No Sound can be Heard from Speakers: Procedure

CHECK RADIO RECEIVER ASSEMBLY
1. Check the radio receiver assembly settings.
  1. Check that the volume is not set to "0".
  2. Check that "MUTE" is off.
    OK
    
    The volume is not set to "0" and "MUTE" is off.
NG → SYSTEM NORMAL (SET VOLUME UP OR SET MUTE TO OFF)

OK → See step 2
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE