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HP and Compaq LCD monitors, HP TouchSmart PCs, and HP All-in-One PCs - HP Pixel Policy

Use this information to learn about HP Pixel Policy for display monitors manufactured in 2003 and on.

Note:

This article does not pertain to display hardware in notebook computers.

Understanding pixel and sub-pixel defects

Use this information to learn about pixel and sub-pixel defects.

What is a pixel?

Short for picture element, a pixel is a single point in a graphic image. HP TouchSmart PCs, All-in-One PCs, and LCD flat panel monitors display pictures by dividing the display screen into thousands (or millions) of pixels, arranged in rows and columns. The pixels are placed close together so that they appear connected.

A full pixel is a combination of one red, one green, and one blue sub-pixel.

What are pixel and sub-pixel defects?

A full pixel defect is a bright white dot or very noticeable black dot on the display. No full pixel defects are allowed per HP monitor specification.

A sub-pixel defect is also referred to as a dot defect.

Bright dot sub-pixel defects are permanently "on," displaying a red, green, or blue-colored spot on the display at all times.

Dark dot sub-pixel defects are permanently "off," displaying a black dot on the display at all times.

Identifying a dark sub-pixel defect

A different type of defect that can occur is caused by microscopic contaminants within the manufacturing process. Contamination results in a dark "stain" covering one or several sub-pixels. They are not pixel or sub-pixel defects, per se. No contamination is allowed under HP policy.

Dark sub-pixel defect: In this image, a dark spot on a white background results from a green sub-pixel, which is in the "off" or dark state.

Bright sub-pixel defect: In this image, a bright spot on a black background is caused by sub-pixels (in this case, a red sub-pixel) in the "on" state.

Identifying a bright sub-pixel defect

Debris trapped within the LCD structure can result in dark spots, but under magnification these are distinguished from an "off" sub-pixel, as the shape of the contaminating particle is visible.

Identifying debris trapped within the LCD structure

Understanding HP pixel policy

The policy that applies to your monitor depends on the date of manufacture of your display.

The following policies apply during the HP limited warranty period:

Policy for HP monitors and All-in-One PCs manufactured in May 2009 or later

Defect type

Detects allowed

Bright sub-pixel defects

2 maximum

Dark sub-pixel defects

5 maximum

Total combined bright and dark sub-pixel defects

5 maximum

Full Pixel Defects

0 allowed

Policy for HP monitors and All-in-One PCs manufactured before May 2009

Defect type

Defects allowed

Bright sub-pixel defects

3 maximum

Dark sub-pixel defects

5 maximum

Total combined bright and dark sub-pixel defects

5 maximum

Full Pixel Defects

0 allowed

You can find the manufacture date on a label adhered to the back of the monitor or All-in-One PC.

HP’s Zero Bright Dots Guarantee for Performance Displays

For most HP Performance displays, HP guarantees zero bright dots.

This policy applies to the products listed in the following table (regardless of manufacture date):

HP Performance Displays

Model

Model

Model

Z22n

Z24x

Z30i

Z22n G2

Z24x G2

Z32x

Z23n

Z25n

Z34c

Z23n G2

Z25xs G3

Z38c

Z24f G3

Z27i

Z31x

Z24i

Z27k G3

HC240

Z24i G2

Z27n

HC240 GEHC

Z24n G3

Z27n G2

HC241

Z24n G2

Z27q G3

HC241p

Z24nf

Z27s

HC270

Z24nf G2

Z27u G3

HC270cr

Z24zq

Z27x

HC271

Z24s

Z27xs G3

HC271p

Z24u G3

HP’s Zero Bright Dots Guarantee for Performance Displays

Defect type

Defects allowed

Bright sub-pixel defects

0 maximum

Dark sub-pixel defects

4 maximum

Total combined bright and dark sub-pixel defects

4 maximum

Full Pixel Defects

0 allowed

Note:

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.


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