I have a ReloadPro running the latest v1.11 firmware. If I power my unit up from a USB connection on a computer, the ReloadPro fires right up and operates as it should. However, if I plug the unit into an external USB 5v supply like a standard iPhone power adaptor, it briefly very flashes the backlight and that's it. I know I've run this specific unit from a USB supply in the past, so I'm not sure what could have happened to lose this capability. I've already re-flashed the firmware, so that shouldn't be an issue. Any ideas? Thanks!