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42LE5350 (CHASSIS:LA02D) - LG TV Service Manual (repair manual). Page 62

Read LG 42LE5350 (CHASSIS:LA02D) Service Manual online

Check RF Cable & Signal
Check Tuner 3.3V Power
L701
Replace L701
Check Tuner 1.2V Power 
IC700  2pin : 1.26V
Check IF_P/N Signal
TU700 17/18 Pin
Replace IC700.
Check Tuner 5V Power
L700
Check IC8003
Check FRC and BCM LVDS Output
Replace Mstar(IC9001) or BCM( IC900)
or Main Board.
ok
ok
ok
ok
ok
No
No
No
No
No
Replace IC8003
No
Bad Tuner. Replace Tuner.
Replace L8007
ok
2. Trouble shooting - No video (Digital TV video)
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