19LV2500-ZG, 19LV250A-ZG, 19LV250N-ZG, 19LV250U-ZG (CHASSIS:LD01R) - LG TV Service Manual (repair manual). Page 21

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12. AV Audio
Check AV Cable for damage
for damage or open conductor.
Check JK1604 & Signal Line.
ok
ok
No
Replace Jack.
Follow procedure 
’9. All source audio’
trouble shooting guide.
13. Component/ SCART Audio
Check Component Cable
for damage or open conductor.
Check JK1602, JK1603 
& Signal Line.
ok
ok
No
Replace Jack.
Follow procedure 
’9. All source audio’
trouble shooting guide.
14. RGB Audio
Check Cable conductors
for damage or open conductor.
Check JK1102 & Signal Line.
ok
No
ok
Replace Jack.
Follow procedure 
’9. All source audio’
trouble shooting guide.
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