I ordered my brother his archers choice range finder off of ebay. When it got delivered to my house, I took it out to test it and it wouldn't give any measurements when I tried to use it. I looked around and tried some things with it and finally got it to work properly and it worked flawlessly. But after wrapping it up and giving it to him for christmas it isn't working again and I can't remember what I did to fix it last time. Has anyone else had this issue, or know how to fix it?
