colohad

I was given a HOLO sight by my boss. It worked fine out of the box. However, I had to pack it away before being able to mount and use it. It has less than one hour's time on it. Now, when I turn it on, the sight is blurred. This is the model 50-0021. The earlier model that is slightly larger than their new model. I've tried new batteries. Any ideas on cause & cure for this problem? Thanks. colohad