Garmin 1030 Edge always starts with Alarm

My Garmin 1030 edge always starts with the alarm when switched on. I don't know the key code, nor I'm I able to connect with Garmin Connect on my mobile phone.

I can only do the hard reset (2 buttons same time) to pitch it off.

Like this I can't use it at all, because it doesn't let me do any setup change.

Is there a default code?

Can I do a general setup with that the Garmin is in setup mode? May via PC or Garmin connect?

As it doesn't connect with the Garmin connect, I guess I can do nothing via the mobile phone.

Best regards, Roger