Move the minute hand round the face until an hour strikes. Make sure you count the number of strikes. Remove the hands and replace them at the time the hours struck.
This should sort the problem out
When moving the hands make sure you pause just before the half hour, and just before the hour. Then move slowly to the hour or half hour as the case may be This pause allows the warning to act correctly. Moving the hands quickly past those points does not allow the warning to drop and the clock will, probably, not strike
Yendis, April 2009