LG 42LC2RR Service Manual page 24

2. Time shift sound and Recorded video sound
(1) Symptom
SOUND doesn't come out.
Ø
(2) Check following
MUTE key on
No
Is sound cable right?
No
Connect the speak cable.
Is sound right?
3. Recorded video
(1) Symptom
Can't play the recorded video.
Ø
(2) Check following
Check 31pin flat cable.
Is it right?
Yes
check 40pin, 4pin HDD cable.
Is it right?
No
Connect cable well
Yes
Turn off the mute Key
Yes
Are power cables
connected well.
No
No
Connect 31pin well.
Yes 1
Yes 2
Check U11, U1 U7
Is it right?
Check 2068(IC1206).
Is it right
Change the HDD
Is it right.
No
Yes
Is 31pin cable right?
Check speakers.
Are they right?
Check U13, U14, U1, U7.
Check MSP(IC406), IC404.
Is it right?
Remove the recorded lists
and record one more time
and play again.
Is it right?
No
No
No
Change the Board
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No
Connect 31p cable.
Yes
No
Connect 31pin cabel.
Yes
No
Change the ICs
Is it right?
Yes
Change the Board
No
No