No Sound - Samsung PS42E7SX Service Manual

6-2-4 No Sound

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 out of order.
- Speaker defect.
Troubleshooting
Procedures
Samsung Electronics
Is the cable connection between
the Main Board and the speaker
properly connected?
Is the output voltage of SMPS
normal? (CN803 #5)
Is the speaker output terminal
of the Main Board normal?
Replace the Speaker
Connect the cable properly or
replace the cable, if necessary.
Replace the Main SMPS
Replace the Main Board
Troubleshooting
6-5