Trouble Shooting - No Video (Digital Tv Video) - LG 42LE5400 Service Manual

2. Trouble shooting - No video (Digital TV video)

Check RF Cable & Signal
ok
Check Tuner 5V Power
L700
ok
Check Tuner 3.3V Power
L701
ok
Check Tuner 1.2V Power
IC700 2pin : 1.26V
ok
Check IF_P/N Signal
TU700 17/18 Pin
ok
Check FRC and BCM LVDS Output
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Only for training and service purposes
No
Check IC8003
No
Replace L701
No
Replace IC700.
No
Bad Tuner. Replace Tuner.
Replace Mstar(IC9001) or BCM( IC900)
No
or Main Board.
No
Replace IC8003
Replace L8007
ok
LGE Internal Use Only