       Serial.println("°C");
       break;
     case '8':
+      Serial.println(F("Reading first 100 characters from EEPROM:"));
       for (help=0;help<100;help++)
         Serial.print(char(readDisk(Disk1,help)));
       Serial.println();
       break;
     case '9':
+      Serial.println(F("Reading owner name and email address:"));
       for (help=20;help<80;help++)
         Serial.print(char(readDisk(Disk0,help)));
       Serial.println();
       break;
     case 'a':
-      Serial.println("Will follow...");
+      Serial.println(F("Display should turn off and on..."));
+      Wire.beginTransmission(lcd_address);
+      Wire.write(0x00);
+      Wire.endTransmission();
+      delay(500);
+      Wire.beginTransmission(lcd_address);
+      Wire.write(0x08);
+      Wire.endTransmission();
       break;
     case 'b':
+      if (!amp) Serial.println(F("Warning: Amplifier is off!"));
+      Serial.println(F("Playing file number 70..."));
       mp3.write("\x7E\x04\x03\x01");     // Play file number 
       mp3.write(70);                     // 70
       mp3.write("\xEF");

      mp3.write("\x7E\x02\x0D\xEF");     // Play
      break;
  }
  delay(1000);
  Serial.println("\nDone.\n");
}


      amp=!amp;
      break;
    case '3':
      Serial.println(F("Setting AUX (D7) High. Send Space to stop."));
      while(Serial.available()==0) digitalWrite(7,HIGH);
      digitalWrite(7,LOW);
      break;
    case '5':
