I would imagine that if there's no pa's fitted then the appropriate action would of been carried out at the pcb by the installer.
Chances of this becoming loose or dropping and causing an open circuit are slim to say the least,
Nicks right about the diodes too,red on the accenta's not green as this poster says,
I think this individual posting as "may" needs to get a life and stop trying to insult our intelligence with spurious posts such as this.
So "may" you've been rumbled!..go and find somewhere else to play.
e manno
April 2013