home security alarm system repair

[erstlingnole@xxxxxxx]

There is an alarm system from ranger american that was installed in my
home by the previous owners and there are a few windows that do not
seem to arm when open or close.  All the other windows work. The
hardware looks still intact on each window. The contact points appear
to line up when the windows are closed.  Any suggestions on repair??
other than calling a technician. thanks