HP ZBook Studio G4 Base Model Mobile Workstation User Manual download pdf (Page 150)

Display Issue: Pixel Anomalies

All HP notebook displays adhere to strict quality and reliability specications. A small percentage of display

panels may have minor cosmetic manufacturing anomalies or irregularities such as bright or dark dots in the

viewable area. These cosmetic imperfections are common to all display panel types and are not specic to

any HP model or product line.

All display panel defects should be examined at the highest possible resolution using both the brightest and

darkest possible backgrounds, because some sub-pixel failures may not be readily visible under certain

conditions.

●

Type 1: Bright dot on a dark background = Always On

●

Type 2: Dark dot on a bright background = Always O

●

Combination = in any combination and any color that are always on or o

Use the HP PC Hardware Diagnostics (UEFI) tool to determine numbers of pixels and their distance. HP uses

the following set of criteria when damaged displays are submitted for warranty coverage.

Source: HP Notebook PCs and Tablets - About LCD Panel Defects and Terminology for Notebook PCs and

Tablets (http://support.hp.com/us-en/document/c00035844).

Table 6-7 Electrical defect allowances

Panel resolution Accept Reject

Sub-pixel faults

VGA, SVGA, SD, WSVGA, XGA, 720p, SD+, WXGA, HD N ≤ 2 Type 1

N ≤ 2 Type 2

N ≥ 3 Type 1

WXGA+, SXGA+, HD+, SXGA+ N ≤ 3 Type 1

N ≤ 3 Type 2

N ≥ 4 Type 1

WSXGA+, UXGA, FHD, WUXGA N ≤ 4 Type 1

N ≤ 4 Type 2

N ≥ 5 Type 1

QHD, QHD+, WQXGA, UD N ≤ 5 Type 1

N ≤ 5 Type 2

N ≥ 6 Type 1

Electrical defect clusters (defects within a 5x5 pixel block)

Minimum distance between ANY allowable defects (unless otherwise specied) S ≥ 25 mm S < 25 mm

Cluster with 2 or more sub-pixels with sub-pixel faults Not allowed

Dim lines Not allowed

Cross line(s) on/o Not allowed

Horizontal line(s) on/o Not allowed

Vertical line(s) on/o Not allowed

NOTE: All LCD panel defects should be examined at the highest possible resolution using both the brightest

and darkest possible backgrounds, as some sub-pixel failures may not be readily visible under certain

conditions.

NOTE: Contact support for assistance if issues are not listed.

138 Chapter 6 Troubleshooting guide

1 2 ... 145 146 147 148 149 150 151 152 153 154 155 ... 181 182

Comments to this Manuals

No comments

HP ZBook Studio G4 Base Model Mobile Workstation User Manual Page 150

Comments to this Manuals

Related products and manuals for Laptops HP ZBook Studio G4 Base Model Mobile Workstation