I know what the problem was that caused the delay, and it was not an equipment failure, though the problems with ramp 3 were due to a burned cable (later in the show). The problems with ramp 2 were wiring-related, though it's hard to say exactly what the problem was.

Moral of the story: always test your show with the real soundtrack / timecode with the system in an un-armed state.

Paul.

Thanks for the insight, Paul.

Previously, at the time when the technical problem became apparent, I was under the impression that the severe weather that had occurred on the 19th of July (so, the day before the show) played at least some role, but this did not seem to be the case!

Trav.