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B/L wire

open

Without backlight Operation abnormal or systemic noise

B/L shut

down

B/L shutdown in

sometime

Short bitween lamp housing and wire, Because

consume power too much

F/M

F/M in

B/L ,white,balck

Rotundity or

wirelike

F/M in B/L unit

Failure Mode

Part Name Description Phenomena Failure cause

Light

leakage

Brightness at

bottom of LCM

brighter than

normal

B/L unit badness

Uniformity

B/L brightness

asymmetric

Sheet in B/L unit is uneven

Mechanlcal

or B/L

Mount hole

Lack screw or

screw damage

*Lack screw

Screw damage

Haier HL42XK1 User Manual

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