Haier HL42XD1 Service Manual page 19

42 LCD TV
Abnormal Display
Check the source
OK
Check signal filter circuit
OK
Check input
OK
Check LVDS cable
OK
Check panel
No Sound
Check the source
OK
Check if mute
OK
Check input signal
Check U401
OK
Check U602
OK
Check speaker
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NG
Reset source
NG
RF signal
NG
Replace LVDS cable
NG
Replace panel
NG
Reset source
TV SIF
OK
Check TU201
NG
Change U401
NG
Change U602
NG
Change speaker
20
Replace the filter or resistance
OK
Check TV system setup
OK
Check Tuner
OK
Replace Tuner
Check TV
system
NG
Change TU201
Haier HL42XD1
NG
Reset TV system