Audio System Symptom Troubleshooting - Radio tuner does not change stations

Radio tuner does not change stations
  1. Check the audio information on the display panel.
Does the audio information display properly?
YES -
Go to Step 2 .
NO -
Go to power switch will not turn ON. ■
  1. Operate the tuning knob to see if the radio station changes.
Does the radio station change?
YES -
Intermittent failure: the tuning knob is OK at this time.■
NO -
Replace the audio unit.■