LG 32LT670H-UA Service Manual page 17

Analog RF Video Trouble Shooting guide
Check RF cable & signal
Y
Check TU3001 Pin7
(Video output)
Y
Check tuner 5V power L3000
Y
Check tuner 3.3V power L3001
Y
Check tuner 1.8V power IC3000
2pin : 1.8V
Y
Check Mstar LVDS output
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Only for training and service purposes
N
Replace Tuner.
Y
N
Check IC5000
N
Replace L3001
N
Replace IC3000
N
Replace IC101
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N
Replace IC5000
LGE Internal Use Only