Hi DaLoCo, My 305 did the same thing. It gets "stuck" if the data cable is unplugged while the Garmin Training Centre is running. A hard reset will get it working again. You only need to press the mode and reset button simultaneously. PS Here's the list of reset functions for the Edge series: Garmin Edge Reset Power + Lap = hardware (hold 10 sec) Mode + Lap = software (hold 10 sec) Lap + Start/Stop = data purge (hold 10 sec) Note that only the last sequence given above should wipe your data. Cheers, Andrewandrewc2009-04-15 23:33:31