HP U28 User Manual

2
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.

HP U28 Specifications

General

Color depth	8 bit
Pixel pitch	0.116 x 0.116 mm
Screen shape	Flat
Pixel density	157 ppi
Display diagonal	28 \
Surface hardness	3H
Display technology	LCD
Native aspect ratio	16:9
Vertical scan range	30 - 60 Hz
Maximum refresh rate	60 Hz
Horizontal scan range	27 - 136 kHz
Display number of colors	-
Display brightness (typical)	400 cd/m²
Supported graphics resolutions	640 x 480 (VGA), 720 x 400, 800 x 600 (SVGA), 1024 x 768 (XGA), 1280 x 1024 (SXGA), 1440 x 900 (WXGA+), 1440 x 900, 1600 x 900, 1920 x 1080 (HD 1080), 2560 x 1440, 3840 x 2160
Pivot angle	-90 - 90 °
Tilt angle range	-5 - 23 °
Panel mounting interface	100 x 100 mm
USB hub version	3.2 Gen 1 (3.1 Gen 1)
DisplayPort version	1.2
USB Power Delivery up to	65 W
USB Type-A downstream ports quantity	3
HP segment	Home
Package depth	165 mm
Package width	824 mm
Package height	470 mm
Package weight	10450 g
Operating temperature (T-T)	5 - 35 °C
Operating relative humidity (H-H)	20 - 80 %
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (max)	155 W
Power consumption (standby)	0.5 W
Power consumption (typical)	45 W
Certification	MEPS; BSMI; CB; CCC; CE; CECP; CEL; EAC; ENERGY STAR®; FCC; ISO 9241-307; KC/KCC; NOM; PSB; SEPA; TCO Certified; TUV-S; UL/CSA; VCCI; Vietnam MEPS; WEEE; ISC; WW application; ICE
Product color	Silver
Country of origin	China
Sustainability certificates	CE, ENERGY STAR, TCO

Weight and Dimensions

Depth (with stand)	189.9 mm
Height (with stand)	531.4 mm
Weight (with stand)	6350 g
Depth (without stand)	43.4 mm
Width (without stand)	637.1 mm
Height (without stand)	371.2 mm