diff --git a/scripts/beamerdetect.sh b/scripts/beamerdetect.sh
index 31993d0..f6bad37 100755
--- a/scripts/beamerdetect.sh
+++ b/scripts/beamerdetect.sh
@@ -2,16 +2,23 @@
 if [ "$1" = "off" ]
 then
   (
+  echo "called with parameter $1"
   projip=$(arp -an|awk -F'[()]' '/00:50:41:79:d1:34/{print $2}')
+  if [ "$projip" = "" ]
+  then
+    echo "no projector IP found"
+    arp -a
+    exit
+  fi
   signalsource="$(wget -qO - 'http://'"$projip"'/tgi/return.tgi?query=info' |awk -F'[<>]' '/<info>/{print substr($3,33,2)}')"
   if [ "$signalsource" = "00" ] || [ "$signalsource" = "15" ] || [ "$signalsource" = "" ]
   then
     ssh pi@doorbuzz 'doorbuzz/projectionscreen.sh up'
-    echo "wget http://$projip/tgi/return.tgi?command=2a3102fd0660"
+    echo "wget http://$projip/tgi/return.tgi?command=2a3102fd0660 #projector off"
     wget -qO - 'http://'"$projip"'/tgi/return.tgi?command=2a3102fd0660' 2>&1 
     echo $? 
   else
-    echo "not disabling projection because source is at $signalsource" 
+    echo "not disabling projector because source is at $signalsource" 
   fi
   ) | logger -t "$(basename $0) $$"
   exit
diff --git a/scripts/lockbutton.sh.d/projector.sh b/scripts/lockbutton.sh.d/projector.sh
index 113ef47..b10ab90 100755
--- a/scripts/lockbutton.sh.d/projector.sh
+++ b/scripts/lockbutton.sh.d/projector.sh
@@ -1,2 +1,5 @@
 #!/bin/bash
-$(dirname $0)/../beamerdetect.sh off
+if [ "$1" = "pushed" ]
+then
+  $(dirname $0)/../beamerdetect.sh off
+fi