Read LG 42CQ610H (CHASSIS:LA1EZ) Service Manual online
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3. Analog RF Video Trouble Shooting guide
Check RF cable & signal
Y
Check TU1003 Pin7
(Video output)
Y
Check tuner 5V power L3702
Y
Check tuner 3.3V power L3703
Y
Check tuner 1.8V power IC3703
2pin : 1.8V
Y
Check Mstar LVDS output
Replace Tuner.
N
Check IC404
Replace L3703
Replace IC3703
N
N
N
Replace IC101
N
Replace IC404
N
Y
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