I finished my ride. Tried to save the activity, but it didn't let me. I press the power button once to put it to sleep.
When I took it out of sleep, it looks like the device has rebooted. It shows 'Garmin' load screen, but doesn't go any further from there.
Tried to soft reset it (power button for 10 secs) which resulted in the unit rebooting but getting stuck on the same screen. Tried to force it to the hard drive move (holding the lap button for 30 secs as I plug the unit into a USB port) with exactly the same outcome. I plugged it into a computer and it doesn't recognise the device.
Does anyone have any suggestions on how I can try to fix it?