           case 7: {
             if ((backlightIntensity + 10) <= 255) {
               backlightIntensity += 10;
-              analogWrite(backLightPin, backlightIntensity);
+              analogWrite(BACKLIGHT_PIN, backlightIntensity);
               EEPROM.write(3, backlightIntensity);
             }
             break;

  }
}

int read_LCD_buttons(){
  int adc_key_in = analogRead(0);
  if (adc_key_in > 1000) return btnNONE; 
  if (adc_key_in < 50) return btnRIGHT; 

        switch (applicationState) {
          //Volume UP
          case 0: {
            digitalWrite(UPDOWN_PIN, HIGH);
            digitalWrite(INC_PIN, LOW);
            delay(DELAY_VOLUME_TRANSITION);
            digitalWrite(INC_PIN, HIGH);
            delay(DELAY_VOLUME_TRANSITION);
            break;
          }
