Haier L42C1180 Service Manual page 27

5. Sound problem
No sound or sound abnormal
Check the audio source connection
and the TV system are correct?
Check the TV is muted, adjust the
volume or enter the menu to reset?
Enter factory mode to do "Reset"
Check the cable between the
speakers and main board is OK?
Check the speaker resistance value is in spec
(Remark: The value is marked on the speaker)?
Replace the speaker
Reinsert the audio cable or
Yes
change the TV system
No
No
Replace the cable
Yes
Replace the main board
Yes
27
No
No
No