Outwest, you might be better off asking Pratt, than asking Agusta.
The Ignition caption does mean that the igniters are being told to fire. That is part of the logic through the EEC. If there is no Ignition caption, then the message has not been sent to the igniters to fire. It isn't just a message, that appears between certain RPM's, it is part of the circuit to the igniters.
I've looked throught he QRH and the Type Rating Ground School, but can't find any reason there. You'd need to talk to a Flight Instructor at Agusta, or to Pratt.
And while the box or both igniters may have failed (very unlikely), they are checked at scheduled intervals by the mechanics.