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Black
Screen
FIIcker
Abnormal
Color
Abnormal
Color
Failure Mode
Part
Name
Mechanlcal
Nolse
Ripple
B/L off
B/L dark
B/L
wire
damaged
B/L
wire
open
B/L
shut
down
B/L normal, only
Black
screen
display
Crosstalk
Only
color
abnormal
Only
color
abnormal
Description
When
turn
panel,appear
cacophony
Connectric circle
B/L lose action
B/L
brightness
darker than normal
B/L wire damaged
Without backlight
B/L shutdown in
sometime
LCD Vcom imbalance
Capacitance improper bring crosstalk inside LCD
panel
1. Chip lose action
2. IC short or joint bad
3. Panel and VSC connect bad
Phenomena
Caused by Mechanica noise of backlight
unit
Causeed by between mechanism and
Panel
*Connect badness between wire and
electrode
*Connect badness
Short between wire and electrode
Operation abnormal or systemic noise
Operation abnormal or systemic noise
Short between lamp housing and wire, Because
consume power too much
54
Failure cause
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