Just thought I'd post something I found out today, I had plugged into the computer a couple of days ago and updated the TT as I normally do once a week, well today I was going on a ride and put the TT on the bike and turned it on, the screen came up but I could not change anything on it, so did a couple shutdowns and restart and still locked up, so sitting there and thinking about it I went and got a paperclip (several have mentioned this trick) and did a reset, well dang if the damn thing didn't fire right up and away we went, this was the first tim for this type of problem, it worked so you might just keep that in mind, don't know what the heck TT loaded that locked it up as I didn't notice anything different.............