Philips BDL4221V/00, Service Manual

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18 420WN6 LCD TV
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Failure description
Phenomenon
Vertical block defect
Vertical dim lines
Vertical lines defect
(Always bright or dark)
Horizontal block defect
Horizontal dim lines
Horizontal lines defect
(Always bright or dark)
Has bright or dark pixel
Polarizer has bubbles
Polarizer has bubbles
Foreign material inside
polarizer. It shows liner or
dot shape.
Concentric circle formed
Bottom back light of LCD is
brighter than normal
Back light un-uniformity
Backlight has foreign material.
Black or white color, liner or
circular type
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.
Failure Mode Of Panel