Haier LTF42M1C Service Manual page 32

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 U400
OK
Check U600
OK
Check speaker
NG
Reset source
Replace the filter or resistance
NG
RF signal
NG
Replace LVDS cable
NG
Replace panel
NG
Reset source
TV SIF
OK
Check TU201
NG
Change U400
NG
Change U600
NG
Change speaker
32
OK
Check TV system setup
OK
Check Tuner
OK
Replace Tuner
Check TV
system
NG
Change TU201
NG
Reset TV system