diff --git a/obsolete-buildroot/sources/openwrt/root/etc/preinit b/obsolete-buildroot/sources/openwrt/root/etc/preinit
index 1500f194ee..6e6a9c998a 100755
--- a/obsolete-buildroot/sources/openwrt/root/etc/preinit
+++ b/obsolete-buildroot/sources/openwrt/root/etc/preinit
@@ -7,6 +7,7 @@ echo 0x01 > /proc/sys/diag
 sleep 1
 if [ $(cat /proc/sys/reset) = 1 ] ; then
   export FAILSAFE=true
+  while :; do { echo $(((X=(X+1)%8)%2)) > /proc/sys/diag; sleep $((X==0)); } done &
 else
   mtd unlock mtd4
   mount -t jffs2 /dev/mtdblock/4 /jffs