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B/L

open

B/L

down

F/M

wire

shut

Without backlight

B/L shutdown

sometime

F/M in

B/L ,white,batck

Rotundity or

wirelike

Operation abnormal or systemic noise

Short bitween lamp housing and wire, Because

consume power too much

F/M in B/L unit

Failure Mode

Part Name Description Phenomena Failure cause

Mechanical

or B/L

Light

leakage

Uniformity

Mount hole

Brightness at

bottom of LCM

brighter than

normal

B/L brightness

asymmetric

Lack screw or

screw damage

B/L unit badness

Sheet in B/L unit is uneven

*Lack screw

Screw damage

Haier HL42XR1 User Manual

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