Failure Mode Of Lcd Panel - Philips 140S LCD Service Manual

10 140S LCD
9
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Quick reference for failure mode of LCD panel
This page presents problems that could be made by LCD panel. It is
not necessary to repair circuit board. Simply follow the "Mechanical
instruction" on this manual to eliminate failure by replace LCD panel
or backlight tubes.
Failure description
Vertical block defect
Vertical dim lines
Vertical lines defect
(Always bright or dark)
Horizontal block defect
Horizontal dim lines block
Horizontal lines defect
(Always bright or dark)
Has bright or dark pixel
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Failure Mode of LCD panel

Phenomenon
Bright pixel
. .
Dark pixel
. .
.. ..
. . . .
Polarizer has bubbles
Polarizer has bubbles
Foreign material inside
polarizer. It shows linear or
dot shape.
Concentric circle formed
Bottom back light of LCD is
brighter than normal
Backlight un-uniformity
Backlight has foreign
material. Black or white color,
linear or circular type
. .
. . . .
. . . .
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