Just returned from a ride. Connected the 305 to the computer and I loaded TC and downloaded the ride file. I got some error message the file, but I don't remember what is was. The file seemed to load OK.
I then went to Garmin Connect to upload the file there. Everything started OK, but the blue like went across and froze. I looked at the garmin, nad the screen was blank. No "Battery Charging in progress" or anything. The power button did nothing.
I called Garmin Customer support. It said I had a 15 - 20 min wait, but after about 8 - 10 min I got Wayne on the line. After I described what happened, he told me to press and hold the "Lap" (RESET) and "Mode" buttons for 5 sec. Then he said to try the power button.
Voila! It powered up. Wayne had me try Garmin Connect again and it uploaded the file no problem this time.