This document pertains to all HP and Compaq LCD Monitors, HP TouchSmart PCs, and All-in-One PCs flat panel display monitors manufactured from 2003 and on.
note:This article does not pertain to display hardware in notebook computers.
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HP and Compaq LCD Monitors, HP TouchSmart PCs, and All-in-One PCs - HP Pixel Policy
Understanding 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's monitor specification.
A sub-pixel defect is also referred to as a dot defect.
Bright dot sub-pixel defects are permanently "on", displaying a colored red, green, or blue 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.
A different type of defect caused by microscopic contaminants within the manufacturing process can also be found. Contamination results in a dark "stain" covering one or several sub-pixels. They are not pixel or sub-pixel defects per say. No contamination is allowed under HP policy.
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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.
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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.
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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.
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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:
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Bright sub-pixel defects
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2 maximum
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Dark sub-pixel defects
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5 maximum
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Total combined bright and dark sub-pixel defects
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5 maximum
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Full Pixel Defects pixel defects:
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0 allowed
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Policy for HP monitors and All-in-One PCs manufactured before May 2009:
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Bright sub-pixel defects
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3 maximum
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Dark sub-pixel defects
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5 maximum
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Total combined bright and dark sub-pixel defects
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5 maximum
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Full Pixel Defects pixel defects:
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0 allowed
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The manufacture date can be found 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):
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Z22n
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Z24x
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Z34c
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Z22n G2
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Z24x G2
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Z38c
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Z23n
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Z25n
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HC240
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Z23n G2
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Z27i
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HC240 GEHC
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|
Z24i
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Z27n
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HC241
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|
Z24i G2
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Z27n G2
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HC241p
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|
Z24n
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Z27q
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HC270
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|
Z24n G2
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Z27s
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HC270cr
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Z24nf
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Z27x
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HC271
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Z24nf G2
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Z30i
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HC271p
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Z24nq
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Z31x
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Z24s
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Z32x
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Bright sub-pixel defects
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0 maximum
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Dark sub-pixel defects
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4 maximum
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Total combined bright and dark sub-pixel defects
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4 maximum
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Full Pixel Defects pixel defects:
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0 allowed
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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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