One morning I went into my car and my 750 dash cam was not working. I didn't do any firmware upgrade or anything like that. Even if I turn it on without any memory card, it just shows the initial blackvue screen then goes black. All the led lights on the side stay on solid. I've tried formatting my memory card. I've tried loading the latest English firmware. Still, I can't get passed the initial blackvue screen and black screen. I've had this dash cam for less than 2 months.