Was fiddling around today with my led lights and got a battery reset that occurred for some reason... wasn't anywhere near the battery...... all come back to life (got bulb errors with the restart because I had the rear light unplugged) but now when I put in the key the BMW screen comes up then swtiches off... if I press ON then all powers up ok but radio is on mute... any ideas what the problem is.... maybe I should disconnect the battery and force another reset...??