diff --git a/mk/PX4/ROMFS/init.d/rc.APM b/mk/PX4/ROMFS/init.d/rc.APM
index 63f9fdd1c4..c7bc5f3e76 100755
--- a/mk/PX4/ROMFS/init.d/rc.APM
+++ b/mk/PX4/ROMFS/init.d/rc.APM
@@ -18,20 +18,6 @@ then
     sh /etc/init.d/rc.error
 fi
 
-# mount binfs so we can find the built-in apps
-if [ -f /bin/reboot ]
-then
-    echo "binfs already mounted"
-else
-    echo "Mounting binfs"
-    if mount -t binfs /dev/null /bin
-    then
-            echo "binfs mounted OK"
-    else
-            sh /etc/init.d/rc.error
-    fi
-fi
-
 set sketch NONE
 if rm /fs/microsd/APM/boot.log
 then
@@ -39,12 +25,6 @@ then
 fi
 set logfile /fs/microsd/APM/BOOT.LOG
 
-if [ ! -f /bin/ArduPilot ]
-then
-    echo "/bin/ardupilot not found"
-    sh /etc/init.d/rc.error
-fi
-
 if mkdir /fs/microsd/APM > /dev/null
 then
     echo "Created APM directory"
diff --git a/mk/PX4/ROMFS/init.d/rc.error b/mk/PX4/ROMFS/init.d/rc.error
index 8c82168ba5..92ba8b13a2 100644
--- a/mk/PX4/ROMFS/init.d/rc.error
+++ b/mk/PX4/ROMFS/init.d/rc.error
@@ -1,7 +1,5 @@
 echo "Error in startup"
 
-tone_alarm MNCC
-
 if [ $HAVE_RGBLED == 1 ]
 then
         rgbled rgb 16 0 0
diff --git a/mk/PX4/ROMFS/init.d/rcS b/mk/PX4/ROMFS/init.d/rcS
index 072c83561d..44d99c5816 100755
--- a/mk/PX4/ROMFS/init.d/rcS
+++ b/mk/PX4/ROMFS/init.d/rcS
@@ -24,17 +24,6 @@ echo "[init] looking for microSD..."
 if mount -t vfat /dev/mmcsd0 /fs/microsd
 then
     echo "[init] card mounted at /fs/microsd"
-    set HAVE_MICROSD 1
-    # Start playing the startup tune
-    if [ -f /etc/tones/startup ]
-    then
-        tone_alarm /etc/tones/startup
-    else
-        tone_alarm 1
-    fi
-else
-    set HAVE_MICROSD 0
-    tone_alarm MNBGG
 fi
 
 # Look for an additional init script that allows changing the default
@@ -75,24 +64,14 @@ else
     fi
 fi
 
-if [ $HAVE_MICROSD == 0 ]
-then
-    if usb_connected
-    then
-        echo "Opening USB nsh"
-    else
-        echo "booting with no microSD"
-        set HAVE_MICROSD 1
-    fi
-fi
-
 # if this is an APM build then there will be a rc.APM script
 # from an EXTERNAL_SCRIPTS build option
-if [ -f /etc/init.d/rc.APM -a $HAVE_MICROSD == 1 -a ! -f /fs/microsd/APM/nostart ]
+if [ -f /etc/init.d/rc.APM -a ! -f /fs/microsd/APM/nostart ]
 then
     echo Running rc.APM
     # if APM startup is successful then nsh will exit
     sh /etc/init.d/rc.APM
 else
+    echo "Opening USB nsh"
     nshterm /dev/ttyACM0 &
 fi
diff --git a/mk/PX4/ROMFS/init.d/rcS_no_microSD b/mk/PX4/ROMFS/init.d/rcS_no_microSD
index fd083d5c16..8ac04655d3 100644
--- a/mk/PX4/ROMFS/init.d/rcS_no_microSD
+++ b/mk/PX4/ROMFS/init.d/rcS_no_microSD
@@ -3,8 +3,6 @@ set USB autoconnect
 set NSH_ERROR_UART1 /dev/ttyACM0
 set NSH_ERROR_UART2 /dev/ttyS0
 
-tone_alarm /etc/tones/startup
-
 if sercon
 then
     echo "[init] USB interface connected"