No Sound - Samsung PA43H4100AR Service Manual

4. Troubleshooting

4.2.3. No Sound

• Video is normal but there is no sound.
When the speaker connectors are disconnected or damaged.
•
When the sound processing part of the Main Board is not functioning.
•
Speaker defect.
•
SMPS not supplying voltage to the main board
•
Is the cable connection between Main board and
the speaker properly connected?
Is the output voltage of SMPS normal?
(CN804 pin #4 : 15VS)
4-7
Symptom
Major checkpoints
Diagnostics
Connect the cable properly or replace the
Copyright© 1995-2013 SAMSUNG. All rights reserved.
cable, if necessary.
Replace the SMPS.