Need Help with Northstar M1 Loran

Gang:

The Northstar M1 Loran in our Warrior has suddenly gone weird on us.

It was working great when wifey and I flew up to visit the kids, but the
very next day, my plane partner went to use the plane and the Loran kept
asking us to input "our code".

We have attempted all sorts of numbers to no avail. We have powered it on
and off. We have twisted every knob. Nothing seems to work.

The M1 has worked great for the last 4 years that we have owned the plane,
and was in there when we bought it. We have never needed a "code" to this
point.

E-mail to Northstar has gone unanswered.

Does anybody have any suggestions?

Any info would be appreciated.

Thanks,

Jerry Malin
Warrior N82045