Haier HL42XR1 service manual B/L unit, Part Name Description Phenomena Failure cause, Screw

B/L	wire
open	Without backlight
B/L	shut B/L	shutdown
down	sometime
	F/M		in
F/M	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
		Brightness		at
	Light	bottom	of LCM		unit badness
				B/L
	leakage	brighter	than

normal

Mechanical

B/L brightness

or B/L UniformitySheet in B/L unit is uneven asymmetric

Lack	screw or	*Lack	screw
Mount hole
screw	damage	Screw	damage

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