HP P19b G4 Manual

Maintenance and Service Guide
P19b G4&V19&V20&P204v 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.
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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: July 2021
Document Part Number:
M01029-V20-MSG-V1
Assembly part number:
M01029-001 /L96284-001/ L95410-001/
L47851-001
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
Rear components ................................................................................................................................................... 5
Locating the serial number and product number .................................................................................................. 6
3Illustrated parts catalog ............................................................................................................................................ 11
How to order parts ............................................................................................................................................... 13
4Removal and replacement procedures ...................................................................................................................... 14
Preparation for disassembly................................................................................................................................ 14
Rear Cover ............................................................................................................................................................ 14
Power board ......................................................................................................................................................... 18
Connector repair .................................................................................................................................................. 19
VGA connector CN201............................................................................................................................... 20
HDMI connector CN301............................................................................................................................. 21
VGA connector CN201............................................................................................................................... 22
Function test ........................................................................................................................................................ 22
Function test ........................................................................................................................................................ 22
Support and troubleshooting .............................................................................................................................. 22
Index..................................................................................................................................................................... 24

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:
●47 cm (18.5-inch) diagonal viewable screen area with 1366 x 768 resolution, plus full-screen support
for lower resolutions; includes custom scaling for maximum image size while preserving original
aspect ratio
●49.5 cm (19.5-inch) diagonal viewable screen area with 1600 x 900 resolution, plus full-screen
support for lower resolutions; includes custom scaling for maximum image size while preserving
original aspect ratio
●Anti-Glare panel with an LED backlight
●Wide viewing angle to allow viewing from a sitting or standing position, or when moving from side to
side (select products only)
●Tilt capability
●VGA video inputs (select products only)
●HDMI (High-Definition Multimedia Interface) video input (select products only)
●Plug-and-play capability if supported by your operating system
●Cable management feature for placement of cables and cords
●Security cable slot on the rear of the monitor for an 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 (HDMI model
only)
●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.

4
Button components
To identify the components on the front of the monitor, use this illustration and table.
Back of monitor showing locations of controls
Table 1-1: Button components and their descriptions
Component
Function
1
Menu/Select
Opens the OSD menu or selects items on the OSD
menu.
2
Auto Adjustment /Minus
Auto Adjustment: If the OSD menu is inactive, press
to do an auto adjustment from a VGA.
Minus: If the OSD menu is open, press to navigate
backward through the OSD menu and decrease
adjustment levels.
3
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.
5
Brightness /Exit
Brightness: If the OSD menu is inactive, press to
activate the Brightness to adjust brightness.
Exit: If the OSD menu is open, press to save any
changes made, and exit the OSD menu.
5
Power button
Turns the monitor on or off.

5
Rear components
To identify the components on the rear of the monitor, use this illustration and table.
V19
Rear component location showing of V19
Table 1-2: Rear components and their descriptions
Component
Function
1
Power connector
Connects the power cable to the monitor
2
VGA connector
Connects a VGA cable to the source device.
3
Security cable slot
Connects an optional security cable
P19b G4 & V20/P204v
Rear component location showing of P19b G4 Rear component location showing of V20/P204v
Table 1-3: Rear components and their descriptions
Component
Function
1
Power connector
Connects the power cable to the monitor
2
HDMI connector
Connects an HDMI cable to the source device.
3
VGA connector
Connects a VGA cable to the source device.
4
Security cable slot
Connects an optional security cable

6
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 (except India):
V19
Spec label
Spec label for Worldwide region of V19
Barcode label

7
Barcode label for Worldwide region of V19
Barcode label for India region of V19
P19 G4
Spec label
Spec label for Worldwide region of P19b G4

8
Barcode label
Barcode label for Worldwide region of P19b G4
Barcode label for India region of P19b G4
V20
Spec label
Spec label for Worldwide region of V20

9
Bar code label
Barcode label for Worldwide region of V20
Barcode label for India region of V20
P204v
Spec label
Spec label for Worldwide region of P204v

