays and complies with the
applicable regulations for repairers of electrical equipment in the Member States where it operates. Reference
to an official registration system as professional repairer, where such system exists in the Member States
concerned, shall be accepted as proof of compliance with this point.
2) The professional repairer is covered by insurance covering liabilities resulting from its activity, regardless of
whether this is required by the Member State.
USB 3.0 TYPE B CN7732
Repair the usb 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 CN7732 out of the through holes.
2) Lift the CN7732 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.
17
USB 3.0 TYPE A CN103
Repair the audio 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 CN103 out of the through holes.
2) Lift the CN103 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.
VGA CN503
Repair the VGA connector:
3) 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 CN503 out of the through holes.
4) Lift the CN503 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.
HDMI connector CN502
Repair the HDMI connector:
18
1) Use a soldering iron and a desoldering pump to remove as much solder as possible from the pin.
2) Use a hot air gun to melt the solder on the pins.
3)Lift the CN502 connector from the PCB.
4) Place the new component on the PCB. Be sure that it matches the PCB footprint.
Solder the new component.
DP connector CN501
Repair the DP connector:
1)Use a soldering iron and a desoldering pump to remove as much solder as possible from the pin.
2) Use a hot air gun to melt the solder on the pins.
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3) Lift the CN501 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
Table 4-1: Function test
Test item
Operating description
Tool used
HDMI test
Confirm whether image displays and sound
plays correctly on the monitor
Computer or DVD player
DP test
Confirm whether image displays and sound plays
correctly on the monitor
Computer or DVD player
Speaker
Audio test
Change volume and balance to confirm whether
volume is smooth and loud enough
Support and troubleshooting
The following table lists possible problems, the possible cause or each problem, and the recommended solutions.
Table 4-2: Solving common problems
Problem
Possible cause
Solution
Screen is blank or Power cord is disconnected.
video is flashing.
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.
System is in Sleep mode.
Connect the video cable
properly.
Press any key on the keyboard
20
or move the mouse to exit
Sleep mode.
Video card is incompatible.
Brightness is too low.
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.
Open the OSD menu and
select Brightness to adjust the
brightness scale as needed.
Check Video Cable 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.
is displayed on
screen.
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, 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.
but it did not seem
to enter into Sleep
mode.
On-Screen Menus 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.
are Locked is
displayed.
Power Button is
Locked is
The monitor’s power button is locked.
Press and hold the power
button for 10 seconds to
disable the power button lock
function.
Displayed
21
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