LG MT-42PM10 Service Manual page 25

6. In case of no sound
(1) Symptom
LED is green
¯
Screen display but sound is not output
¯
(2) Check follow
Is normal the SPK
cable?
Yes
Is normal the
RGB/DVI sound?
Yes
Is normal the
RF/AV/Component
sound?
No
Is the SPK cable
connected well?
No
Cable inserts well.
No
Is the Flat cable
connected well?
No
Cable inserts well.
No
Yes
Replace SPK cable
Yes
Operates the IC501?
No
Replace IC501
Replace
VSC Analog B/D
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Yes
Operates the IC502?
No
Replace IC502
Operates the IC502?
No
Replace IC504
Yes