10
Bar code label
Barcode label for Worldwide region of P204v
Barcode label for India region of P204v

11
3Illustrated parts catalog
To identify the monitor major components, use this illustration and table.
P19b G4 and V19
Mechanical explosion of P19b G4 and V19
Item
Description
Qty
1
ASSY, BEZEL, P19bG4 (/ V19)
1
2
Panel (TBC)
1
3
SCREW, P, CROSS M3*6, ZN-CC
5
4
MYLAR, PWR to Panel, V19
1
5
ASSY, CHASSIS,1A1H, P19bG4 (/ VGA, V19)
1
6
ASSY, BUCKET, INX, P19bG4
1
7
SCREW, I, CROSS, M4*10, BLK-NL
4
8
ASSY, STAND ARM, P19bG4
1
9
ASSY, STAND BASE, P19bG4
1
10
Keypad (TBC)
1
11
MYLAR, CHASSIS BOTTOM, V19
1
12
PCBA PWR (TBC)
1
13
PCBA IF (TBC)
1
14
SCREW, PW, CROSS M4X9, Zn-CC
1

12
V20/P204v
Mechanical explosion of V20
Item
Description
Qty
1
SCREW, I, CROSS, M4*10, BLK-NL
4
2
ASSY, BUCKET, CMI, P204v
1
3
Keypad (TBC)
1
4
MYLAR, CHASSIS MAIN, P174, TOP 2
1
5
ASSY, CHASSIS, P204v
1
6
MYLAR, POWER BOARD AND PANEL, P174
1
7
SCREW, P, CROSS M3*6, ZN-CC
5
8
PANEL (TBC)
1
9
ASSY, BEZEL, CMI, P204
1
10
RUBBER FOR LENS, BLACK, P204, HF
1
11
SCREW, PW, CROSS M4X9, Zn-CC
1
12
PCBA PWR (TBC)
1
13
MYLAR, CHASSIS SAFETY 1, ISLAND, P174
1
14
PCBA IF (TBC)
1
15
MYLAR, CHASSIS SAFETY 2, ISLAND, P174
1
16
SCREW I CROSS T-T2*4 LE14JT-71L HF
2
17
ASSY, STAND BASE, P204
1
18
ASSY, STAND ARM, P204
1

13
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, LP19S5-
D18/P19b G4/R
M84525-001
790RP1400D00R01
P19b G4-BOE
PCBA, PI/BD, W/OSPK, LP19S5-
618/P19b G4/R
M84526-001
790RP1400600R01
P19b G4-INL
PCBA, PI/BD, W/OSPK, LP19S4-
D10/P19v G4/R
M94076-001
790RM1400D00R01
V19-BOE
PCBA, PI/BD, W/OSPK, LP19S4-
610/P19v G4/R
M94076-002
790RM1400600R01
V19-INL
PCBA, PI/BD, W/OSP, LE20RQ-
71G/P204v/HF/ES8
M90741-001
790QF1400701H01
V20/P204v-AUO
PCBA, PI/BD, W/OSP, LE20RQ-
61G/P204v/HF/ES8
M90742-001
790QF1400601H01
V20/P204v-INL
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
C873
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
CN301
Farnell
208658-1051
VGA Port
CN201
Digi-Key
193-015-213R531-ND
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.

14
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 14.
Remove the Rear Cover of P19b G4&V19:
1) Remove four screws from the rear case.

15
Remove the rear cover screws
2) Insert the scraper bar tool into the gap between the front bezel and rear case. The hook opens. Repeat the
steps.
Separate the front bezel and rear case
3) Turn over rear cover and disconnect the terminal.
Separate the cable
4) Peel off the cable from rear cover, unfix two screws.
Separate keyboard from rear cover
5) Peel off all aluminum foils and tapes, disconnect the cables.

16
Separate taps and cable
6) Take out chassis and panel.
7) Take away the mylar. Unscrew two bolts and six screws.
Separate screws from PCBA board
8) Take out power board and IF board, and then disconnect the terminals
.
Separate PCBA from chassis
Remove the Rear Cover of V20/P204v:
1) Remove four screws from the rear case.
Remove the rear cover screws
2) Insert the scraper bar tool into the gap between the front bezel and rear case. The hook opens. Repeat the
steps.