diff --git a/conf/func_usbbtn.py b/conf/func_usbbtn.py
index 51ead72..7cee0fe 100644
--- a/conf/func_usbbtn.py
+++ b/conf/func_usbbtn.py
@@ -84,6 +84,7 @@ def __init__(self):
 
     def source_led_blink(self):
         while True:
+            print(source)
             if source == 'Tuner':
                 p = GPIO.PWM(TunerPin, 1000)   # set Frequece to 1KHz
                 p.start(0)                     # Duty Cycle = 0
diff --git a/main.py b/main.py
index bb252da..ad81e0f 100755
--- a/main.py
+++ b/main.py
@@ -58,20 +58,20 @@
 
 except (SystemExit):
     logger.info("Anwendung beendet")
-    destroy()
+    usbbtn.destroy_led_blink()
     exit()
 except (KeyboardInterrupt):
     logger.info("via Tastatur beendet")
-    destroy()
+    usbbtn.destroy_led_blink()
     exit()
 except Exception as e:
     logger.error("main crashed {0}".format(str(e)))
     logger.exception("Error")
-    destroy()
+    usbbtn.destroy_led_blink()
     raise
 except:
     logger.info("Unbekannter Fehler:", sys.exc_info()[0])
-    destroy()
+    usbbtn.destroy_led_blink()
     raise
 #    else:
 #        pass