Read LG 42LV5400 (CHASSIS:LA12E) Service Manual online
Check RF Cable & Signal
Check Tuner 3.3V Power
L2103
Replace L2103
Check Tuner 1.26V Power
IC2103 2 pin : 1.26V
Check IF_P/N Signal
TU2101 17,18 Pin
Replace IC2103
Check Tuner 5V Power
L2101,L2104
ok
ok
ok
ok
No
No
No
Bad Tuner. Replace Tuner.
Check IC507
No
Replace IC507
No
Replace L2101,2104
ok
9. Trouble shooting - No audio (Digital TV audio)
Follow procedure
‘8. All source audio’
trouble shooting guide.
ok
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