Nothing surprises me with SIA they seem to fly by the seat of their pants with one goal to depart on time. On the SIN - HKG flight on the 16th of July the pax. flight display showed the aircraft going to TPE. When I queried this with the cabin crew their was a rush to the front, the display was shut down for 10 minutes and then re-appeared with the destination as HKG. Perhaps the experts could confirm but I thought this display was receiving data from the aircrafts (B744) navigation system..?