Haier HL42XR1 Service Manual page 54

Flashing
Bright and dark
display alternately
3.Pannel and vsc connect bad
Failure Mode
Part Name
White
Screen
Black
Screen
Circuit
Flicker
Abnormal
Color
Abnormal
Color
Description
B/L normal, only
white screen
display
B/L normal, only
Black screen
display
Crosstatk
Only color
abormal
Only color
abnormal
Phenomena
!
Failure cause
Maybe caused by surge current and EDS
LCD Vcom imbalance
Capacitance improper bring crosstalk inside LCD
pannel
1 .Chip lose action
2. IC short or jointion bad
3.Pannel and vsc connect bad
Failure Mode
Part Name Description Phenomena Failure cause
When turn
Mechanical Caused by Mechanica noise of backlight
panel,appear
Noise unit
cacophony
Ripple
B/L off
B/L dark
B/L wire
damaged
Connectric circle
B/L lose action
B/L brightness
darker than normal
B/L wire damaged
Causeed by between mechanism and
pannel
*Connect badness between
electrode
*Connectbadness
Shortbetween wire and electrode
Operation abnormal or systemic noise
wire and
54