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

3. Trouble shooting - No video (Analog TV video)

Check RF Cable & Signal
Check Tuner 5V Power
L700
Check Tuner 3.3V Power
L701
Check Tuner 1.2V Power
IC700 2 pin : 1.2V
Check CVBS Signal
TU700 11 Pin
Check FRC and BCM LVDS Output
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Only for training and service purposes
ok
No
ok
No
ok
No
ok
No
ok
No
No
Check IC8003
ok
Replace L701
Replace IC700.
Bad Tuner. Replace Tuner.
Replace Mstar (IC9001)
or BCM( IC900) or Main Board.
Replace IC8003
Replace L8007
LGE Internal Use Only