I've seen a lot of posts about issues with alarms but not many of them offered any real solutions.
today I stumbled across a solution for one of them I don;t seem to be able to create new threads so I've added my findings to this one. Sorry if that is the wrong thing to do
for months now my issue was that my alarm would not sound in the morning if my device was turned off overnight. so I was forced to put the phone in bedside mode just so the alarm would ring
after testing this multiple times the alarm would "wake up the the BB 9700" , vibrate once but not sound the alarm
today I stumbled across the solution there turns out to be a conflict with the alarm clock and the event notifications option
if you have event notifications turned on then it stops the alarm from ringing in the morning
so to resolve this simply go to
settings>advanced options> accessibility and turn off the "Event sounds"
hey presto alarm will now ring even if the phone is switched off
see other threads 9700 Alarm Clock fail