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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.

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.

Prepare the machine for rework, take a protective pad, and place the machine on the protective pad.

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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