HP 734pm, 7 Pro Series Manual

Getting started

Read this chapter to learn about safety information and where to find additional HP resources.

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.

Monitor features

This chapter provides an overview of the monitor's features.

Features

Depending on the model, your monitor might include the following features:

Display features

• 86.4 cm (34 in) diagonal viewable screen area with 3440 × 1440 resolution (WQHD) or 95.3 cm (37.5 in) diagonal viewable screen area with 3840 × 1600 resolution (WQHD+), plus full-screen support for lower resolutions; includes custom scaling for maximum image size while preserving original aspect ratio
• Liquid crystal display (LCD) with active matrix and in-plane switching (IPS) Black Technology
• Wide color gamut to provide coverage of sRGB, Display P3, and BT.709 color spaces
• Nonglare 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
• Internal speakers up to 76 dB @ 200 Hz bass roll-off (WQHD) or 85 dB @ 160 Hz bass roll-off (WQHD+)
• Dual Picture-in-Picture (PiP) and Picture-by-Picture (PbP) functionality to enable the USB Type C® Thunderbolt™, DisplayPort™, or HDMI inputs to be viewed where one image is overlaid onto another (PiP) or where one image is positioned adjacent to another (PbP)
• Five on-screen display (OSD) buttons, four that you can reconfigure to quickly allow selection of the most commonly used operations
• On-screen display (OSD) adjustments in several languages for easy setup and screen optimization
• Color space presets for Display P3
• Pantone Validated
• Compatible with displays software including Device Bridge 2.0
• Plug and Play capability, if supported by your operating system
• Energy saver feature to meet requirements for reduced power consumption
• Security cable slot on the rear of the monitor for an optional security cable
• Cable management feature for placement of cables and cords

Connectors

• DisplayPort video input/output (cable included for select products only)
• High-Definition Multimedia Interface (HDMI) video input (cable included for select products only)
• USB Type-C Thunderbolt port (cable included)
• USB Type-C Thunderbolt DisplayPort output
• USB hub with one USB Type-C port that connects to the computer (upstream) and six USB ports that connect to USB devices (downstream) (USB Type-C–to–USB Type-A cable included for select products only)
• RJ-45 (network) jack

Monitor stand

• 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
• VESA® mounting bracket for attaching the monitor head to a wall-mount device or swing arm
• Support for a mounting bracket to attach the monitor to a workstation

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 Setup & User Guides.

Power board

The power board part number is 755.0AX11.D005.
Before removing the power board, follow these steps:

• Prepare the monitor for disassembly. See Preparation for disassembly.

Remove the power board:

1. The HP Series 7 Pro 734pm power board connector position is as follows:
   
2. Locate the part number location on the board.
   
3. Pin solder with soldering iron and absorber.
   NA
4. Lift the connector up and away from the PCB.
   NA

Connector repair

This procedure includes HDMI, Display Port, USB-C, TBT4, RJ45, USB-A connectors.
The connectors are on the main board (board part number 7ZB.0AX01.0008).
This procedure includes TBT4 connectors.
The connectors are on the TBT4 Board (board part number 755.0AX02.T001).
This procedure includes USB-A connectors.
The connectors are on the Sunk Board (board part number 755.0AX04.T001).
This procedure includes USB-A, USB-C connectors.
The connectors are on the Bottom Board (board part number 755.0AX03.T001)
The connector identifiers are as follows:

Before repairing connectors, follow these steps:

• Prepare the monitor for disassembly. See Preparation for disassembly.

HDMI connector HDMI1

Repair the HDMI connector:

1. Use a hot air gun to melt the solder on the pins from the bottom side.
2. Lift the HDMI 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.

DP connector DP1/DP2

Repair the DP connector:

1. Use a hot air gun to melt the solder on the pins from the bottom side.
2. Lift the DP 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.

USB-C connector USBC1/USBC2

Repair the USB-C connector:

1. Use a hot air gun to melt the solder on the pins from the bottom side.
2. Lift the USB-C 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

USB-C connector USBC3

Repair the USB-C connector:

1. Use a hot air gun to melt the solder on the pins from the bottom side.
2. Lift the USB-C 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

RJ45 connector

Repair the RJ45 connector:

1. Use a hot air gun to melt the solder on the pins.
2. Lift the RJ45 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.

USB-A connector USB1/USB2/USB3/USB4/USB5

Repair the USB-A connector:

1. Use a hot air gun to melt the solder on the pins from the bottom side..
2. Lift the USB-A 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.

Function test

After repair, be sure to confirm that all functions are working.
Table 4-1: Function test

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

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.

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.

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.