Read LG 42LC5DC (CHASSIS:LA65A) Service Manual online
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Digital TV Video Trouble Shooting
Check RF Cable
Check IIC Signal
TU101 #7, 8 Pin
Maybe Tuner(TU101) has
problems
Check LGDT1111D Output
Clock, Data, Sync
R846, R848, R849
Y
Y
N
Check Tuner 5V Power
IC1102 #3 Pin
Replace IC1102
Y
N
Y
Maybe LGDT1111D(IC803) has
problems
N
Maybe LGDT111D(IC803) has
problems
Check D805 color
Bad Tuner. Replace Tuner.
None
red
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