Read LG 55LEX8-SA (CHASSIS:LJ03S) Service Manual online
Check RF Cable & Signal
Check Tuner 3.3V Power
L701
Replace L701
Check Tuner 1.2V Power
IC700 2 pin : 1.26V
Check IF_P/N Signal
TU701 20,21 Pin
Replace IC700
Check Tuner 5V Power
L700
ok
ok
ok
ok
No
No
No
Bad Tuner. Replace Tuner.
Check IC8003
No
Replace IC8003
No
Replace L8007
ok
12. Trouble shooting - No audio (Digital TV audio)
Follow procedure
‘8. All source audio’
trouble shooting guide.
ok
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