I've had my Garmin Edge 500 for nearly a month and it has worked flawlessly. Yesterday I went on a ride and tried to power up the unit and it froze with the Garmin logo on the screen. I tried a combination of buttons, holding Power/Menu/Reset all at the same time, then the same sequence and keeping Menu held down and plugging in the USB connection to the computer. When I hold the Power/Menu/Start/Reset all simultaneously the screen goes blank, but as soon as I release them the Garmin Logo reappears. The screen appears frozen with the Garmin logo displayed. I tried calling Garmin for tech support this morning but was on hold for about 15 minutes and decided to leave them an email message instead. Any ideas?