LG GS290 Service Manual page 73

GS290 Operational Description
4. TROUBLE SHOOTING
START
Check Speaker 's
Combination with PCB.
Yes
Input Signal is
Good(C364,C365
) ?
Yes
Output Signal is
High(C343,C342)
?
Yes
Assemble
LG Electronics
LGE Internal Use Only
No
Connect Speaker
completely.
No
Replace Main Board
No
Replace Audio
AMP(U304)
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Revision B