Samsung PS42B451B2WXXU Service Manual page 40

Troubleshooting
■ ■ No Sound (42")
Symptom - Video is normal but there is no sound.
- When the speaker connectors are disconnected or damaged.
Major Checklist - When the sound processing part of the Main Board is not functioning.
- Speaker defect.
Troubleshooting
Procedures
4-8
Is the cable connection between the
①
Main Board and the speaker
properly connected?
Yes
Is the output voltage of SMPS normal?
②
(CN801 #13)
Yes
Is the speaker output terminal
of the Main Board normal?
Yes
③
Replace the Speaker
No
Connect the cable properly or
replace the cable, if necessary.
No
Replace the SMPS
No
Replace the Main Board
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