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  Display Problem  
 

Fuzzy text, blurry or stretched images

Blurry Display

Figure 1: Blurry Display

Correct display

Figure 2: Correct Display

Stretched Image

Figure 3: Stretched Image

Correct display

Figure 4: Correct Display

Screen shrinks when connected to external display

External display

Figure 5: Example of black bars and screen shrinking

 

A small dot is too bright or black

small dot

Figure 6: Example of pixel defects in the display panel

 

Black or blank screen

black screen

Figure 7: Blank screen

 

Screen flickers, lines appear or incorrect colors

flickering screen

Figure 8: Flickering Screen

Vertical lines

Figure 9: Vertical lines in the display

Solid horizontal green line

Figure 10: Solid horizontal green line

Incorrect colors

Figure 11: Incorrect colors

Broken or physically damaged screens

Horizontal and Vertical lines

Figure 12: Horizontal and Vertical lines

Diagonal or jagged lines

Figure 13: Diagonal or jagged lines

Examples of Customer Induced Damage (CID)

CID Defect Description Example of damaged LCD Panel
Diagonal or jagged lines and/or the presence of both horizontal and vertical lines. Diagonal or jagged lines (white area in 1) and both horizontal and vertical lines indicate panel damage. One set of either horizontal or vertical lines may be a damaged panel, but can also be caused by graphics system failure or a loose internal video cable. Diagonal jagged lines
Discolored, lightened, or darker area in screen Liquid has entered inside the display panel. Discolored
White spots or lightened localized areas Lighter areas or white spots visible on the screen. This typically happens when a sharp object or edge forcefully contacts the display screen. White spots
Black "splotches" or "blotches" with bright white areas exposed The internal glass has cracked allowing liquid crystal to pool into areas (the black blotches). When this happens, the areas void of liquid crystal are bright white. splotches
Black splotches cutting through the screen The internal glass has cracked and liquid crystal is leaking (sometimes call bleeding) inside the display panel along the crack. Black splotches
Broken glass. In extreme cases, the broken glass may be visible, as well as black and white blotches. Broken glass

 

Clean the display
LCD screens accumulate smudges and scratches all the time. To clean these, choose a non-abrasive cloth or towel. Plastic and glass cleaners containing ammonia may leave a glare-causing film, so use a computer monitor specific cleaner from a computer store. Spray the cleaner onto the cloth, then wipe the screen with it.
LCD panel quality
All notebook LCDs adhere to strict quality and reliability specifications. A small percentage of LCD 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 LCD panel types and are not specific to any model or product line.
Definition of LCD terms
Pixel Picture element. A pixel consists of 1 red (R), 1 green (G), and 1 blue (B) sub-pixel, each of which are commonly referred to as dots.
Dot Elements that make up a pixel. Dots are one of three colors; R, G, or B. Sub-pixel transistor or dot failures may appear in several different ways.
Always On Bright dot on a dark background.
Always Off Dark dot on a bright background.
Spot A spot generally refers to an optical distortion due to foreign material contamination inside the cell. Spots are usually seen as small irregular dark areas.
Lines Lines appearing in the display pattern of the LCD. Lines may appear dark or bright and may be displayed in a horizontal or vertical position.
Polarizer dent Physical damage to the Polarizer, which does not damage the glass. Dents may be observed when the LCD is illuminated and may appear as ghosted white lines or with dark display patterns. Polarizer dents are most likely to appear as pockmarks caused by a strike to the display.
Polarizer bubble Tiny air pockets behind the Polarizer.
Polarizer scratch Physical damage to the Polarizer that does not damage the glass.

Tag: lcd size price quality

 
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