LG 42LD465 Service Manual page 47

3. Analog TV Video
Check RF Cable & Signal
ok
Check Tuner 5V Power
L5002
ok
Check Tuner 3.3V Power
L5003
ok
Check Tuner 1.2V Power
IC5001 2 pin : 1.2V
ok
Check CVBS Signal
TU5001 11 Pin
ok
Check Mstar LVDS Output
Copyright ⓒ 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
No
Check IC401
No
Replace L5003
No
Replace IC5001.
No
Bad Tuner. Replace Tuner.
No
Replace Mstar(IC101) or Main Board.
No
Replace IC401
ok
Replace L5002
LGE Internal Use Only