Read LG 42LV5400 (CHASSIS:LA12E) Service Manual online
15. Trouble shooting - No audio (Head phone audio out)
Check Head phone Cable
for damage or open conductor
ok
ok
Check Earphone AMP Mute
(Pin 19)
Check Audio OSD
(Audio OSD active or inactive mode?)
Check R821 & R822, JK803
No(active)
Check Earphone output
(Pin 5, 16)
ok
No
Replace IC804 TPA6132A
ok
Follow procedure & refer to Audio signal block
Diagram
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