I had a strange problem today. I charged the unit using a charger (not the computer) and the 830 powered off as expected when full charge was reached. However, when I went to do a ride, I could not turn it on. Tried the power button many times, also held it >10 seconds to try for a reset. Nothing worked. I then used the USB cable to plug it into the computer. that powered it up and after that, could power up and down with the power button. I looked for an error log file after my ride, but could not find one. Any ideas? I will have to do some testing to see if this repeats. Note I am running the beta firmware.