Messed around with it a little today
Same problem with the 12v cable
The mobius flashes blue when starting the car then 3 red flashes from the recording led then nothing.
However if I hold the power button for 5 secs to power it on the device will work fine. That solution worked using the 12v & via the wired connection until I leave the car for an hour or 2 then it's back to the problem of getting it to switch on without having to hold the power button
I'm out of ideas I'll try and get a recording of what I mean baring that a new sd card? Re flash to a different firmware.?
Okay bettz I will dig up the firmware I'm using today and email it to you. It if works on battery that must be a power issue.
You mention holding the power button fir couple seconds, does that mean fast turn on mode is off? It's worth having on.
What about a different fuse have you tried that?