I'm having the same issue. It has been on internal wiring (through GPS mount) and working fine for well over a year. Tried taking it out and powering it via side USB with the same results. Tried multiple memory cards and USB power sources, and without any memory card. Every time it's powered, it just gets to the Viofo logo screen and you can hear the startup sound looping over and over again. Tried a couple firmware versions, including the latest 2.5. It seems to do the firmware updates, as it flashes the light as it should during update, and then the file is missing from the card after, but it still just keeps getting stuck on the Viofo logo splash screen and looping the startup sound endlessly. It sounds like the only answer at that point is it needing repair?It seems to need a repair. PM sent.